SE465395B - Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor - Google Patents

Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor

Info

Publication number
SE465395B
SE465395B SE9000512A SE9000512A SE465395B SE 465395 B SE465395 B SE 465395B SE 9000512 A SE9000512 A SE 9000512A SE 9000512 A SE9000512 A SE 9000512A SE 465395 B SE465395 B SE 465395B
Authority
SE
Sweden
Prior art keywords
spreader
leg
fuel
nuclear reactor
frame
Prior art date
Application number
SE9000512A
Other languages
Swedish (sv)
Other versions
SE9000512D0 (en
Inventor
I Andersson
Original Assignee
Asea Atom Ab
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 Asea Atom Ab filed Critical Asea Atom Ab
Priority to SE9000512A priority Critical patent/SE465395B/en
Publication of SE9000512D0 publication Critical patent/SE9000512D0/en
Publication of SE465395B publication Critical patent/SE465395B/en

Links

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
    • G21C3/34—Spacer grids
    • G21C3/3424—Fabrication of spacer grids
    • 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

Abstract

The invention relates to a spreader 4 for holding together elongate fuel rods in a bundle which forms a fuel cartridge. The spreader 4 comprises a number of cells 5 surrounded by a rectangular frame 6. According to the invention, the frame 6 is formed from four essentially L-shaped strip elements 7 welded together with one another. <IMAGE>

Description

465 395 I figur 1, som visar en bränslepatron 3, betecknar 1 en bränslestav och 2 en bränslestavarna 1 sammanhållande spridare av känd typ. Figur 2 visar ett snitt av samma bränslepatron 3 med spridaren 2 sedd ovanifràn. 465 395 In Figure 1, which shows a fuel assembly 3, 1 denotes a fuel rod and 2 a the fuel rods 1 cohesive diffuser of known type. Figure 2 shows one section of the same fuel assembly 3 with the spreader 2 seen from above.

Figur 3 visar en spridare 4 enligt uppfinningen. Spridaren 4 består av ett gallerverk av celler 5 där varje cell är avsedd att fixera en bränslestav 1.Figure 3 shows a spreader 4 according to the invention. The spreader 4 consists of one grid of cells 5 where each cell is intended to fix a fuel rod 1.

Cellerna 5 omslutes av en fyrsidig ram 6. Denna ram 6 är enligt uppfinningen bildad av fyra L-formade skenor eller bandelement 7 som sammanfogats medelst svetsar 8 till en kvadratisk form. Varje bandelement 7 i figuren 3 består av en första kortare skänkel 10 och en andra längre skänkel 11. Naturligtvis kan bandelementen 7 också utföras så att skänklarna blir lika långa eller att skänkeln 10 blir den längre skänkeln. De tvärgående bandplåtarna 9, som bildar gallerverket av celler 5, är vid ändarna svetsade till nämnda skänkel. Den långa skänkeln 11 kommer därigenom att medelst ett flertal svetsar fixeras och därigenom även hålla den kortare skänkeln 10 i läge trots att denna fixeras med endast ett fåtal svetsar eller kanske till och med med endast en svets - detta till skillnad från en liten hörnbit, vars bägge skänklar fixeras med kanske endast en svets på vardera skänkeln.The cells 5 are enclosed by a four-sided frame 6. This frame 6 is according to the invention formed by four L-shaped rails or band elements 7 joined together by welds 8 to a square shape. Each band element 7 in Figure 3 consists of a first shorter leg 10 and a second longer leg 11. Of course the belt elements 7 can also be designed so that the legs become the same length or that the leg 10 becomes the longer leg. The transverse strip plates 9, which forming the grid of cells 5, are welded at the ends to said leg. The long leg 11 will thereby be by means of a plurality welds are fixed and thereby also keep the shorter leg 10 in position even though this is fixed with only a few welds or maybe even with with only one weld - this in contrast to a small corner piece, whose both legs are fixed with perhaps only one weld on each leg.

I figur 4 visas spridaren 4 sedd från sidan med samma beteckningar som i figur 3 införda. Figur 5 visar ett förstorat hörn av spridaren 4. I figu- rerna 6 och 7 visas utformningen av ett bandelement 7 med skänklarna 10 respektive 11.Figure 4 shows the spreader 4 seen from the side with the same designations as in Figure 3 introduced. Figure 5 shows an enlarged corner of the spreader 4. In fig. Figures 6 and 7 show the design of a band element 7 with the legs 10 respectively 11.

Som nämnts i beskrivningens inledning är det lämpligt att de L-formade bandelementen 7 utföres lika så att t ex som visas i figurerna alla skänklar är sinsemellan lika och alla skänklarna 11 sinsemellan lika. Längden på skänklarna i förhållande till varandra kan naturligtvis varieras inom vida gränser men den kortare skänkeln i ett bandelement bör alltid ha en längd som är minst 1/50 av den längre. Man kan naturligtvis också göra skänklarna lika långa då längden på en skänkel blir lika med halva längden av ramens 6 sida om ramen 6 är kvadratisk.As mentioned in the introduction to the description, it is suitable that they be L-shaped the band elements 7 are made the same so that, for example, as shown in the figures, all the legs are equal to each other and all the legs 11 are equal to each other. The length of the legs in relation to each other can of course vary widely limits but the shorter leg in a band element should always have a length which is at least 1/50 of the longer. Of course you can also make the legs equal in length when the length of a leg becomes equal to half the length of the frame 6 side if the frame 6 is square.

Figur 5 visar att övre och nedre delen av spridarens 4 hörn 12 är inbockade för att bilda avvisande glidplan. 1,55Figure 5 shows that the upper and lower part of the corners 12 of the diffuser 4 are bent in to form a repulsive slide. 1.55

Claims (3)

PATENTKRAV 465 395CLAIMS 465 395 1. Spridare (4) för sammanhållning av långsträckta bränslestavar till en bränslepatron för en kärnreaktor, där spridaren (4) innefattar ett antal celler (5) omslutna av en fyrsidig ram (6), k ä n n e t e c k n a d av att ramen (6) bildas av fyra med varandra sammansvetsade L-formade bandelement (7), varje bandelement innefattande en första och en andra skänkel (10, 11), nämnda skänklar (10, 11) bildande i huvudsak 90 graders vinkel med varandra samt sammanfogade medelst svetsar anordnade på ställen skilda från ramens (6) hörn.A diffuser (4) for holding elongate fuel rods together into a fuel assembly for a nuclear reactor, the diffuser (4) comprising a number of cells (5) enclosed by a four-sided frame (6), characterized in that the frame (6) is formed by four L-shaped band elements (7) welded together, each band element comprising a first and a second leg (10, 11), said legs (10, 11) forming a substantially 90 degree angle with each other and joined together by welds arranged in different places from the corner of the frame (6). 2. Spridare enligt patentkrav 1, k ä n n e t e c k n a d av att de fyra bandelementen (7) är lika så till vida att de första (10) respektive andra (11) skänklarna har inbördes samma längd.Spreader according to claim 1, characterized in that the four belt elements (7) are equal to the extent that the first (10) and second (11) legs, respectively, have the same length. 3. Spridare enligt patentkrav 1 eller 2, k ä n n e t e c k n a d av att i ett bandelement (7) den kortaste skänkeln har en längd minst motsvarande 1/50 av den andra skänkeln.Spreader according to claim 1 or 2, characterized in that in a band element (7) the shortest leg has a length at least corresponding to 1/50 of the other leg.
SE9000512A 1990-02-13 1990-02-13 Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor SE465395B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE9000512A SE465395B (en) 1990-02-13 1990-02-13 Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE9000512A SE465395B (en) 1990-02-13 1990-02-13 Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor

Publications (2)

Publication Number Publication Date
SE9000512D0 SE9000512D0 (en) 1990-02-13
SE465395B true SE465395B (en) 1991-09-02

Family

ID=20378543

Family Applications (1)

Application Number Title Priority Date Filing Date
SE9000512A SE465395B (en) 1990-02-13 1990-02-13 Spreader for holding together elongate fuel rods for a fuel cartridge for a nuclear reactor

Country Status (1)

Country Link
SE (1) SE465395B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008712A1 (en) * 1995-08-24 1997-03-06 Abb Atom Ab Spacer for a fuel assembly and a fuel assembly

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997008712A1 (en) * 1995-08-24 1997-03-06 Abb Atom Ab Spacer for a fuel assembly and a fuel assembly

Also Published As

Publication number Publication date
SE9000512D0 (en) 1990-02-13

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