GB1274405A - Nuclear fuel assembly - Google Patents

Nuclear fuel assembly

Info

Publication number
GB1274405A
GB1274405A GB01125/71A GB1112571A GB1274405A GB 1274405 A GB1274405 A GB 1274405A GB 01125/71 A GB01125/71 A GB 01125/71A GB 1112571 A GB1112571 A GB 1112571A GB 1274405 A GB1274405 A GB 1274405A
Authority
GB
United Kingdom
Prior art keywords
rods
grids
tie
fuel rods
fuel
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.)
Expired
Application number
GB01125/71A
Inventor
Jacques Delafosse
Jean-Luc Viaud
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.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
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 Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of GB1274405A publication Critical patent/GB1274405A/en
Expired legal-status Critical Current

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
    • G21C3/33—Supporting or hanging of elements in the bundle; Means forming part of the bundle for inserting it into, or removing it from, the core; Means for coupling adjacent bundles
    • G21C3/332—Supports for 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

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)

Abstract

1,274,405. Fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. 23 April, 1971 [6 May, 1970], No. 11125/71. Heading G6C. A nuclear fuel assembly comprises a cluster of fuel rods 12, retained parallel and at the nodel points of a regular network by a bottom end plate 14 which bears the fuel rods 12 and by spacing grids 20, the bottom end plate 14 being connected to a top end plate (not shown) by tierods 18 which occupy certain of the nodel points of the network, where they are substituted for the fuel rods, and which are of a diameter substantially equal to that of the fuel rods, the grids 20 frictionally engaging both the fuel rods 12 and the tie-rods 18. Each of the grids 20 comprises inside a frame a network of nested metal sheets bounding cells of square section. The metal sheets have portions cut out and each is formed by two parallel rectilinear ribbons connected by narrow corrugated strips 30. The tie-rods 18 may be formed as guide tubes for neutron-absorbing control rods, or may contain a burnable poison or some other filling material. The bottom of each of the tierods 18 has an attaching stud 32 screw-threaded to receive a securing nut 34. Where the tie-rod is a control rod guide tube, the stud 32 is formed with an axial passage through which coolant flows. The top of each of the tie-rods 18 is attached to the top plate (not shown), e.g. by crimping. The top and bottom plates are formed with orifices through which coolant enters and leaves. The movement of the grids 20 along the tie-rods 18 is limited by tubular struts, such as 36, 38 and 40, borne by the four corner tie-rods 18. The total length of the struts and the grids 20 is less than the distance separating the facing surfaces of the top and bottom end plates, so as to leave the necessary clearance for total differential elongation during operation. Since the number of fuel rods 12 is much greater than the number of tie-rods 18, the frictional forces exerted by the grids on the assembly of fuel rods are much greater than those exerted on the assembly of tie-rods. As a result, such forces retain the grids on the fuel rods, while the tierods slide slightly when thermal conditions change. However, movements of low amplitude can take place between the grids and some of the fuel rods, due to differences in expansion which may occur amongst the fuel rods.
GB01125/71A 1970-05-06 1971-04-23 Nuclear fuel assembly Expired GB1274405A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7016666A FR2088009B1 (en) 1970-05-06 1970-05-06

Publications (1)

Publication Number Publication Date
GB1274405A true GB1274405A (en) 1972-05-17

Family

ID=9055205

Family Applications (1)

Application Number Title Priority Date Filing Date
GB01125/71A Expired GB1274405A (en) 1970-05-06 1971-04-23 Nuclear fuel assembly

Country Status (6)

Country Link
JP (1) JPS5546599B1 (en)
BE (1) BE766289A (en)
DE (1) DE2122008C3 (en)
FR (1) FR2088009B1 (en)
GB (1) GB1274405A (en)
SE (1) SE372363C (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2354610A1 (en) * 1976-06-11 1978-01-06 Commissariat Energie Atomique PLATE FUEL ASSEMBLY FOR NUCLEAR REACTOR
FR2390804A1 (en) * 1977-05-13 1978-12-08 Commissariat Energie Atomique NUCLEAR FUEL ASSEMBLY
FR2420826A1 (en) * 1978-03-22 1979-10-19 Commissariat Energie Atomique REMOTELY MOUNTABLE AND REMOVABLE FUEL ASSEMBLY FOR NUCLEAR REACTOR AND CORRESPONDING TOOLS
FR2465295A1 (en) * 1979-09-06 1981-03-20 Commissariat Energie Atomique ANTI-ENVOL DEVICE FOR NUCLEAR REACTOR COMBUSTIBLE ELEMENT
FR2520916B1 (en) * 1982-02-03 1986-04-18 Fragema Framatome & Cogema FUEL ASSEMBLY WITH CONSUMABLE POISON
FR2522866B1 (en) * 1982-03-04 1987-12-31 Commissariat Energie Atomique NUCLEAR REACTOR FUEL ASSEMBLY
DE9016426U1 (en) * 1990-12-03 1991-02-21 Siemens AG, 8000 München Centering pin for a control rod guide insert

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015616A (en) * 1956-11-02 1962-01-02 Westinghouse Electric Corp Rod type fuel assembly
US3068163A (en) * 1958-08-26 1962-12-11 Jr Edwin L Currier Method and means for supporting reactor fuel containers in an assembly
US3137638A (en) * 1959-05-23 1964-06-16 Siemens Ag Neutronic reactor fuel elements
BE630760A (en) * 1962-04-13
GB1148881A (en) * 1965-05-13 1969-04-16 Atomic Energy Authority Uk Improvements in or relating to fuel assemblies for nuclear reactors
US3423287A (en) * 1965-09-21 1969-01-21 Combustion Eng Nuclear reactor fuel element support
FR1536257A (en) * 1966-05-25 1968-08-16 Westinghouse Electric Corp Fuel assemblies for nuclear reactors
FR1546968A (en) * 1966-12-07 1968-11-22 Gen Electric Bundle of removable fuel elements for nuclear reactors
US3475273A (en) * 1967-12-05 1969-10-28 Combustion Eng Nuclear reactor fuel assembly
FR1584335A (en) * 1968-07-02 1969-12-19

Also Published As

Publication number Publication date
SE372363B (en) 1974-12-16
FR2088009B1 (en) 1973-11-16
DE2122008C3 (en) 1986-07-10
JPS5546599B1 (en) 1980-11-25
SE372363C (en) 1978-11-20
BE766289A (en) 1971-09-16
DE2122008A1 (en) 1972-01-27
FR2088009A1 (en) 1972-01-07
DE2122008B2 (en) 1975-11-20

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
435 Patent endorsed 'licences of right' on the date specified (sect. 35/1949)
PCNP Patent ceased through non-payment of renewal fee