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SE458729B - SPLITTED BURN LEATHER FOR A NUCLEAR REACTOR, SEARCH SIGN AND COOK WATER REACTOR - Google Patents

SPLITTED BURN LEATHER FOR A NUCLEAR REACTOR, SEARCH SIGN AND COOK WATER REACTOR

Info

Publication number
SE458729B
SE458729B SE8406377A SE8406377A SE458729B SE 458729 B SE458729 B SE 458729B SE 8406377 A SE8406377 A SE 8406377A SE 8406377 A SE8406377 A SE 8406377A SE 458729 B SE458729 B SE 458729B
Authority
SE
Sweden
Prior art keywords
fuel
fuel element
reactor
gaps
fuel rods
Prior art date
Application number
SE8406377A
Other languages
Swedish (sv)
Other versions
SE8406377L (en
SE8406377D0 (en
Inventor
M Lovincic
P Kilian
J Unger
Original Assignee
Siemens Ag
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 Siemens Ag filed Critical Siemens Ag
Publication of SE8406377D0 publication Critical patent/SE8406377D0/en
Publication of SE8406377L publication Critical patent/SE8406377L/en
Publication of SE458729B publication Critical patent/SE458729B/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
    • G21C3/326—Bundles of parallel pin-, rod-, or tube-shaped fuel elements comprising fuel elements of different composition; comprising, in addition to the fuel elements, other pin-, rod-, or tube-shaped elements, e.g. control rods, grid support rods, fertile rods, poison rods or dummy rods
    • G21C3/328—Relative disposition of the elements in the bundle lattice
    • 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
    • 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)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Lasers (AREA)
  • Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)

Description

L 458 729 För närmare förklaring av uppfinningen hänvisas till figu- rerna på bifogade ritningar. Där visar fig. 1 ett bränsleelement enligt uppfinningen i perspektiv. Fig. 2, 3 och H visar tre sin- semellan vinkelräta skärningar med detaljer enligt uppfinningen. L 458 729 For a more detailed explanation of the invention, reference is made to the figures in the accompanying drawings. Fig. 1 shows a fuel element according to the invention in perspective. Figs. 2, 3 and H show three mutually perpendicular intersections with details according to the invention.

Det i fig. 1 visade bränslelementet hör till en kokvatten- reaktor av exempelvis 1300 MW effekt. Det har en fotdel 2, med vilken det är fäst vid en inte visad nedre bärplatta. Det har vidare en toppdel 3, som är styrd i ett övre kärngaller. De i fig. 1 inte synliga bränslestavarna, vilka förlöper mellan fot- delen och toppdelen, är inneslutna i lådor 5, vilka styr ström- ningen genom bränsleelementet, när detta under drift är anord- nat i vertikal riktning och genomströmmas nedifrân och uppåt.The fuel element shown in Fig. 1 belongs to a boiling water reactor of, for example, 1300 MW power. It has a foot part 2, with which it is attached to a lower support plate (not shown). It further has a top part 3, which is guided in an upper core grid. The fuel rods, which are not visible in Fig. 1, which extend between the foot part and the top part, are enclosed in boxes 5, which control the flow through the fuel element, when this is arranged in vertical direction during operation and flows through from below and upwards.

Vid bränsleelementet 1 enligt uppfinningen är den övre de- len 7 av detta, vilken sträcker sig längs halva längden av bräns- leelementet, försedd med en vattenspalt 8, vilken i stället för en rad bränslestavar förlöper tvärs över hela det kvadrafiíßkä tvärsnittet för bränsleelementet.In the fuel element 1 according to the invention, the upper part 7 thereof, which extends along half the length of the fuel element, is provided with a water gap 8, which instead of a series of fuel rods extends across the entire square cross-section of the fuel element.

Därigenom skall ytterligare moderator åstadkommas inom det omrâde, i vilket moderatí0flen är låg i en kokvattenreaktors bränsleelement på grund av ång- innehållet.Thereby, an additional moderator must be provided within the area in which the moderator is low in a fuel element of a boiling water reactor due to the steam content.

Enligt vad fig. 2 visar är den nedre änden av spalten 8 försedd med en tvärs mot bränslelementet förlöpande hållare 10, som har borrhål 11, anbragta. i vilka de förkortade bränslestavarna 12 är Längden av dessa bränslestavar är så mycket kortare än de normala bränslestavarna 13 som höjden av spalten 8. De normala bränslestavarna sträcker sig längs hela bränsleelementet 1, exempelvis med längden 1; m. exempelvis 1,9 m.According to Fig. 2, the lower end of the gap 8 is provided with a holder 10 extending transversely to the fuel element, which has boreholes 11, arranged. in which the shortened fuel rods 12 are The length of these fuel rods is as much shorter than the normal fuel rods 13 as the height of the gap 8. The normal fuel rods extend along the entire fuel element 1, for example by the length 1; m. for example 1.9 m.

De kortare bränslestavarna är Fig. U visar att spalten 8 sträcker sig genom hela det kva- dratiska tvärsnittet av bränsleelementet 1, alltså från en sido- yta på lådan 5 till motliggande sidoyta. De väggar, som begrän- sar spalten 8 utgöres av två plana plåtskivor 14, vilka förlöper parallellt med varandra på ett avstånd som motsvarar bränslesta- varnas diameter och vilka är metallurgiskt förbundna med hålla- ren 10 till en enhetlig metallurgisk kropp, enligt vad fig. 3 visar. I mitten av bränsleelementet är ett distanselemßflfi 15 anordnat för att öka hàllfastheten.The shorter fuel rods are Fig. U shows that the gap 8 extends through the entire square cross-section of the fuel element 1, i.e. from a side surface of the box 5 to the opposite side surface. The walls delimiting the gap 8 are constituted by two flat sheet metal plates 14, which run parallel to each other at a distance corresponding to the diameter of the fuel rods and which are metallurgically connected to the holder 10 to a uniform metallurgical body, as shown in fig. 3 shows. In the middle of the fuel element, a spacer element flfi 15 is arranged to increase the strength.

Claims (5)

3 458 729 Patentkrav3,458,729 Claims 1. Bränsleelement för en kärnreaktor, särskilt en kok- vattenreaktor, med kvadratiskt eller sexkantígt tvärsnitt och med däri anordnade bränslestavar, vilka bildar ett galler, i vilket rätvinkligt mot kanten på tvärsnittet förlöpande spal- ter är anordnade längs bränslestavarna, kännetecknat av att spalterna (8) befinner sig vid den övre delen av bränsle- elementet (1) och att det invid spalterna i längdríktningen grän- sande utrymmet innehåller bränslestavar (12), $°m äP Så mycket kortare än de mellan spalterna liggande bränslestavarna (13) som spalterna är höga.Fuel elements for a nuclear reactor, in particular a boiling water reactor, of square or hexagonal cross-section and with fuel rods arranged therein, which form a grid, in which gaps extending perpendicular to the edge of the cross-section are arranged along the fuel rods, characterized in 8) is located at the upper part of the fuel element (1) and that the space adjacent to the gaps in the longitudinal direction contains fuel rods (12), $ ° m äP As much shorter as the fuel rods (13) lying between the gaps as the gaps are high. 2. Bränsleelement enligt kravet 1, kännetecknat av att en spalt (8) sträcker sig igenom hela tvärsnittet och längs i huvudsak halva höjden av ett bränsleelement (1)-Fuel element according to claim 1, characterized in that a gap (8) extends through the entire cross section and along substantially half the height of a fuel element (1) - 3. Bränsleelement enligt kravet 1 eller 2, känne- tecknat av att de kortare bränslestavarna (12) är anbragta i en hållare (10), som avslutar spalten (8) vid mitten av bränsleelementet och som sträcker sig från en sídoyta på bräns- lelementet till den andra.Fuel element according to claim 1 or 2, characterized in that the shorter fuel rods (12) are arranged in a holder (10), which terminates the gap (8) at the center of the fuel element and which extends from a side surface of the fuel element. to the other. 4. 11. Bränsleelement enligt kravet 3, k ä n n e t e c k n a t av att hållaren (10) är metallurgiskt förbunden med skivor (111), som bildar väggar för spalterna (8). 'Fuel element according to claim 3, characterized in that the holder (10) is metallurgically connected to discs (111), which form walls for the slots (8). ' 5. Bränsleelement enligt kravet 11, k ä n n e t e c k n a t av att distanselement (15) är insatta mellan väggskivorna (111). ___-_.Fuel element according to claim 11, characterized in that spacer elements (15) are inserted between the wall panels (111). ___-_.
SE8406377A 1984-01-12 1984-12-14 SPLITTED BURN LEATHER FOR A NUCLEAR REACTOR, SEARCH SIGN AND COOK WATER REACTOR SE458729B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843400901 DE3400901A1 (en) 1984-01-12 1984-01-12 Split fuel element for a nuclear reactor, in particular a boiling water reactor

Publications (3)

Publication Number Publication Date
SE8406377D0 SE8406377D0 (en) 1984-12-14
SE8406377L SE8406377L (en) 1985-07-13
SE458729B true SE458729B (en) 1989-04-24

Family

ID=6224821

Family Applications (1)

Application Number Title Priority Date Filing Date
SE8406377A SE458729B (en) 1984-01-12 1984-12-14 SPLITTED BURN LEATHER FOR A NUCLEAR REACTOR, SEARCH SIGN AND COOK WATER REACTOR

Country Status (3)

Country Link
DE (1) DE3400901A1 (en)
FI (1) FI82781C (en)
SE (1) SE458729B (en)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4649021A (en) * 1985-06-19 1987-03-10 Westinghouse Electric Corp. BWR fuel assembly with water flow mixing chamber at fuel bundle/water cross entrance
FR2603416B1 (en) * 1986-08-28 1988-12-02 Framatome Sa FUEL ASSEMBLY FOR A NUCLEAR REACTOR WITH AN EVOLVING NETWORK
SE503243C2 (en) * 1987-04-02 1996-04-29 Toshiba Kk Fuel cartridge for a boiling water reactor
US5068082A (en) * 1987-07-18 1991-11-26 Kabushiki Kaisha Toshiba Fuel assembly for nuclear reactor
US5112570A (en) * 1988-04-04 1992-05-12 Hewlett-Packard Company Two-phase pressure drop reduction bwr assembly design
US5091146A (en) * 1991-03-20 1992-02-25 General Electric Company Steam vent tube for BWR fuel assembly

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3132076A (en) * 1960-03-14 1964-05-05 John M West Nuclear reactor
US3505170A (en) * 1968-04-10 1970-04-07 Atomic Energy Commission Fuel subassembly for a liquid-metal-cooled fast reactor
US3741868A (en) * 1970-03-30 1973-06-26 Gen Electric Fuel bundle with removable rods
DE2656841A1 (en) * 1976-12-15 1978-06-22 Iljunin Fast reactor fuel assembly with gas collecting chamber - partly housed in shaft has reduced length and pressure drop
SE421969B (en) * 1980-03-17 1982-02-08 Asea Atom Ab FUEL CARTRIDGE FOR A COOKING REACTOR
SE426271B (en) * 1981-05-04 1982-12-20 Asea Atom Ab KERNBRENSLEPATRON
SE426530B (en) * 1981-05-15 1983-01-24 Asea Atom Ab FUEL CARTRIDGE INTENDED FOR A COOK WATER REACTOR
SE433986B (en) * 1982-07-12 1984-06-25 Asea Atom Ab KERNBRENSLEPATRON

Also Published As

Publication number Publication date
FI82781B (en) 1990-12-31
SE8406377L (en) 1985-07-13
SE8406377D0 (en) 1984-12-14
FI82781C (en) 1991-04-10
DE3400901C2 (en) 1992-02-06
DE3400901A1 (en) 1985-07-25
FI843996A0 (en) 1984-10-11
FI843996L (en) 1985-07-13

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