SE419006B - COOKER REACTOR WITH DIFFUSER IN FUEL CARTRIDGES - Google Patents
COOKER REACTOR WITH DIFFUSER IN FUEL CARTRIDGESInfo
- Publication number
- SE419006B SE419006B SE7908959A SE7908959A SE419006B SE 419006 B SE419006 B SE 419006B SE 7908959 A SE7908959 A SE 7908959A SE 7908959 A SE7908959 A SE 7908959A SE 419006 B SE419006 B SE 419006B
- Authority
- SE
- Sweden
- Prior art keywords
- fuel
- bore
- cartridge
- fuel assembly
- diffuser
- Prior art date
Links
- 239000000446 fuel Substances 0.000 title claims description 32
- 239000000498 cooling water Substances 0.000 claims description 9
- 230000000712 assembly Effects 0.000 claims description 3
- 238000000429 assembly Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 claims description 2
- 238000005553 drilling Methods 0.000 claims 1
- 239000000945 filler Substances 0.000 claims 1
- 238000007373 indentation Methods 0.000 claims 1
- 230000000694 effects Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000010276 construction Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C3/00—Reactor fuel elements and their assemblies; Selection of substances for use as reactor fuel elements
- G21C3/30—Assemblies of a number of fuel elements in the form of a rigid unit
- G21C3/32—Bundles of parallel pin-, rod-, or tube-shaped fuel elements
- G21C3/322—Means to influence the coolant flow through or around the bundles
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C5/00—Moderator or core structure; Selection of materials for use as moderator
- G21C5/02—Details
- G21C5/06—Means for locating or supporting fuel elements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
- Fuel Cell (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Description
rnaíäšëfiis' 55 f_.--.......... .U-a-n-...tm .-.-..f..,-.«.. »..._...-~... ,. -...»........- Enligt uppfinningen är bränslepatronens hottenenhet, som anslutas till patronuppställningsplattan mitt över en strgypöppnizzg utformad som en diffusor som minskar strypöppningens strypningseffekt och därmed tryck- fallet över strypöppningen och bottenenneten. Xylvattonflödet ökar då och kan på lämpligt sätt påverkas genom utformningen av diffusom. Ändringen av kylvattenflödet kräver därför ej som hittills utbyte av en strypbricka i patronuppställningsplattan. Uppfinningen gör det möjligt att minska ' strypeffekteu ooh därmed påverka kylvattenflödet på. önskat sätt även när patronuppstëllziingsplatten är utförd med fasta strypöppningar, vilket inne- bär en väsentlig förenkling av konstruktionen. rnaíäšë fi is' 55 f _. - .......... .Uan -... tm.-.- .. f .., -. «..» ..._...- ~. ..,. -... »........- According to the invention, the hot unit of the fuel assembly, which is connected to the cartridge mounting plate in the middle of a spray opening, is designed as a diffuser which reduces the throttling effect of the throttle opening and thus the pressure drop across the throttle opening and the bottom net. The xylvatton flow then increases and can be suitably affected by the design of the diffuser. The change in the cooling water flow therefore does not require, as hitherto, the replacement of a throttle washer in the cartridge mounting plate. The invention makes it possible to reduce the throttling effect and thereby affect the cooling water flow. desired manner even when the cartridge stand plate is made with fixed throttle openings, which means a significant simplification of the construction.
Bränslepatronens bottenenhet skjuter på. känt sätt ned i en styrning, som vanligen består av* en urborrning, som är koaxiell med strypöpprxingen.The bottom assembly of the fuel assembly pushes on. known method down into a guide, which usually consists of * a bore, which is coaxial with the throttle.
Bränslepatronens bottendel är lämpligen så. utfomad att mellan denna ooh urborzrningen bildas ett ringfonnad kammare och så att mellan bränsle- patronens bottendel och urbormingens botten bildas en spalt. Via denna spalt står den nämnda ringfomsde ksmaren i förbindelse med strömings- kanalen genom uppställningsplattan och bottendelen. Härigenom åstadkommas en trynksäzflniing i den ringfomade kammaren som ger upphov till en nedåt- riktad kraft, som strävar att dra bränslepatronen nedåt. Denna kraft mot- verkar lyftkraften, som uppstår genom strömningsmotstândet i bränslepatro- IIGIBE e Vid uppdelning av en bränslepatrons bränslestavar i ett antal knippen, som omges av var sin bränslebox möjliggör uppfinningen förläggning av en del av strypningen i omedelbar närhet av vatteninloppet till de individuella, paral- lella boxarna inom bränslepatronen. En stzypning, som säkerställer lämplig, företrädesvis jämn fördelning av kylvatten till boxarna möjliggöres. Denna. strypning kan lämpligen anordnas i form av strypöppningar i bottenplattor i boxarna, vilka bottenplattor även kan utgöra en nedre infästning för bränsle- stavarna.The bottom part of the fuel assembly is suitably so. designed to form an annular chamber between this and the bore and so that a gap is formed between the bottom part of the fuel assembly and the bottom of the bore. Via this gap, the said ring-shaped ksmar communicates with the flow channel through the set-up plate and the bottom part. This results in a pressure in the annular chamber which gives rise to a downward force which tends to pull the fuel assembly downwards. This force counteracts the lifting force which arises from the flow resistance in the fuel cartridge. IIGIBE e the parallel boxes within the fuel assembly. A pouring, which ensures suitable, preferably even distribution of cooling water to the boxes, is made possible. This. throttling can suitably be arranged in the form of throttling openings in bottom plates in the boxes, which bottom plates can also form a lower attachment for the fuel rods.
Uppfinningen beskrives nämnare under hänvisning till bifogade figur, som visar ett parti av en patronuppställningsplatta och nedre delen av en bränsle- patron.The invention is further described with reference to the accompanying figure, which shows a portion of a cartridge mounting plate and the lower part of a fuel assembly.
I figuren betecknar 1 en del av en patronuppställningsplatta, som uppbär en bränslehärd. Denna innehåller ett antal bränslepatroner 2, som bildar härden.In the figure, 1 denotes a part of a cartridge arrangement plate which carries a fuel core. This contains a number of fuel assemblies 2, which form the core.
Bränslepatronen innehåller fyra parallella bränsleboxar 3, som upptill är an- slutna till en gemensam semmanhâllande toppenhet och nedtill till en botten- tnhnnw~a~ram-nanm..Aminknouau-»sn-.ahfim--mu. n....,:~v.|.\-|\_,m_., ___-LJ... » =....-.,,._.,,_-,.. m... _. ._ enhet 4. 'Jfoppenhetem boxarna 5 och bottenenheten är sammanfnållrxe. med en icke visad dragstång. Bottenenhetens inströmzningsdel är utformad som venturi- diffusor 5 men den kan naturligtvis även utformas som en stegdiffxxsor. Botten- enhetens nedre del skjuter ned i en urborrning 6 med en konisk yta 7 vid ur- borrningens 6 mynning. 'Bottenenhetens 4 nedre del är utformad med styrning-ar 8 som vid montering av bränslepatronen styr :ln denna i urborrningen 6. Den är också. utformad med en bärring 9 med en konisk yta 10 avsedd att samverka med den koniska ytan 7. I urboirninganza 6 är en strypbricka 11 med en öpp- ning 12 insatt för fördelning av kylvattenflödet över härden på, ett önskat . sätt. Denna strypbricka kan vara utförd så. att den är utbytbsr, men för att . förenkla konstruktionen önskar man utföra urborrningens 6 nedre del 15 som en fast strypning med en lämplig diameter. vid lämpligt val av diffusor 5, minskar totala strömningsmotståndet över strypöppningen 12 och inloppsdelen 4 och ökar då vattenflödet. Trots helt fasta. strypöppninger av samma storlek kan man åstadkomma olika kylvattenflöde i olika. delar av härden. Vanligen är vämeeffekten störst i härdens mittre parti och bör kylflödet här vara större än i härdens randpartier. Mellan urborniingen 6 och det nedskjutaride partiet _ av bottendelen 4 bildas ett ringformigt rum 14. Detta står i förbindelse med strömningskanalen 15 via spalten 16 mellan brickans 11 inre yta 17 och botten- delene 4 nedre ändyta. 18. Härigenom erhålles ett wmdertryck i .rummet 14 så att 'oottendelen 4 kommer att påverkas av en nedátriktad kraft, som komer att mot- verka den uppåtriktade kraft, som strömningsmotståndet i boxarna 5 åstadkommer.The fuel assembly contains four parallel fuel boxes 3, which at the top are connected to a common summing top unit and at the bottom to a bottom- tnhnnw ~ a ~ ram-nanm..Aminknouau- »sn-.ahfim - mu. n ....,: ~ v. |. \ - | \ _, m_., ___- LJ ... »= ....-. ,, ._. ,, _-, .. m .. _. ._ unit 4. 'Jfoppenhetem the boxes 5 and the bottom unit are joined together. with a drawbar not shown. The inflow part of the bottom unit is designed as a venturi diffuser 5, but it can of course also be designed as a step diffuser. The lower part of the bottom unit projects into a bore 6 with a conical surface 7 at the mouth of the bore 6. The lower part of the bottom unit 4 is formed with guides 8 which, when mounting the fuel assembly, guide it into the bore 6. It is also. formed with a support ring 9 with a conical surface 10 intended to cooperate with the conical surface 7. In the urboirninganza 6 a choke washer 11 with an opening 12 is inserted for distributing the cooling water flow over the hearth on, a desired. way. This throttle plate can be made this way. that it is interchangeable, but to. To simplify the construction, it is desired to make the lower part 15 of the bore 6 as a fixed choke with a suitable diameter. with the appropriate choice of diffuser 5, the total flow resistance across the choke opening 12 and the inlet part 4 decreases and then the water flow increases. Despite being completely fixed. throttle openings of the same size, different cooling water flow can be achieved in different. parts of the core. Usually the heat effect is greatest in the middle part of the hearth and the cooling flow here should be greater than in the edge parts of the hearth. Between the bore 6 and the projecting part of the bottom part 4 an annular space 14 is formed. This communicates with the flow channel 15 via the gap 16 between the inner surface 17 of the washer 11 and the lower end surface 4 of the bottom parts 4. 18. This results in a negative pressure in the space 14 so that the outer part 4 will be affected by a downward force which will counteract the upward force which the flow resistance in the boxes 5 produces.
I den visade bränslepatronen är boxarna 5 försedda med enslutningsdelar 20, som skjuter ned i öppningar i bottendelen 4. I och för fördelning av lcylvatten- flödet jämnt mellan de fyra ingående boxarna 5 är stödplattonza 21 för bränsle- stavarna 22 försedda med ett antal öppningar 25, som tillsammans har ett sådant tvärsnitt att en för fördelning av kylvattenflödet lämplig strypning åstadkosmes.In the fuel cartridge shown, the boxes 5 are provided with enclosing parts 20, which project into openings in the bottom part 4. In order to distribute the cylinder water flow evenly between the four included boxes 5, support plates 21 for the fuel rods 22 are provided with a number of openings 25. , which together have such a cross-section that a restriction suitable for distributing the cooling water flow is provided.
Uppfinningen ger väsentligt större utryme för fördelningen av strypningen vid vatteninlöppet i patronuppställningsplattan och i stödplattorna i boxarna 5. 50 Val av strypning dvs kylvattenflöde kan göras genom att välja anslutningsdelar 4 med olika diffusoreffekt. En ändring inom bränslehärden kan genomföras på ett ur hanteringssynpunkt enklare sätt genom att utbyte av strynbricka i pa- tronuppställningsplattan ej erfordras även om ändringen fordrar en ändrad fördelning av kylvattenflödet.The invention provides significantly greater space for the distribution of the choke at the water inlet in the cartridge arrangement plate and in the support plates in the boxes 5. Selection of choke, ie cooling water flow, can be made by selecting connection parts 4 with different diffuser effect. A change within the fuel core can be carried out in a simpler manner from a handling point of view by not replacing the throttle plate in the cartridge mounting plate even if the change requires a changed distribution of the cooling water flow.
Claims (4)
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7908959A SE419006B (en) | 1979-10-30 | 1979-10-30 | COOKER REACTOR WITH DIFFUSER IN FUEL CARTRIDGES |
| DE8080106368T DE3070030D1 (en) | 1979-10-30 | 1980-10-20 | Boiling water reactor |
| EP80106368A EP0027984B1 (en) | 1979-10-30 | 1980-10-20 | Boiling water reactor |
| FI803352A FI69936C (en) | 1979-10-30 | 1980-10-27 | KOKARREAKTOR MED DIFFOSOR I BRAENSLEPATRONER |
| JP15025180A JPS5696295A (en) | 1979-10-30 | 1980-10-28 | Boiling water reactor |
| ES496390A ES496390A0 (en) | 1979-10-30 | 1980-10-29 | BOILING REACTOR |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SE7908959A SE419006B (en) | 1979-10-30 | 1979-10-30 | COOKER REACTOR WITH DIFFUSER IN FUEL CARTRIDGES |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| SE7908959L SE7908959L (en) | 1981-05-01 |
| SE419006B true SE419006B (en) | 1981-07-06 |
Family
ID=20339185
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SE7908959A SE419006B (en) | 1979-10-30 | 1979-10-30 | COOKER REACTOR WITH DIFFUSER IN FUEL CARTRIDGES |
Country Status (6)
| Country | Link |
|---|---|
| EP (1) | EP0027984B1 (en) |
| JP (1) | JPS5696295A (en) |
| DE (1) | DE3070030D1 (en) |
| ES (1) | ES496390A0 (en) |
| FI (1) | FI69936C (en) |
| SE (1) | SE419006B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SE424237B (en) * | 1980-10-29 | 1982-07-05 | Asea Atom Ab | FUEL ELEMENT FOR A COOKING REACTOR |
| US4526745A (en) * | 1981-08-25 | 1985-07-02 | Ab Asea-Atom | Fuel assembly with a water flow separated from the fuel rods |
| US4560532A (en) * | 1982-04-15 | 1985-12-24 | Westinghouse Electric Corp. | Nuclear fuel assembly |
| JPS61284696A (en) * | 1985-06-12 | 1986-12-15 | 株式会社日立製作所 | Reactor |
| US4717529A (en) * | 1986-01-10 | 1988-01-05 | Westinghouse Electric Corp. | Thimble guide assembly |
| DE3723730A1 (en) * | 1987-07-17 | 1989-01-26 | Siemens Ag | Nuclear reactor with a core removably assembled from individual fuel assemblies, and with a liquid coolant |
| US4889684A (en) * | 1988-08-01 | 1989-12-26 | General Electric Company | Hydraulic reinforcement of channel at lower tie-plate in BWR fuel bundle |
| DE4308364A1 (en) * | 1993-03-16 | 1994-09-22 | Siemens Ag | Pressurized water reactor with individually adjusted pressure distribution in the coolant |
| US5383227A (en) * | 1993-08-23 | 1995-01-17 | Siemens Power Corporation | Method for modifying existing transition pieces in bottom entry nuclear fuel assemblies for reducing coolant pressure drop |
| JPH0763866A (en) * | 1993-08-23 | 1995-03-10 | Siemens Power Corp | Nuclear fuel assembly of nuclear reactor |
| EP0878010B1 (en) * | 1996-02-02 | 2001-10-31 | Framatome ANP GmbH | Nuclear fuel assembly having a transition piece with reduced flow resistance |
| DE19843962A1 (en) * | 1998-09-24 | 2000-04-06 | Siemens Ag | Coolant directing unit, for feeding coolant to nuclear reactor fuel element, comprises flow channel and diffuser |
| DE10301351B4 (en) * | 2002-02-09 | 2005-03-03 | Framatome Anp Gmbh | Fuel element of a boiling water reactor |
| JP2012008048A (en) * | 2010-06-25 | 2012-01-12 | Mitsubishi Heavy Ind Ltd | Pressure loss adjustment member and atomic reactor |
| JP2012013436A (en) | 2010-06-29 | 2012-01-19 | Mitsubishi Heavy Ind Ltd | Apparatus for installing pressure loss adjustment member |
| JP2012021855A (en) * | 2010-07-13 | 2012-02-02 | Mitsubishi Heavy Ind Ltd | Pressure drop control member and nuclear reactor |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3389056A (en) * | 1964-07-09 | 1968-06-18 | Westinghouse Electric Corp | Fuel assemblies |
| US3398050A (en) * | 1966-01-07 | 1968-08-20 | Atomic Power Dev Ass Inc | Nuclear reactor system |
| US3401081A (en) * | 1966-04-28 | 1968-09-10 | Allis Chalmers Mfg Co | Hydraulic holddown for nuclear reactor fuel assembly |
| US3671394A (en) * | 1969-12-29 | 1972-06-20 | North American Rockwell | Articulated fuel element housing |
| FR2222731B1 (en) * | 1973-03-22 | 1976-05-21 | Alsthom |
-
1979
- 1979-10-30 SE SE7908959A patent/SE419006B/en not_active IP Right Cessation
-
1980
- 1980-10-20 EP EP80106368A patent/EP0027984B1/en not_active Expired
- 1980-10-20 DE DE8080106368T patent/DE3070030D1/en not_active Expired
- 1980-10-27 FI FI803352A patent/FI69936C/en not_active IP Right Cessation
- 1980-10-28 JP JP15025180A patent/JPS5696295A/en active Granted
- 1980-10-29 ES ES496390A patent/ES496390A0/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| ES8107407A1 (en) | 1981-10-01 |
| FI69936C (en) | 1986-05-26 |
| FI803352L (en) | 1981-05-01 |
| ES496390A0 (en) | 1981-10-01 |
| JPS5696295A (en) | 1981-08-04 |
| EP0027984A2 (en) | 1981-05-06 |
| DE3070030D1 (en) | 1985-03-07 |
| EP0027984B1 (en) | 1985-01-23 |
| FI69936B (en) | 1985-12-31 |
| EP0027984A3 (en) | 1981-10-28 |
| JPS646715B2 (en) | 1989-02-06 |
| SE7908959L (en) | 1981-05-01 |
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