[go: up one dir, main page]

WO2010058880A1 - Appareil et procédé de test pour soupape de sécurité - Google Patents

Appareil et procédé de test pour soupape de sécurité Download PDF

Info

Publication number
WO2010058880A1
WO2010058880A1 PCT/KR2009/000040 KR2009000040W WO2010058880A1 WO 2010058880 A1 WO2010058880 A1 WO 2010058880A1 KR 2009000040 W KR2009000040 W KR 2009000040W WO 2010058880 A1 WO2010058880 A1 WO 2010058880A1
Authority
WO
WIPO (PCT)
Prior art keywords
water
safety valve
pressure
test
accumulator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/KR2009/000040
Other languages
English (en)
Inventor
Seung-Jong Oh
Dong-Wook Jerng
Jong-Woon Park
Kab-Ju Kwon
Chang-Hyun Kim
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Korea Hydro and Nuclear Power Co Ltd
Original Assignee
Korea Hydro and Nuclear Power Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Korea Hydro and Nuclear Power Co Ltd filed Critical Korea Hydro and Nuclear Power Co Ltd
Priority to JP2010539315A priority Critical patent/JP5081982B2/ja
Priority to CN2009801071571A priority patent/CN101960280B/zh
Priority to US12/811,834 priority patent/US8499610B2/en
Publication of WO2010058880A1 publication Critical patent/WO2010058880A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Images

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/005—Sealing rings
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M13/00—Testing of machine parts
    • G01M13/003—Machine valves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/008—Subject matter not provided for in other groups of this subclass by doing functionality tests
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S251/00—Valves and valve actuation

Definitions

  • the present invention relates, in general, to an apparatus and method for testing the performance of a pressurizer safety valve installed on a reactor coolant system of a nuclear power plant, and more particularly, to an apparatus and method for testing the performance of a safety valve, which can perform a set pressure test, a seat tightness test, a flow rate test, a blow-down test, a water discharge test of a loop seal, a discharge load test, etc. on a pressurizer safety valve.
  • a safety valve is a pressure relief device that is operated automatically by positive pressure on an inlet port side and is characterized by instantaneous opening.
  • a safety valve typically has a built-in spring, and is opened or closed by force acting on this spring. This safety valve is used to prevent overpressure or to keep pressure constant in an apparatus that handles fluid.
  • a pressurizer safety valve used for a reactor coolant system of a nuclear power plant is a very important component for preventing overpressure of the reactor facility.
  • this pressurizer safety valve is periodically tested in order to check whether it is accurately operated within a set pressure tolerance.
  • test of the pressurizer safety valve is specified in in-service inspection code and standards such as American Society for Mechanical Engineering (ASME) OM App. I, ASME PTC 25, Korea Electric Power Industry Code (KEPIC) MOD, KEPIC MBK, and so on.
  • ASME American Society for Mechanical Engineering
  • KEPIC Korea Electric Power Industry Code
  • KEPIC KEPIC MBK
  • the pressurizer safety valve undergoes a set pressure test once every five (5) years. At least 20% of all safety valves are subjected to the set pressure test every two (2) years. When a part of the safety valve is replaced, the replaced safety valve undergoes the set pressure test before production of electric power is resumed.
  • test methods complying with these code and standards include an in-situ test using an auxiliary lift device with the safety valve installed on the facility, a bench test using a bench set on which the safety valve is mounted, and a test facility test using an off-site test facility.
  • the in-situ test is a method that measures the set pressure with the safety valve installed on the facility. Particularly, if the safety valve is installed on the facility, for instance, by welding, only the in-situ test can be used.
  • the auxiliary lift device is a device that applies an auxiliary lifting force to system pressure in order to open the safety valve.
  • the auxiliary lift device is mounted on the safety valve. After keeping thermal equilibrium for 30 minutes or more, the pressure of an air motor of the auxiliary lift device is gradually increased to the set pressure of the safety valve so as to pop open the safety valve.
  • the set pressure test of the pressurizer safety valve using the auxiliary lift device is generally performed using the auxiliary lift device prior to a cool down operation after the reactor is stopped in order to minimize an influence on the power plant operation during testing and to determine whether or not the pressurizer safety valve requires maintenance during overhaul of the power plant.
  • this test is performed, there is a possibility of causing a transient phenomenon in which the pressure of a reactor coolant system is reduced during operation, and a fluid containing radioactive materials is discharged through the safety valve.
  • the bench test is a method of testing the safety valve attached to the bench set having a flange at room temperature.
  • This bench set is equipped with a pressure supply apparatus of a fluid such as nitrogen, air or water, a pressure controller, a flange coupled with the subject safety valve, a pressure gauge connected to the flange, and so on.
  • the bench set may include a complicated device having several flanges coupled with, for instance, a chart recorder for recording set values in order to perform various functions and an automatic test.
  • the type of this bench set is determined according to the number and kind of safety valves to be tested, code requirements, and available space. Examples of the bench set are well disclosed in Korean Patents Nos. 10-0540308 (titled Apparatus for Testing Seat Tightness and Pressure Setting of Pressurizer Safety Valves granted on December 26, 2005) and 10-0311775 (titled Safety Valve Testing Apparatus granted on September 28, 2001), and US Patent No. 4,893,494 (titled Method and System for Testing Safety Relief Valves granted on January 16, 1990).
  • the apparatus for testing seat tightness and pressure setting of pressurizer safety valves disclosed in Korean Patent No. 10-0540308 is designed to directly carry out a seat tightness test and a pressure setting test on the pressurizer safety valve at room temperature.
  • the apparatus for testing seat tightness and pressure setting of pressurizer safety valves, each of which has a seat tightness checking flange includes: a nitrogen gas storage storing nitrogen gas; a pump connected to the nitrogen gas storage, pressurizing and pumping the nitrogen gas, pressure of which is increased to seat tightness test or pressure setting test values of the safety valve, and discharging the pumped nitrogen gas to a pressure storage tank; the pressure storage tank storing the nitrogen gas discharged from the pump; a pressure regulating valve connected to the pressure storage tank, regulating pressure of the nitrogen gas discharged from the pressure storage tank, and discharging the regulated nitrogen gas to an injection pipe installed on the side of a seat tightness and pressure setting test bench through a high-pressure hose; and the seat tightness and pressure setting test bench injecting the nitrogen gas
  • the safety valve testing apparatus disclosed in Korean Patent No. 10-0311775 is designed to test abnormality of a safety valve using forcibly provided pressure.
  • the safety valve testing apparatus includes a high-pressure cleaner supplying pressurized water; a tester including a pressure tank installed in an upright posture, an upper space of which enters a high-pressure state so as to buffer a change in pressure when receiving the pressurized water from the high-pressure cleaner at a lower portion thereof, a main valve preventing the pressurized water from simultaneously flowing to both a test connector connected with a subject safety valve and a recorder recording a test pressure state until set pressure is maintained in the pressure tank, and a flange connected with the subject safety valve through the test connector; and the recorder converting a change in output pressure of the main valve of the tester into an electrical signal, and recording the converted electrical signal.
  • the pressure tank to which the pressure is provided through the high-pressure cleaner, is additionally provided with an accumulator at a front end thereof which outputs pressure under overpressure.
  • the flange is installed on a support plate.
  • the support plate is configured such that a size thereof can be selected according to a size of the subject safety valve.
  • the method and system for testing safety relief valves disclosed in US Patent No. 4,893,494 utilizes a pressure vessel coupled with and being in communication with the subject safety relief valve and a high pressure fluid reservoir supplying the fluid to the pressure vessel.
  • the method and system permit the subject safety relief valve with air as well as water.
  • the system includes: a first pressure vessel; a second pressure vessel; means for releasably securing a safety relief valve and in fluid communication with the second pressure vessel; first means for controlling high pressure fluid flow into the first pressure vessel; a first fluid passageway connecting and disposed between the first and second pressure vessels; a second fluid passageway connecting and disposed between the releasable securing means and the second pressure vessel; and second means for controlling fluid flow between the first and second pressure vessels.
  • the bench test using the bench set is used for the set pressure test and seat tightness test for the safety valve at room temperature, but has conditions different from high-temperature thermal equilibrium conditions on which the safety valve is actually installed and operated on the facility.
  • the facility or system e.g. reactor coolant system
  • the test facility test using the off-site test facility is performed in the state in which the subject safety valve is mounted on the test facility and under the same conditions of fluid, temperature, pressure and thermal equilibrium as the facility in which the safety valve is used.
  • the test facility test using the off-site test facility is the most accurate test method among the aforementioned test methods.
  • the apparatus for testing the performance of a pressurizer safety valve according to the present invention belongs to the off-site test facility, and can carry out the test under the same conditions on which the pressurizer safety valve is installed and operated.
  • FIG. 1 schematically illustrates a conventional apparatus for testing the performance of a safety valve.
  • the testing apparatus has a test vessel 1 supplied with steam pressure from a boiler 2 as a pressure supply.
  • the boiler 2 must be equipped with accessories such as a water-supply facility 3 and a fuel injector. Since energy may be released during testing due to damage to a subject safety valve 4, the test vessel 1 is installed between the subject safety valve 4 and the boiler 2, and the boiler 2 is equipped with a pressure supply valve 7 and a bypass valve 8 of the pressure supply valve 7 to enable pressurization of the subject safety valve 4 up to pressure of the boiler 2 or to block the release of the energy when the subject safety valve 4 is damaged during testing.
  • a shut-off valve 5 for the subject safety valve 4 is installed between the subject safety valve 4 and the test vessel 1 to shut off the steam in the event of the damage or leakage of the safety valve.
  • This shut-off valve 5 has a sufficient volume that a flow of test fluid injected into the subject safety valve 4 from the test vessel is not restricted.
  • a pipe connecting the two valves 5 and 6 has a sufficient size such that unnecessary pressure drop does not take place between the subject safety valve 4 and the test vessel 1 .
  • the test facility performing all flow tests on the safety valve is designed so that all of the valves, adaptors, flanges, and test nozzles withstand a discharge force of the subject safety valve 4 as well as the discharge force transmitted to the test vessel. All pressure sensing pipes are connected spaced apart from inlet and outlet nozzles 12 and 13 of the test vessel 1 in order to avoid an error in pressure measurement which is responsible for a flow rate during testing.
  • the test facility is equipped with a steam trap 10 and a drain valve 11 so as to be kept warm by a heat insulator and to produce saturated steam of at least 98%.
  • the flow rate passing through the subject safety valve 4 and the overpressure applied to the subject safety valve 4 are involved in capacity of the boiler 2, i.e. the pressure supply, to generate flow.
  • the boiler 2 i.e. the pressure supply
  • a high-capacity boiler and accessories compatible with the boiler are required.
  • the establishment of the safety valve test facility requires relatively high cost and wide space.
  • excessive noise e.g. of 130 dB or more
  • an exemplary embodiment of the present invention provides an apparatus and method for testing the performance of a safety valve, which can perform tests under the same operation conditions as a pressurizer safety valve installed on a reactor coolant system of a nuclear power plant so as to perform the tests with precision.
  • Another exemplary embodiment of the present invention provides an apparatus and method for testing the performance of a safety valve, which can relatively easily produce and use high-temperature, high-pressure steam required for testing the safety valve because a complicated boiler facility is not required.
  • Still another exemplary embodiment of the present invention provides an apparatus and method for testing the performance of a safety valve, which can optimize constituent components on the respective quadrants as a closed loop so as to have a compact configuration, thereby effectively reducing an installation space and materials required for manufacturing.
  • Yet another exemplary embodiment of the present invention provides an apparatus and method for testing the performance of a safety valve, which can properly absorb energy generated from the safety valve to reduce noise and simultaneously to effectively condense and collect an expensive purified fluid.
  • an apparatus for testing the performance of a safety valve to perform a set pressure test, a seat tightness test, a flow rate test, a blow-down test, a discharge test of a loop seal, a discharge load test, etc. on the safety valve.
  • the apparatus includes: an accumulator 21 including at least one electric heater 22 for heating a predetermined amount of water filled therein, and storing steam produced by the electric heater 22 under high pressure; a test vessel 41 storing the steam supplied from the accumulator 21 under high pressure, and providing test pressure to a subject safety valve 48, the steam being supplied after flow rate and pressure thereof are controlled; a condensing tank 81 storing demineralized water to be supplied to the accumulator 21, and condensing and collecting the high energy steam discharged from the subject safety valve 48; and a water-supply pump 111 supplying the water stored in the condensing tank 81 to the accumulator 21.
  • a method for testing the performance of a safety valve to perform a set pressure test, a seat tightness test, a flow rate test, a blow-down test, a water discharge test of a loop seal, a discharge load test, etc. on the safety valve.
  • the method includes: 1) filling a condensing tank 81 with a predetermined amount of water, the condensing tank 81 storing demineralized water to be supplied to an accumulator 21 and condensing and collecting steam discharged from the subject safety valve 48; 2) filling the accumulator 21 with the water of the condensing tank 81 to a predetermined water level using a water-supply pump 111; 3) heating the water filled in the accumulator 21 using at least one electric heater 22 to produce the steam; 4) supplying the steam produced from the accumulator 21 to a test vessel 41 under a control of flow rate and pressure, and pressurizing the accumulator 21 and the test vessel 41 to a preset pressure; and 5) continuously operating the electric heater 22 of the accumulator 21 to increase the pressure to operating pressure of the subject safety valve 48, and testing the subject safety valve 48.
  • the testing apparatus performs tests under the same operation conditions (fluid, pressure and temperature) as a pressurizer safety valve installed on a reactor facility, so that it can perform the tests more precisely than an in-situ test using an auxiliary lift device and a bench test using a bench set on which the safety valve is mounted, both of which test under operation conditions different from those of the safety valve.
  • the testing apparatus includes an accumulator of an optimum volume having an electric heater of an optimum capacity and a test vessel of an optimum volume, which are required for testing the safety valve, so that it can relatively easily produce and use high-temperature, high-pressure steam required for testing the safety valve because a complicated boiler facility is not required.
  • the testing apparatus optimizes the size and capacity of main components, such as a water-supply treatment system, a water-supply pump, an accumulator, a test vessel and a condensing tank, on the respective quadrants as a closed loop so as to have a compact configuration, so that it can effectively reduce an installation space and materials required for manufacturing. Since the various components of the testing apparatus are located adjacent to each other when the testing apparatus is operated, it is very easy to observe the situations of the components or to monitor the instruments. As a result, this configuration is very effective for safe operation and optimum performance maintenance of the testing apparatus.
  • main components such as a water-supply treatment system, a water-supply pump, an accumulator, a test vessel and a condensing tank
  • the testing apparatus is configured to sparge a large quantity of steam discharged when the subject safety valve is opened through a sparger submerged in the water of the condensing tank, and thus properly absorb energy generated from the safety valve, so that it can not only effectively reduce noise but also effectively condense and collect an expensive purified fluid.
  • the accumulator can relatively easily produce high-temperature, high-pressure water and steam.
  • the testing apparatus includes a blind flange capable of using the high-temperature, high-pressure water at a lower portion of the accumulator and another blind flange capable of using the high-temperature, high-pressure steam at an upper portion of the accumulator, so that it can perform various tests requiring the aforementioned high-temperature, high-pressure water and steam.
  • FIG. 1 schematically illustrates a conventional apparatus for testing the performance of a safety valve
  • FIG. 2 is a piping and instrumentation drawing of an apparatus for testing the performance of a pressurizer safety valve according to an exemplary embodiment of the present invention
  • FIG. 3 is a perspective view of a sparger inside a condensing tank for steam discharged from a subject safety valve
  • FIG. 4 is a perspective view of an apparatus for testing the performance of a pressurizer safety valve according to an exemplary embodiment of the present invention
  • FIG. 5 is a graph showing results of simulating a change in pressures of an accumulator and a test vessel using a computer code for thermal hydraulic fluid analysis during testing of the subject safety valve;
  • FIG. 6 is a flow chart illustrating a method for testing the performance of a safety valve according to an exemplary embodiment of the present invention.
  • FIG. 2 is a piping and instrumentation drawing of an apparatus for testing the performance of a pressurizer safety valve according to an exemplary embodiment of the present invention.
  • the testing apparatus 20 includes an accumulator 21, a test vessel 41, a condensing tank 81, a water-supply treatment system 101, a water-supply pump 111, pipes and valves, instruments, air compression systems, control and supervisory systems (not shown), and a power supply (not shown).
  • the accumulator 21 is a device that is filled with a predetermined amount of water, heats the water to produce steam using an electric heater, and stores high-pressure steam.
  • the accumulator 21 is equipped with a plurality of electric heaters 22, each of which has a proper heat generation capacity (e.g. 300kW) required to produce and pressurize the steam.
  • a volume capacity of this accumulator 21 is determined by calculating an amount of accumulated steam required on the basis of a set pressure and a discharge flow rate of a subject safety valve 48. Capacities of the accumulator 21 and each electric heater 22 are determined by a capacity of available electric power source and an amount of steam used.
  • a safety valve 23 is coupled to the accumulator 21, and thus relieves overpressure to protect the accumulator 21 when pressure of the interior of the accumulator reaches a preset pressure (e.g. 220 kg/cm 2 ).
  • a variety of instruments are installed on the accumulator 21 for proper operation of the accumulator 21. These instruments include a temperature gauge 24 for a liquid zone, a temperature gauge 25 for a steam zone, a pressure gauge 26, a water level gauge 27 for low temperature, a water level gauge 28 for high temperature, and so on.
  • the temperature gauge 24 and 25 are attached to a shell of the accumulator 21 in such a manner that a hole is bored into the shell of the accumulator 21 at an appropriate depth, and then a temperature sensor is inserted and welded in the hole.
  • a sensing pipe is disposed between the pressure gauge 26 and the water level gauges 27 and 28, and is connected with a nozzle, which is inserted and welded in a through-hole bored through the shell of the accumulator 21.
  • shut-off valve 26-1 is installed on the pressure gauge 26 in order to isolate the sensing pipe in the event of correction or fluid leakage of the pressure gauge 26.
  • shut-off valves 27-1 and 27-2 and shut-off valves 28-1 and 28-2 are also installed on the water level gauge 27 for low temperature and the water level gauge 28 for high temperature respectively in order to isolate the sensing pipe in the event of correction or fluid leakage of the water level gauges 27 and 28.
  • Values of supervisory variables measured by these instruments are sent to the control and supervisory systems, and are used to operate the testing apparatus in a safe and efficient manner. While the testing apparatus is operated, the pressure of the accumulator 21 can be maintained within a range between atmospheric pressure and design pressure. In order to maintain a proper pressure, the accumulator 21 is provided with a warning device so as to give an alarm when the pressure thereof becomes lower or higher than a preset pressure. Further, a water level of the accumulator 21 is kept higher than that of each electric heater 22. In order to maintain a proper water level, the accumulator 21 is provided with another warning device so as to give an alarm when the water level thereof becomes lower or higher than a preset water level. In addition, in order to maintain a proper temperature, the accumulator 21 is provided with another warning device so as to give an alarm when the temperature thereof becomes lower or higher than a preset temperature.
  • the accumulator 21 is provided with an inspection hole 29 through which inspection of interior situations thereof is possible.
  • This inspection hole 29 is the hole of a hollow pipe, an end 30 of which is closed by a blind flange or is blocked by a stopper or a cap welded, and communicates with the accumulator 21 in such a manner that a hole is bored in the shell of the accumulator 21, and the hollow pipe is inserted and welded in the hole of the shell of the accumulator.
  • the blind flange or the stopper or cap of the end 30 of the inspection hole 29 is opened or cut out.
  • an inspection instrument such as an endoscope is inserted into the inspection hole 29 to inspect soundness of nozzles, electric heaters 22, etc. in the accumulator 21.
  • an inspection instrument such as an endoscope is inserted into the inspection hole 29 to inspect soundness of nozzles, electric heaters 22, etc. in the accumulator 21.
  • the end 30 of the inspection hole 29 is closed by the blind flange or is welded with the stopper or cap again, so that the inspection hole 29 is sealed.
  • the accumulator 21 is connected with a pipe 31, at a lower portion thereof, which can inject or drain the water.
  • this pipe 31 is equipped with a blind flange 32 used for connection with the other instrument or facility.
  • Various kinds of useful tests can be carried out using the high-temperature, high-pressure water of the accumulator 21 of this testing apparatus. Such kinds of tests include an seat tightness test and a set pressure test of a water pressure relief valve, an operation test and a gland packing tightness test of a water valve, and so on.
  • the lower pipe 31 of the accumulator 21 is used when the water is supplied to or drained from the accumulator 21.
  • a drain valve 33 and an orifice 34 are provided in order to drain the water from the interior of the accumulator 21, .
  • This drain valve 33 is mainly used when the water is drained from the interior of the accumulator 21, and the orifice 34 reduces a flow rate and pressure to a proper level so as to make smooth operation. Since the orifice 34 can sufficiently lower pressure applied to a downstream side thereof, an allowable pressure level of the pipe connected between the downstream side of the orifice 34 and the condensing tank can be lowered to a proper level, and thus an installation cost can be effectively reduced.
  • a shut-off valve 40 is installed on an upstream side of the drain valve so as to isolate the drain valve 33 when the drain valve 33 and the orifice 34 malfunction.
  • the accumulator 21 is connected with a steam discharge or pressurization pipe 35 at an upper portion thereof which discharges the steam of the accumulator 21 and is able to pressurize the test vessel.
  • this pressurization pipe 35 is coupled with a blind flange 36 used for connection with the other instrument or facility.
  • Various kinds of useful tests can be carried out using the high-temperature, high-pressure steam of the accumulator 21 of this testing apparatus. Such kinds of tests include an seat tightness test and a set pressure test of a steam safety valve, an operation test and a gland packing tightness test of a steam valve, and so on.
  • a structural analysis for thermal stress on the operation conditions of the accumulator is performed on joints, particularly a nozzle 37 of the accumulator 21 to which the lower pipe 31 of the accumulator 21 is connected and a nozzle 38 of the accumulator 21 to which the steam discharge pipe 35 of the accumulator 21 is connected, so as to check safety. If necessary, a thickness, shape, etc. of each nozzle and its neighboring shell of the accumulator are reinforced.
  • the test vessel 41 is a device that provides test pressure to the subject safety valve 48.
  • the steam discharge pipe 35 of the upper portion of the accumulator 21 is connected with the test vessel 41 through a steam supply pipe 44 and pressure control valves 42 and 43 on a upstream side of the test vessel 41.
  • the first pressure control valve 42 supplying the steam of the accumulator 21 to the test vessel 41 at a proper flow rate is used when the subject safety valve 48 is tested in the state in which the test vessel 41 is pressurized at a high pressurization rate (e.g. above 100 psi/sec).
  • This test is for performing a water discharge test of a loop seal installed on a front end of the pressurizer safety valve, and a set pressure test of the pressurizer safety valve on overpressure conditions occurring in the event of a design basis accident of a reactor facility.
  • the second pressure control valve 43 which has a capacity smaller than that of the first pressure control valve 42 and is installed parallel to the first pressure control valve 42, is used when the test vessel 41 is preheated, or when the pressure of the test vessel is automatically kept constant, or when the subject safety valve 48 is tested in the state in which the test vessel is pressurized at a low pressurization rate (e.g. below 2 psi/sec).
  • a low pressurization rate e.g. below 2 psi/sec.
  • shut-off valve 51 is installed on an upstream side of the first pressure control valve 42.
  • a shut-off valve 52 is installed on an upstream side of the second pressure control valve 43.
  • a pressure gauge 49 and a temperature gauge 50 are installed for proper operation of the test vessel 41.
  • a sensing pipe to which the pressure gauge 49 is connected is connected with a nozzle, which is inserted and welded in a through-hole bored through a shell of the test vessel.
  • the temperature gauge 50 is attached to the shell of the test vessel 41 in such a manner that a hole is bored into the shell of the test vessel 41 at an appropriate depth, and then a temperature sensor is inserted and welded in the hole.
  • a shut-off valve 49-1 is installed on the pressure gauge 49 in order to isolate the sensing pipe in the event of correction or fluid leakage of the pressure gauge 49. Values of supervisory variables measured by these instruments are sent to the control and supervisory systems, and are used to operate the testing apparatus in a safe and efficient manner.
  • a safety valve 53 is installed on the test vessel 41, and thus relieves overpressure to protect the test vessel 41 when pressure of the interior of the test vessel 41 reaches a pressure set piont(e.g. 220 kg/cm 2 ).
  • a steam discharge pipe 45 of an upper side of the test vessel 41 is connected to a Venturi tube 46 for measuring a flow rate, a loop seal 47 filled with water, and the subject safety valve 48 in that order.
  • the subject safety valve 48 is the pressurizer safety valve, which is a main target to be tested in the testing apparatus.
  • the Venturi tube 46 is coupled with a flow meter 46-1, which measures a flow rate when the subject safety valve 48 is operated.
  • This flow meter 46-1 is coupled with shut-off valves 46-2 and 46-3 in order to isolate the sensing pipe when corrected or malfunctioning.
  • a pipe between the Venturi tube 46 and the loop seal 47 is connected to a temperature gauge 54 for calculating density of fluid discharged from the safety valve, and a pressure gauge 55 for measuring pressure when the subject safety valve 48 is operated.
  • This pressure gauge 55 is also coupled with a shut-off valve 55-1 in order to isolate the sensing pipe for maintenance or under malfunctioning.
  • the loop seal 47 is a device that is filled with water in the case in which high-temperature, high-pressure steam is not in direct contact with the safety valve, and is generally implemented as a U-shaped tube. In the case in which the loop seal 47 is not required to be filled with water, the loop seal 47 can be configured to be continuously drained, and thus be maintained in the state where it is filled with steam.
  • the loop seal 47 is equipped with a vent valve 56 for filling water and a drain valve 57. The loop seal 47 is filled with water before the testing apparatus is pressurized.
  • an electrical heat tracing system 58 and a temperature gauge 70 are installed on the subject safety valve 48 and a pipe of an upstream side of the subject safety valve 48, particularly the loop seal 47. This configuration makes it possible to realize a temperature condition of an actual power plant.
  • a preheating pipe 59-1 and a preheating valve 59 both of which can discharge the steam from the test vessel 41, are installed.
  • a shut-off valve 60 for the preheating valve is installed on an upstream side of the preheating valve 59 in order to shut off the preheating valve 59.
  • An orifice 61 is provided on a downstream side of the preheating valve 59. The orifice 61 is functionally identical to that 34 of the downstream side of the drain valve 33 of the accumulator 21.
  • the steam of the accumulator 21 is supplied to and pressurized in the test vessel 41 through the pressure control valves 42 and 43. Then, the preheating valve 59 is opened to discharge steam from the test vessel 41, and thereby high-temperature steam of the accumulator 21 is supplied to the lower portion of the test vessel 41, and then is discharged to the upper portion of the test vessel 41. Thereby, the test vessel 41 is preheated. At this time, in order to minimize thermal stress of the test vessel 41 and its associated instruments, they must be preheated at a predetermined preheating rate.
  • condensate water is generated from the test vessel 41 and its connected pipes.
  • the condensate water is drained through a steam trap 62.
  • a strainer 63 for filtering foreign materials is installed, and a shut-off valve 64 for isolating the strainer 63 and the steam trap 62 are installed for use under malfunctioning of the strainer 63 and the steam trap 62.
  • condensate water generated inside the test vessel 41 and the steam supply pipe 44 between the first pressure control valve 42 and the test vessel 41 is discharged through a steam trap 65.
  • a strainer 66 for filtering foreign materials is installed, and a shut-off valve 67 for isolating the strainer 66 and the steam trap 65 are installed for use under malfunctioning of the strainer 66 and the steam trap 65.
  • a condensate water discharge valve 68 for discharging the condensate water from the lower portion of the test vessel 41 just before testing the operation of the subject safety valve 48 is installed aside from the steam trap 65.
  • An orifice 69 is provided on a downstream side of the condensate water discharge valve 68.
  • the orifice 69 is functionally identical to that 34 of the downstream side of the drain valve 33 of the accumulator 21.
  • a spindle In order to continuously measure a disk opening of the subject safety valve 48, a spindle is provided with a linear variable differential transformer (LVDT) 48-1.
  • LVDT linear variable differential transformer
  • a vibration gauge 71 In order to measure dynamic characteristics and discharge load during operation of the subject safety valve 48, a vibration gauge 71, is installed on the loop seal on the upstream side of the subject safety valve 48 and another vibration gauge 72 and a pressure gauge 73 are installed on the pipe downstream of the subject safety valve 48.
  • a sensing pipe for the pressure gauge 73 is provided with a shut-off valve 73-1 in order to isolate the sensing pipe under correction or malfunction.
  • a structural analysis for thermal stress under the operating conditions of the test vessel is performed on joints, particularly a nozzle 74 of the lower portion of the test vessel 41 and a nozzle 75 of the upper portion of the test vessel 41, so as to check safety. If necessary, a thickness, shape, etc. of each nozzle and its neighboring shell of the test vessel are reinforced.
  • a condensing tank 81 functions to store demineralized water used in the testing apparatus of the present invention, to maintain a proper head with respect to the water-supply pump, to collect the condensate water generated during the preheating and pressurization of the test vessel, to condensate and collect the steam discharged from the subject safety valve, and to absorb noise of the subject safety valve.
  • a discharge pipe 82 extends from the outlet port of the subject safety valve to a sparger 83 inside the condensing tank 81, wherein the discharge pipe 82 passes through a shell of the condensing tank 81.
  • FIG. 3 is a perspective view of a sparger inside the condensing tank for steam discharged from a subject safety valve.
  • the sparger 83 is provided with a plurality of holes 121, through which the steam discharged from a subject safety valve is sparged, and is distributed at predetermined gaps with a predetermined size.
  • the sparger 83 is submerged under water.
  • the test When the test is performed using the testing apparatus of the present invention, a large quantity of steam is discharged to the discharge pipe 82 all at once when the subject safety valve 48 is operated, and then the discharged steam is smoothly sparged into the condensing tank 81 through the numerous holes 121 of the sparger 83. At this time, the sparged steam is condensed while coming in contact with the water colder than the discharged steam in the condensing tank 81.
  • the holes of the sparger 83 are preferably formed such that the steam is sparged in horizontal and downward directions other than an upward direction for the purpose of efficient sparging and condensation.
  • the pipe connected to the outlet port of the subject safety valve 48 is enclosed by an acoustic absorbent.
  • the condensing tank 81 is connected with a pipe 84, which collects condensate water generated during operation of the test apparatus of the present invention.
  • the condensing tank 81 is equipped with a shut-off valve 85 that shuts off the condensate water collecting pipe 84 according to temperature and pressure conditions thereof, and a drain valve 86 that drains the condensate water to the outside when the shut-off valve 85 is closed.
  • the condensing tank 81 maintains the demineralized water to a preset level, and collects and condenses the steam and condensate water generated during preheating and pressurizing of the test vessel 41. At this time, the temperature of the condensing tank 81 is monitored through a temperature gauge 93. If the temperature of the condensing tank 81 becomes higher than a preset temperature (e.g. 95 C), a condensing effect of the condensing tank 81 is degraded. As such, the shut-off valve 85 for the condensate water collecting pipe is closed in order to stop collecting the condensate water, and then the drain valve 86 is opened.
  • a preset temperature e.g. 95 C
  • a cooler or a radiator capable of cooling the demineralized water in the condensing tank 81 may be separately installed.
  • This configuration belongs to an exemplary embodiment (not shown herein).
  • the condensing tank 81 is a tank into which a large quantity of high-temperature, high-pressure steam is introduced when the subject safety valve 48 is operated. For this reason, the condensing tank 81 is provided with rupture disks 87 and 88, which prevent overpressure and discharge a large quantity of fluid.
  • Each of the rupture disks 87 and 88 is ruptured when the condensing tank 81 exceeds a predetermined pressure, thereby protecting the pressure in the condensing tank 81 from exceeding the design pressure.
  • the rupture disks 87 and 88 are installed in a pair. Thus, even if one of the rupture disks malfunctions, the other enables normal function to continue.
  • Each of the rupture disks 87 and 88 is designed to have a diameter of at least 15 inches (about 38.1 cm), thereby acting as a man hole for inspecting the interior of the condensing tank 81.
  • the condensing tank 81 is equipped with a vent pipe 89 and a vent valve 90, both of which can reduce the pressure of the interior of the condensing tank 81 or exhaust gas of the interior of the condensing tank 81. Further, the condensing tank 81 is equipped with a drain pipe 91 and a drain valve 92, both of which can fill the condensing tank 81 with the water or drain the water from the condensing tank 81.
  • the condensing tank 81 is connected with a pressure gauge 94, a temperature gauge 93 and a water level gauge 95 for smooth operation.
  • a sensing pipe to which the pressure gauge 94 and the water level gauge 95 are connected is connected to the condensing tank 81.
  • a through-hole is bored into the shell of the condensing tank 81, and then the sensing pipe is inserted and welded in the through-hole.
  • the temperature gauge 93 is attached to the condensing tank 81 in such a manner that a hole is bored into the shell of the condensing tank 81, and then a temperature sensor is inserted and welded in the hole.
  • the pressure gauge 94 is equipped with a shut-off valve 94-1.
  • the water level gauge 95 is equipped with upper and lower shut-off valves 95-1 and 95-2. Values of supervisory variables measured by these instruments are sent to the control and supervisory systems, and are used to operate the testing apparatus in a safe and efficient manner.
  • the water-supply treatment system 101 is a feeder that purifies ordinary water into demineralized water by means of a multi-stage purifier, and then supplies the demineralized water to the condensing tank 81.
  • the water-supply treatment system 101 is connected to the drain pipe 91 at the lower portion of the condensing tank 81.
  • the demineralized water produced from the water-supply treatment system 101 is supplied to the condensing tank 81 through a supply-water or outflow valve 102, a check valve 103, and the drain pipe 91. In this case, the vent valve 90 of the condensing tank 81 should be opened for the demineralized water to be smoothly supplied.
  • the check valve 103 prevents the water of the condensing tank 81 from flowing back to the water-supply treatment system 101 when the water is not supplied to the condensing tank 81.
  • the drain pipe 91 of the condensing tank 81 serves both as a pipe supplying the demineralized water from the water-supply treatment system 101 and a pipe transferring the demineralized water from the condensing tank 81 to the water-supply pump.
  • the water-supply treatment system 101 may be replaced by an ordinary supply water system according to a cleanliness of fluid required when the subject safety valve 48 is tested using the testing apparatus of the present invention.
  • the water-supply pump 111 functions to supply the demineralized water of the condensing tank 81 to the accumulator 21. An amount of the supplied demineralized water is dependent on the water level of the accumulator 21.
  • the water-supply pump 111 is configured such that its inlet port is connected with the drain pipe 91 of the condensing tank 81, and its inflow valve 112 is installed between its inlet port and the drain pipe 91. Further, the water-supply pump 111 is configured such that its outlet port is connected with the lower pipe 31 of the accumulator through its outflow pipe, and its outflow valve 115 is installed between its outlet port and the lower pipe 31.
  • the inflow and outflow valves 112 and 115 of the water-supply pump are used when the water-supply pump 111 is required for isolation such as for maintenance.
  • the outlet port of the water-supply pump 111 is equipped with an outlet port pressure gauge 113, and a shut-off valve 113-1 is installed on a pressure sensing pipe connected to the outlet port pressure gauge 113, and thus is used in the event of leakage or correction of the outlet port pressure gauge 113.
  • a check valve 116 is installed on a downstream side of the outflow valve 115 of the water-supply pump, and prevents the water of the accumulator 21 from flowing back when the water-supply pump is stopped.
  • the pipe running from the outlet port of the water-supply pump 111 to the accumulator 21 may be provided with a micro-filter according to a cleanliness of fluid required for the testing apparatus of the present invention.
  • This pipe may be provided with a preheater for preheating the supplied water to a high temperature.
  • the high-temperature water can be supplied to the accumulator 21, so that thermal shock can be minimized (not shown herein).
  • FIG. 4 is a perspective view of an apparatus for testing the performance of a pressurizer safety valve according to an exemplary embodiment of the present invention.
  • the testing apparatus is designed such that its components are optimally arranged so as to further reduce a required space.
  • the main components i.e. the accumulator 21, the test vessel 41, the condensing tank 81, and the water-supply pump 111, are arranged on the respective quadrants, and are connected with each other by the pipes so as to form a closed loop.
  • the water-supply treatment system 101 is surrounded by the four main components.
  • the drain pipe 33-1 of the accumulator 21, the preheating pipe 59-1 of the test vessel, and the drain pipes 64-1 and 68-1 for condensate water are arranged between the main components.
  • a volume of the accumulator 21 is greater than that of the test vessel 41. This is because the accumulator 21 is equipped with a liquid zone and at least one electric heater required for producing steam, and has a function of storing high-pressure steam required for testing the subject safety valve 48.
  • the volumes of the accumulator 21 and the test vessel 41 are designed as proper volumes capable of producing, storing, and using an amount of steam required for testing the subject safety valve 48.
  • pressure behaviors and fluid flows of the accumulator 21 and the test vessel 41 can be simulated, and the volumes of the accumulator 21 and the test vessel 41, sizes of the pressure control valves, etc. can be designed on a proper scale required for testing the subject safety valve 48.
  • FIG. 5 is a graph showing results of simulating a change in pressures of an accumulator and a test vessel using a computer code for thermal hydraulic fluid analysis during testing of the subject safety valve.
  • the test is carried out under the condition that the initial pressures of the accumulator 21 and the test vessel 41 are set to 191 kg/cm 2 and 130 kg/cm 2 , respectively.
  • the first pressure control valve 42 is opened so as to have an opening of 2% for up to 4 seconds after the test is initiated, and then opening of 30%.
  • a predicted change in pressures of the accumulator 21 and the test vessel 41 is shown in FIG. 5. It takes 4.26 seconds for the subject safety valve 48 to reach an opening pressure after the test is initiated. When 8.3 seconds have elapsed after the test is initiated, the subject safety valve 48 is closed.
  • the subject safety valve 48 remains opened for 4.04 seconds, and that a blow-down pressure can be measured when the subject safety valve 48 is closed.
  • sufficient time to reach an opening set pressure must be given.
  • the opening of the first pressure control valve 42 is preferably set as small as possible at the beginning. After the subject safety valve 48 reaches the set pressure, a time which it takes to blow down the pressure of the test vessel must be kept as long as possible due to the steam discharged by the opening of the valve. Only in this case, is it possible to measure a flow rate of the discharged steam according to a change in pressure of the test vessel 41.
  • the opening of the first pressure control valve 42 is preferably varied and kept to the maximum degree as soon as possible.
  • the accumulator 21 is preferably installed in a vertical direction rather than in a horizontal direction.
  • the reasons are as follows: First, it is possible to provide a sufficient margin to the length for measuring the water level (i.e. the length from a lower tap to an upper tap for measuring the water level). Second, it is possible to maintain the water level to the minimum extent so as to keep the electric heater under water, and to secure the steam zone to the maximum extent. Third, it is possible to maintain a sufficient separation distance between the water surface of the accumulator 21 and the outflow pipe of the upper portion of the accumulator 21, and thus to inhibit carry-over of the moisture when the steam of the accumulator 21 is transferred to the test vessel 41.
  • the accumulator 21 is firmly fixed to the floor by a skirt 131.
  • the skirt 131 supports a static load of the accumulator 21 and a dynamic load when the steam of the accumulator 21 is discharged to the test vessel 41 through the discharge pipe 35 at a maximum flow rate.
  • a structural analysis for the static and dynamic loads is performed to check safety, thereby allowing the accumulator to have a proper shape and thickness.
  • the test vessel 41 is also firmly fixed to the floor by a skirt 132, which supports a static load of the test vessel 41 and a dynamic load when the subject safety valve 48 is operated.
  • the steam discharge pipe 35 of the accumulator 21 and the discharge pipe 82 of the subject safety valve 48 are subjected to instantaneous dynamic load and thermal stress when the subject safety valve 48 is operated. As such, a structural analysis for sizes and layout of these pipes is performed to check safety, and then supports for these pipes are designed and installed at proper positions.
  • test vessel 41 is preferably installed in a vertical direction, and the subject safety valve 48 is preferably installed at the upper portion of the test vessel 41.
  • the subject safety valve 48 is preferably installed on the same pipe and position as the pipe and position on which the pressurizer or the safety valve of the reactor coolant system of the nuclear power plant is installed and operated. This is because the test can be performed by accurately applying either the pressure occurring when the facility used for the subject safety valve 48 undergoes overpressure or the pressurization rate (e.g. 375 psi/sec) to the subject safety valve 48.
  • Both a flange 48-2 to which the subject safety valve 48 is attached at the upper portion of the test vessel 41 and a flange 48-3 of the outflow pipe of the subject safety valve are preferably manufactured and installed in the shape of a spool piece that facilitates removal of the subject safety valve 48 having various dimensions (not shown herein).
  • the condensing tank 81 is firmly fixed to the floor by a band-like support 133 so as to support a dynamic load when the subject safety valve 48 is operated.
  • the testing apparatus of the present invention can be configured in a compact arrangement by efficiently arranging various components within a given space.
  • This compact arrangement reduces a size of location and space for installing the testing apparatus as well as materials used to manufacture the testing apparatus. Further, since the various components of the testing apparatus are located adjacent to each other when the testing apparatus is operated, it is very easy to observe the situations of the components or to monitor the instruments. As a result, this configuration is very effective for safe operation and optimum performance of the testing apparatus.
  • the testing apparatus In order to test the subject safety valve 48, the testing apparatus is completely flushed, and then the subject safety valve 48 is installed.
  • the air compression systems, electric systems, instrument system, control and supervisory systems, etc. of the testing apparatus are prepared so as to be able to operated.
  • the vent valve 90 of the condensing tank 81 is opened, and then the outflow valve 102 of the water-supply treatment system 101 is opened. Thereby, the condensing tank 81 is filled with water to a predetermined water level (S210). After the condensing tank 81 is filled with water, the vent valve 90 of the condensing tank 81 and the outflow valve 102 of the water-supply treatment system 101 are closed.
  • the vent valve 90 of the condensing tank 81 is opened, and the inflow and outflow valves 112 and 115 of the water-supply pump are opened.
  • the pressure control valves 42 and 43 for the test vessel and their upstream shut-off valves 51 and 52, and the drain valve 68 for the test vessel and its upstream shut-off valve 67, and the shut-off valve 85 for the condensate water collecting pipe are all opened.
  • the drain valve 68 for the test vessel and its upstream shut-off valve 67 are closed (S220). It is checked whether or not the water of the condensing tank 81 reaches a predetermined water level. If the condensing tank 81 is short of water, the condensing tank 81 is additionally filled with water using the water-supply treatment system 101 as described above.
  • a temporary hose is connected between the water-supply treatment system 101 and the drain valve 57 for the loop seal.
  • a drain valve 57-1 for continuously draining the water from the loop seal is closed, and a drain valve 44-1 for the test vessel is opened. Then, the drain valve 57 for the loop seal is opened. Thereby, the loop seal 47 is filled with water from the water-supply treatment system 101.
  • the drain valve 57 for the loop seal and the drain valve 44-1 for the test vessel are closed.
  • the steam is accumulated and pressurized in the accumulator 21 and the test vessel 41 when the loop seal 47 is filled with water.
  • the subject safety valve 48 is tested using a pressurizing force of the water.
  • the water of the loop seal 47 should be discharged to the discharge pipe 82 through the subject safety valve 48 for the subject safety valve 48 to be opened by the pressure of the steam.
  • the steam is condensed into water in the test vessel pressurization pipe 35 connected to the upper portion of the accumulator 21 and the test vessel 41.
  • the condensate water drain valve 64 of the pressurization pipe 35, the drain valve 67 of the test vessel, and the shut-off valve 85 for the condensate water collecting pipe are opened.
  • the electric heater 22 of the accumulator 21 heats the water to produce steam (S230).
  • steam is starting to be produced from the accumulator 21, the steam is introduced and accumulated in the upper portion of the accumulator 21 and the test vessel 41 connected with the accumulator. While the steam is accumulated, the temperatures and pressures of the accumulator 21 and test vessel 41 are increased, and can be checked by the temperature gauge 24 and 25 and the pressure gauge 26 installed on the accumulator 21 and by the temperature gauge 50 and the pressure gauge 49 installed on the test vessel 41.
  • the water of the accumulator 21 continues to be heated by using the electric heater, and thus the pressures of the accumulator 21 and the test vessel 41 are increased to predetermined pressures (e.g. 160 kg/cm 2 if the opening pressure of the subject safety valve is 175 kg/cm 2 ) (S240).
  • predetermined pressures e.g. 160 kg/cm 2 if the opening pressure of the subject safety valve is 175 kg/cm 2
  • the preheating valve 59 of the test vessel 41 is intermittently opened to allow the high-temperature steam of the accumulator 21 to be discharged through the test vessel 41 such that the accumulator 21 and the test vessel 41 are heated at the same time.
  • the test vessel 41 and their pipes the water is heated within a predetermined rate of temperature increase (or a predetermined heating rate).
  • the operation of the electric heater is stopped for a while, and then the accumulator 21 is filled with the water of the condensing tank 81 to a predetermined water level as described above.
  • the first pressure control valve 42 of the pressurization pipe and its upstream shut-off valve 51 are closed, and the second pressure control valve 43 is regulated so as to constantly control the pressure of the test vessel 41.
  • the electric heater of the accumulator 21 continues to be operated such that the steam required for testing the subject safety valve 48 is accumulated to a predetermined pressure in the accumulator 21 (e.g. 185 kg/cm 2 if the opening pressure of the subject safety valve 48 is 175 kg/cm 2 ).
  • the drain valve 57-1 of the loop seal 47 is opened such that the loop seal 47 is filled with the steam, and then the pressure of the test vessel 41 is gradually increased (e.g. at a pressurization rate of 2 psi/sec or less) using the second pressure control valve 43 until the subject safety valve 48 is operated.
  • the pressure and its associated data are measured when the subject safety valve 48 is operated (S250).
  • the test vessel 41 is kept under predetermined pressure using the second pressure control valve 43.
  • the seat tightness test of the subject safety valve 48 is performed.
  • the seat tightness of the subject safety valve 48 is checked by measuring the temperature of the outlet port of the subject safety valve or visually observing the outlet port of the subject safety valve.
  • the test vessel 41 is kept under a predetermined pressure (e.g. 160 kg/cm 2 if the opening pressure of the subject safety valve is 175 kg/cm 2 ), and the accumulator 21 accumulates the steam to a predetermined pressure (e.g. 200 kg/cm 2 ) at which the steam required for testing the subject safety valve is collected.
  • a predetermined pressure e.g. 160 kg/cm 2 if the opening pressure of the subject safety valve is 175 kg/cm 2
  • the accumulator 21 accumulates the steam to a predetermined pressure (e.g. 200 kg/cm 2 ) at which the steam required for testing the subject safety valve is collected.
  • the first pressure control valve 42 is opened at a high speed or at a predetermined speed, thereby providing required pressurization rate or steam flow rate to the subject safety valve 48.
  • the associated data are measured when the subject safety valve 48 is operated.
  • the cooling is preferably natural cooling. Further, the cooling is carried out within a predetermined cooling rate range in order to minimize the thermal stress.
  • an apparatus and method for testing the performance of a safety valve perform tests under the same operation conditions as a pressurizer safety valve installed on a reactor coolant system of a nuclear power plant, so that the tests can be performed with precision, which is advantageous to the industrial application.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Testing Of Devices, Machine Parts, Or Other Structures Thereof (AREA)
  • Details Of Valves (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

L'invention porte sur un appareil et sur un procédé pour le test de la performance d'une soupape de sécurité, lesquels réalisent des tests dans les mêmes conditions de fonctionnement qu'une soupape de sécurité de pressuriseur installée sur un système de refroidissement de réacteur d'une centrale nucléaire. L'appareil pour tester la performance d'une soupape de sécurité, c'est-à-dire, pour réaliser un test de pression déterminé, un test d'étanchéité de siège, un test de débit, un test de purge, un test de décharge d'eau d'une boucle d'étanchéité, un test de charge et de décharge, etc. sur la soupape de sécurité, comprend un accumulateur 21 comprenant au moins un élément chauffant électrique 22 pour chauffer une quantité prédéterminée d'eau remplie dans celui-ci, et stockant de la vapeur produite par l'élément chauffant électrique 22 sous haute pression, et une cuve de test 41 stockant la vapeur délivrée à partir de l'accumulateur 21 sous haute pression, et offrant une pression de test à une soupape de sécurité 48 objet du test, la vapeur étant délivrée après que le débit et la pression de celle-ci aient été commandés, un réservoir de condensation 81 stockant de l'eau déminéralisée devant être délivrée à l'accumulateur 21, et condensant et collectant la vapeur déchargée à partir de la soupape de sécurité 48 objet du test, et une pompe d'alimentation en eau 111 délivrant l'eau stockée dans le réservoir de condensation 81 à l'accumulateur 21.
PCT/KR2009/000040 2008-11-24 2009-01-06 Appareil et procédé de test pour soupape de sécurité Ceased WO2010058880A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2010539315A JP5081982B2 (ja) 2008-11-24 2009-01-06 安全弁の性能試験装置及び試験方法
CN2009801071571A CN101960280B (zh) 2008-11-24 2009-01-06 用于安全阀的测试设备和方法
US12/811,834 US8499610B2 (en) 2008-11-24 2009-01-06 Test apparatus and method for safety valve

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0116753 2008-11-24
KR1020080116753A KR100909443B1 (ko) 2008-11-24 2008-11-24 안전밸브 성능시험장치 및 시험방법

Publications (1)

Publication Number Publication Date
WO2010058880A1 true WO2010058880A1 (fr) 2010-05-27

Family

ID=41337981

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/KR2009/000040 Ceased WO2010058880A1 (fr) 2008-11-24 2009-01-06 Appareil et procédé de test pour soupape de sécurité

Country Status (5)

Country Link
US (1) US8499610B2 (fr)
JP (1) JP5081982B2 (fr)
KR (1) KR100909443B1 (fr)
CN (1) CN101960280B (fr)
WO (1) WO2010058880A1 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519662A (zh) * 2011-12-23 2012-06-27 西安航天动力研究所 一种感压控制阀的设定压力测定系统及方法
CN103076167A (zh) * 2013-01-08 2013-05-01 中国人民解放军国防科学技术大学 先导式安全阀贮存寿命加速试验方法
CN103808504A (zh) * 2014-02-28 2014-05-21 成都大漠石油机械有限公司 一种耐低温实验的系统
CN105488324A (zh) * 2014-10-13 2016-04-13 中广核工程有限公司 一种核电厂给水加热器安全阀选型方法及系统
WO2019019269A1 (fr) * 2017-07-26 2019-01-31 广船国际有限公司 Tuyau de traçage à la vapeur de type à bride et son procédé de montage

Families Citing this family (66)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100982029B1 (ko) 2008-12-15 2010-09-14 한전케이피에스 주식회사 가압기 분무밸브 테스트 벤치
KR101107037B1 (ko) 2010-09-30 2012-01-25 한국수력원자력 주식회사 동력구동밸브의 단부하중 시험장치
KR101256719B1 (ko) * 2010-10-13 2013-04-19 한국수력원자력 주식회사 압력방출밸브 부가배압 시험장치 및 이를 위한 방법
KR101463433B1 (ko) * 2011-12-29 2014-11-20 두산중공업 주식회사 증기발생기 배관 파단 모의실험 방법 및 장치
CN102721539B (zh) * 2012-06-26 2016-07-06 深圳市特种设备安全检验研究院 安全阀热态型式试验装置
CN102788692B (zh) * 2012-07-17 2016-01-20 浙江石化阀门有限公司 超高温热阀的热态密封试验方法
KR101282602B1 (ko) * 2012-09-26 2013-07-12 한국기계연구원 원자력발전소의 증기계통 밸브성능 시험장치용 밀폐형 증기공급장치
CN103852245B (zh) * 2012-12-04 2016-09-14 华东理工大学 一种测试安全阀热态机械性能的试验装置及试验方法
KR101282605B1 (ko) 2012-12-13 2013-07-12 한국기계연구원 원자력발전소의 증기계통 밸브성능 시험장치용 증기공급장치
KR101282600B1 (ko) * 2012-12-18 2013-07-12 한국기계연구원 원자력발전소의 안전밸브 밸브성능 시험장치용 제어밸브 개폐장치
KR101308863B1 (ko) 2012-12-18 2013-09-13 한국기계연구원 원자력발전소의 증기계통 밸브성능 시험장치용 포화증기 공급시스템
KR101476786B1 (ko) * 2012-12-31 2014-12-26 충남대학교산학협력단 고압가스 저장/공급 설비 성능 시험 시스템
KR101390884B1 (ko) 2013-04-10 2014-05-02 한국수력원자력 주식회사 체크밸브 역류시험장치 및 방법
KR101511249B1 (ko) 2013-11-26 2015-04-13 한전케이피에스 주식회사 안전밸브 성능 시험방법
CN103808503B (zh) * 2014-02-24 2016-08-24 华东理工大学 一种测试蒸汽安全阀排量的试验装置及试验方法
CN105628353A (zh) * 2014-11-04 2016-06-01 上海上汽马瑞利动力总成有限公司 一种法兰爆破压力测试结构及测试方法
CN104502075B (zh) * 2014-12-03 2017-08-25 余姚市三力信电磁阀有限公司 安全的检测蒸汽电磁阀的方法
KR101580129B1 (ko) * 2014-12-12 2015-12-28 주식회사 대흥이엔텍 안전밸브 성능 테스트 시스템
CN104949732A (zh) * 2015-06-12 2015-09-30 中国核电工程有限公司 设备冷却水系统波动箱液位测量装置
KR101627482B1 (ko) * 2016-01-08 2016-06-03 한양밸브공업 주식회사 디스크밸브의 내열성과 기밀성 시험장치 및 그 시험장치를 이용한 디스크밸브의 내열성과 기밀성 시험방법
CN105698728B (zh) * 2016-03-31 2016-12-21 合肥通用机械研究院 一种安全阀检测工装
CN105842616B (zh) * 2016-03-31 2018-07-31 北京康斯特仪表科技股份有限公司 一种变速率逼近检测压力开关切换值的装置及方法
CN105785263B (zh) * 2016-03-31 2018-07-31 北京康斯特仪表科技股份有限公司 变速率逼近检测压力开关切换值的方法及装置
CN105738219B (zh) * 2016-04-11 2018-07-13 中国化学工程第十一建设有限公司 一种管道试压系统及方法
CN105952964B (zh) * 2016-06-23 2018-05-08 上海中船三井造船柴油机有限公司 用于气动三通合流调节阀的高温高压测试台及测试方法
CN106323609B (zh) * 2016-08-08 2018-06-05 东北石油大学 过热液体超压泄放实验装置
CN106500980B (zh) * 2016-11-24 2018-09-11 中国核动力研究设计院 以水为工质的稳压器安全阀动作性能试验系统及试验方法
KR101856464B1 (ko) 2016-12-12 2018-05-11 한전원자력연료 주식회사 압력용기 내부 온도 유지 장치
KR101840677B1 (ko) * 2017-02-09 2018-03-22 한전케이피에스 주식회사 원자로 격납건물의 격리밸브 누설률 시험장비 및 이를 이용한 시험방법
KR102078193B1 (ko) 2017-12-28 2020-02-19 한국기계연구원 원전기기의 유동차단 시험용 제어 시스템 및 이를 이용한 원전기기의 유동차단 시험 제어 방법
CN110031242A (zh) * 2018-01-11 2019-07-19 中广核研究院有限公司 防沉积试验水池及杂质试验装置
US10663988B2 (en) 2018-03-26 2020-05-26 Saudi Arabian Oil Company High integrity protection system for hydrocarbon flow lines
CN108318239B (zh) * 2018-04-02 2024-08-06 浙江省太阳能产品质量检验中心 用于太阳能水箱pt阀的测试系统
CN109520722B (zh) * 2018-11-23 2024-12-17 格力电器（武汉）有限公司 安全阀泄压性能测试系统及方法
CN109752153B (zh) * 2018-11-30 2023-11-03 西门子能源变压器(武汉)有限公司 打压缓冲罐和电力变压器的打压试验方法
KR101998395B1 (ko) * 2018-12-28 2019-07-09 한국가스안전공사 초고압용기 반복 가압 시험용 고속 대용량 유량 측정장치
CN109444025B (zh) * 2018-12-30 2024-06-07 隆昌市碧檀陶瓷有限公司 一种酒坛防渗压力测试系统及测试方法
CN109724789B (zh) * 2019-01-22 2023-10-24 华电通用轻型燃机设备有限公司 航改型燃气轮机燃料喷嘴流量测试方法
CN109655254A (zh) * 2019-02-22 2019-04-19 美钻深海能源科技研发（上海）有限公司 一种水下采油树的装备模块爆破性能检测方法及装置
CN109813545A (zh) * 2019-03-13 2019-05-28 西安热工研究院有限公司 针对运行状态压力容器及管道安全阀进行离线校验的系统及方法
KR102198689B1 (ko) * 2019-03-27 2021-01-05 (주)다흥 안전밸브 성능시험 측정장치
CN110208103B (zh) * 2019-06-21 2021-10-15 哈电集团（秦皇岛）重型装备有限公司 一种压力容器水压试验连接控制装置及方法
KR102076457B1 (ko) * 2019-09-16 2020-02-11 한전케이피에스 주식회사 중앙 냉동기 압축기용 전동기 가압 누설시험 장치
CN110823461B (zh) * 2019-11-27 2024-11-22 深圳市质量安全检验检测研究院 安全阀检验装置
JP2021177132A (ja) * 2020-05-07 2021-11-11 ダフン イエヌジー カンパニー リミテッドDaheung Eng Co., Ltd. 安全弁の性能試験測定装置
CN112304779A (zh) * 2020-11-18 2021-02-02 西安热工研究院有限公司 一种电站用高温高压管材服役性能在线试验装置
US20240027098A1 (en) * 2020-12-03 2024-01-25 Hc Thermal Llc Multi-pass heater
CN112729717A (zh) * 2020-12-11 2021-04-30 南京睿实消防安全设备有限公司 一种细水雾多阀组循环测试工装及测试方法
CN113776817B (zh) * 2021-08-11 2023-08-04 浙江蓝箭航天空间科技有限公司 一种用于超低温液体火箭发动机调节阀的校准系统和方法
KR102592739B1 (ko) * 2021-09-14 2023-10-20 한국수력원자력 주식회사 원자로냉각계통 누설측정 시스템
US11713847B2 (en) 2021-09-16 2023-08-01 Imperium Technologies, LLC Steam trap
CN116007861A (zh) * 2021-10-22 2023-04-25 中核核电运行管理有限公司 一种先导式安全阀活塞密封性能测量装置
CN116067642A (zh) * 2021-10-29 2023-05-05 上海汽车集团股份有限公司 自动变速箱阀体测试系统及方法
CN114459750B (zh) * 2022-02-15 2024-07-23 北京微焓科技有限公司 测试方法及特斯拉阀门
CN115326380A (zh) * 2022-08-09 2022-11-11 中广核工程有限公司 一种阀门用蒸汽热态试验装置
CN115419741B (zh) * 2022-09-02 2025-06-27 国家石油天然气管网集团有限公司 用于气液执行机构的控制方法、处理器、装置及存储介质
CN115479766B (zh) * 2022-09-22 2025-02-14 中国核动力研究设计院 一种多阀门管路温度循环可靠性试验系统及方法
CN115615689B (zh) * 2022-10-21 2025-08-05 深圳市特种设备安全检验研究院 蒸汽疏水阀性能试验装置
CN115683883B (zh) * 2022-11-14 2025-12-05 重庆帅豪机械有限公司 一种用于空冷器试压的特高压测试装置及方法
CN116007863B (zh) * 2022-12-09 2025-06-17 哈电发电设备国家工程研究中心有限公司 一种汽轮机阀门漏气导致飞车风险的分析方法、电子设备及存储介质
CN116046377B (zh) * 2022-12-30 2024-08-20 北京天兵科技有限公司 火箭氧保险阀启闭性能试验系统及试验方法
CN116202878B (zh) * 2023-01-29 2023-10-20 中国特种设备检测研究院 一种单向阀气压耐用性测试装置
CN116429408B (zh) * 2023-02-21 2025-11-25 江苏亿阀股份有限公司 一种低温高压阀门交变载荷冲击测试系统及方法
CN115931342B (zh) * 2023-03-15 2023-05-16 合肥通用机械研究院有限公司 一种用于安全阀的综合试验台及综合测试方法
CN118549040B (zh) * 2024-07-23 2024-09-24 自贡工业阀门制造有限公司 一种阀门检测设备及其使用方法
CN118857609A (zh) * 2024-07-31 2024-10-29 西安特种设备检验检测院 一种用于二氧化碳介质的安全泄放阀校验装置

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893494A (en) * 1988-03-31 1990-01-16 Management Services International, Inc. Method and system for testing safety relief valves
JP2001165812A (ja) * 1999-12-13 2001-06-22 Hitachi Ltd 安全弁試験方法及び安全弁試験装置
KR20040059526A (ko) * 2002-12-27 2004-07-06 한전기공주식회사 가압기 안전밸브의 누설 및 압력설정 시험장치
KR20050069686A (ko) * 2003-12-31 2005-07-05 한국수력원자력 주식회사 유압밸브 성능 시험 장치 및 방법

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS55155971A (en) * 1979-05-21 1980-12-04 Kawasaki Heavy Ind Ltd Safety valve tester
JPS5889662U (ja) * 1981-12-11 1983-06-17 東亜バルブ株式会社 高温、高圧用安全弁の蒸気による吹出し圧力確認装置
US4588548A (en) * 1984-06-19 1986-05-13 Westinghouse Electric Corp. Pressurizer passive steam relief and quench spray system
US4989840A (en) * 1989-11-08 1991-02-05 Union Carbide Canada Limited Controlling high humidity atmospheres in furnace main body
KR100311775B1 (ko) 1998-12-31 2002-04-24 김형국 안전밸브시험장치
CN2392927Y (zh) * 1999-05-10 2000-08-23 郭俊杰 高低压气体安全阀校验台
CN2789749Y (zh) * 2005-01-28 2006-06-21 王元清 安全阀调试装置
CN201000397Y (zh) * 2006-10-31 2008-01-02 王春年 高温蒸汽与常温气体及水三相介质安全阀校验台

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4893494A (en) * 1988-03-31 1990-01-16 Management Services International, Inc. Method and system for testing safety relief valves
JP2001165812A (ja) * 1999-12-13 2001-06-22 Hitachi Ltd 安全弁試験方法及び安全弁試験装置
KR20040059526A (ko) * 2002-12-27 2004-07-06 한전기공주식회사 가압기 안전밸브의 누설 및 압력설정 시험장치
KR20050069686A (ko) * 2003-12-31 2005-07-05 한국수력원자력 주식회사 유압밸브 성능 시험 장치 및 방법

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102519662A (zh) * 2011-12-23 2012-06-27 西安航天动力研究所 一种感压控制阀的设定压力测定系统及方法
CN103076167A (zh) * 2013-01-08 2013-05-01 中国人民解放军国防科学技术大学 先导式安全阀贮存寿命加速试验方法
CN103076167B (zh) * 2013-01-08 2014-05-14 中国人民解放军国防科学技术大学 先导式安全阀贮存寿命加速试验方法
CN103808504A (zh) * 2014-02-28 2014-05-21 成都大漠石油机械有限公司 一种耐低温实验的系统
CN105488324A (zh) * 2014-10-13 2016-04-13 中广核工程有限公司 一种核电厂给水加热器安全阀选型方法及系统
WO2019019269A1 (fr) * 2017-07-26 2019-01-31 广船国际有限公司 Tuyau de traçage à la vapeur de type à bride et son procédé de montage

Also Published As

Publication number Publication date
US8499610B2 (en) 2013-08-06
JP5081982B2 (ja) 2012-11-28
CN101960280B (zh) 2012-09-19
JP2011506997A (ja) 2011-03-03
CN101960280A (zh) 2011-01-26
US20100281954A1 (en) 2010-11-11
KR100909443B1 (ko) 2009-07-30

Similar Documents

Publication Publication Date Title
WO2010058880A1 (fr) Appareil et procédé de test pour soupape de sécurité
US5438862A (en) System and method for in situ testing of the leak-tightness of a tubular member
US4694693A (en) Check valve test method using truncated accumulator blowdown
CN109841289A (zh) 用于安全壳热量非能动导出系统的试验装置
CN113176046A (zh) 多试件高温高压密封元件性能试验装置及试验方法
US3721116A (en) Method for detecting steam leakage in a heat exchanger having circulation tubes surrounded by liquid sodium and devices for the application of said method
CN118010262B (zh) Ⅳ型储氢容器内胆多级压力氢气渗透测试装备及方法
CN102345591B (zh) 一种保压检修密封实验台
CN215004133U (zh) 多试件高温高压密封元件性能试验装置
CN208736633U (zh) 一种安全阀冷态试验系统
GB2175374A (en) Check valve test method using truncated accumulator blowdown
CN111693085A (zh) 一种高温高压传感器性能试验装置及其使用方法
JP5463727B2 (ja) 復水器冷却管漏洩検査装置
CN109273120B (zh) 一种紧凑型小型核反应堆冷段温度测量方法
EP0727651B1 (fr) Système et méthode d'essai sur place de l'étanchéité d'un membre tubulaire
CN110610770A (zh) 一种压水堆核电厂安注箱自动隔离系统以及方法
CN205538123U (zh) 核电站安全专用系统泵组温度探头的密封性试验装置
CN113654016B (zh) 一种蒸汽发生器的蒸汽发生组件、泄漏检测方法及装置
CN116718481A (zh) 一种汽缸耐压连续实时检测分析记录系统
CN111521352A (zh) 一种核电站机组逆止阀密封性检测和异常处理方法
JP3077749B2 (ja) 熱交換器の漏洩管同定方法
US10157688B2 (en) Nuclear grade air accumulating, isolating, indicating and venting device
JP6754721B2 (ja) 蒸気系水位検出装置
CN117972990B (zh) 一种核电应急柴油机冷却水膨胀节寿期评估方法
CN219455474U (zh) 一种高温高压阀门失水试验系统

Legal Events

Date Code Title Description
WWE Wipo information: entry into national phase

Ref document number: 200980107157.1

Country of ref document: CN

WWE Wipo information: entry into national phase

Ref document number: 2010539315

Country of ref document: JP

WWE Wipo information: entry into national phase

Ref document number: 12811834

Country of ref document: US

121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 09827646

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 09827646

Country of ref document: EP

Kind code of ref document: A1