JPH08226888A - Structure inspection device - Google Patents

Abstract

PURPOSE: To measure while a predetermined local part of a test body is kept at a high temperature and a high pressure and the water environment is maintained under predetermined conditions, by mounting a measuring means at a part of the test body of a structure and locally measuring properties of the test body. CONSTITUTION: A container 11 of a measuring means 10 has a cylindrical main body 11a and a flange 11b. The flange 11b is held in touch with one side face of a test body 1, so that the interior of the container 11 is in a sealed state by a supporting ring 12 and a packing 13. A clamping means 20 at the other side face of the test body 1 holds the test body 1 with a predetermined pressure along with the container 11 by a contact member 21 and a driving means 22. Moreover, an environment-setting means 30 set at the container 11 sets the interior of the container 11 at a high temperature and a high pressure to bring a measuring part of the test body 1 under predetermined environmental conditions. Further, the water having the pressure, temperature, flow velocity, etc., restricted is supplied from a water inlet/outlet 30a to the measuring part of the test body 1 thereby to maintain the water environment at predetermined conditions. A properties-detecting means set in the container 11 measures properties of the test body 1, e.g. whether a crack is generated or the crack grows, etc., electrically, mechanically or optically.

Description

Detailed Description of the Invention

[0001]

The present invention relates to the property of a structure at high temperature,
The present invention relates to improvement of a structure inspection device for measurement under an environment such as high pressure.

[0002]

2. Description of the Related Art In general, when grasping material behavior in high-temperature high-pressure water of a light water reactor structure or the like, it is necessary to grasp local behavior of the structure, for example, crack initiation and growth.

Conventionally, in this type of inspection apparatus, a test body for a structure, a chuck for holding the test body, and a load applying section for applying a load to the test body are all placed in an autoclave, and the autoclave is used. The properties such as cracks of the test body were inspected by maintaining the same high temperature and high pressure conditions as the environmental conditions.

[0004]

However, in the prior art as described above, since the test body, the load-bearing part and the like are housed in the autoclave, the capacity of the tester, the load loader and the like are larger than those required for the test. Environmental water must be prepared,
Further, there is a drawback in that it is necessary to perform an extremely inefficient operation of supplying this environmental water to the autoclave at high temperature and high pressure. Further, in such a system, basically, the first class pressure vessel of the Industrial Safety and Health Law must be regulated, and the inspection work may not be performed smoothly and quickly.

On the other hand, in recent years, it has become necessary to diversify test conditions. For example, the flow velocity of environmental water is increased, and the influence of the local water environment of the structure is grasped.

In order to meet the demand for such diversification, there is a problem that the autoclave, the water environment manufacturing apparatus, the water circulating apparatus, the purifying apparatus and the like are further increased in size in the above-mentioned conventional techniques, and the predetermined size of the test body is not satisfied. It becomes impossible to manage water locally, and it is not possible to expect to maintain the test accuracy.

SUMMARY OF THE INVENTION An object of the present invention is to provide a structure inspection apparatus capable of improving the above-mentioned drawbacks of the prior art and sufficiently satisfying the above-mentioned diversification demands.

[0008]

In order to achieve the above-mentioned object of the present invention, in the present invention, the measuring means for measuring the property of the structure is attached to a part of the test body of the structure, and the property of the test body is measured. Is locally measured.

[0009]

Function: A predetermined local portion of the test body is kept at high temperature and high pressure, and the water environment such as the flow velocity of water is maintained under a predetermined condition to locally measure the property of the test body.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Referring to FIGS. 1 and 2, there is shown a structure inspection apparatus according to the present invention.

This structure inspection apparatus has a measuring means 1 arranged on one side of a test body 1 of a structure to be measured and arranged on a part of the test body.
It has 0. The test body 1 is supported by the upper chuck portion 2 and the lower chuck portion 3. The lower chuck part 3 is provided with a load applying part.

The measuring means 10 comprises a container 1 in the illustrated embodiment.
One. It should be noted that this container 11 is arranged in a part of the test body 1. This container has a cylindrical main body 11a having an opening on one side and a flange 11b provided around the opening of the main body. This container is arranged with the flange 11b abutting on one side surface of the test body 1. A support ring 12 and a packing 13 are arranged between the flange 11b of the container and the test body 1 in order to make the inside of the container airtight.

In the embodiment shown, the clamping means 20 is arranged on the opposite side of the container 11, ie on the other side of the test body 1. This tightening means holds the test body 1 between the container and the container at a predetermined pressure, and the contact member 21 arranged on the other side surface of the test body 1 and the driving means 22 for pressing the contact member against the test body 1. Have and. This drive means is composed of, for example, a hydraulic or electric cylinder 23. The piston 23a of this cylinder is attached to the flange 11b of the container 11, as shown in FIG.

The container 11 is provided with an environment setting means 30 and a property detecting means 40.

The environment setting means 30 is for setting the inside of the container to a high temperature and a high pressure so that the portion of the test body 1 to be measured (inspected) is subjected to predetermined environmental conditions such as a high temperature and a high pressure. The environment setting means can also set various environments such as the flow velocity of a fluid such as water to be brought into contact with the test body 1, the water pressure, the water temperature, and the water quality. This is necessary for grasping the local behavior of the structure, for example, the initiation and growth of cracks, when grasping the material behavior in the high temperature and high pressure water of the light water reactor structure or the like. That is,
In a light water reactor plant or other plant, in order to inspect for cracks in structural members that come into contact with high temperature and high pressure water during operation, high temperature and high pressure water are created in the container, and certain water environmental conditions such as water quality, water pressure, water temperature are established. Alternatively, the water whose flow rate is controlled is supplied toward the portion of the test body to be measured. FIG. 1 shows a water inlet / outlet port 30a of the environment setting means 30.

The container 11 is also provided with a property detecting means 40 for detecting the properties of the test body 1, for example, the cracks that occur and their growth (time change). The property detecting means is configured to electrically, mechanically, or optically measure, for example, a water environment or a crack-like change.
FIG. 2 shows a lead wire 41 for taking out this measured value to the outside of the container.

Referring again to the tightening means 20, the contact member 21 comprises a ceramic plate 21a, which is a high-strength insulating material that comes into contact with the surface of the test body 1, and a support arranged between the ceramic plate and the driving means 22. And a ball 21b. The tightening means 20 can hold the water pressure of the water environment in the container.

The reason why the ceramic plate and the supporting balls are interposed is to keep the restraining force of the test body constant and to avoid an abnormal strain due to the deformation of the test body.

It should be noted that the measuring means is arranged on one side of the test body and the tightening means is arranged on the other side of the test body in the above embodiment, but the measuring means is arranged on both sides of the test body. It can also be held. In this case, it is effective when the test body having a crack penetrating it or both surfaces of the test body are set under different water environment conditions.

[0021]

According to the present invention, in the test for grasping the crack phenomenon of the structure in the high temperature and high pressure water, not only the local water environment can be set but also the accuracy of the test condition can be improved. Furthermore, the miniaturization of the device has made it possible to carry out tests that are easy to handle and easy to manage.

It has been confirmed by a long-term test carried out by making a prototype of the device that these various characteristics are good, and the test also has a harmful effect on the test such as a change in stress distribution on the test body due to tightening. It was also confirmed that there was no.

[Brief description of drawings]

FIG. 1 is a schematic side view showing a structure testing apparatus according to the present invention in a partial cross section.

FIG. 2 is a plan view of FIG.

[Explanation of symbols]

1: Test body 10: Measuring means 11: Container 20: Tightening means 30: Environment setting means 40:
Property detection means

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Masaaki Yokoi 43-28 Fukadadai, Yokosuka City, Kanagawa Prefecture

Claims (5)

[Claims] 1. A measuring means for measuring the property of a structure under the same environmental condition is attached to a part of a test body of the structure, and the property of the structure is measured by the measuring means. Structure inspection device. 2. A container in which the measuring means is hermetically attached to a part of a test body of a structure, an environment setting means provided in the container for applying an environment such as high temperature and high pressure to the test body, and a test. The structure inspection device according to claim 1, further comprising a property detection unit provided in the container for detecting a property of a body. 3. The structure inspection apparatus according to claim 1, further comprising tightening means for attaching the measuring means to the test body. 4. The structure inspection apparatus according to claim 1, wherein the measuring means is arranged on both sides of the test body. 5. The measuring means is arranged on one side of the test body, and the tightening means is arranged on the other side of the test body.
The structure inspection device described.