GB1386424A - Locating grids - Google Patents

Locating grids

Info

Publication number
GB1386424A
GB1386424A GB1216272A GB1216272A GB1386424A GB 1386424 A GB1386424 A GB 1386424A GB 1216272 A GB1216272 A GB 1216272A GB 1216272 A GB1216272 A GB 1216272A GB 1386424 A GB1386424 A GB 1386424A
Authority
GB
United Kingdom
Prior art keywords
grid
compartments
fuel
pin
pins
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
GB1216272A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Priority to GB1216272A priority Critical patent/GB1386424A/en
Publication of GB1386424A publication Critical patent/GB1386424A/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
    • G21C3/34—Spacer grids
    • G21C3/348—Spacer grids formed of assembled non-intersecting strips
    • 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)
  • Solid Fuels And Fuel-Associated Substances (AREA)

Abstract

1386424 Fuel elements UNITED KING- DOM ATOMIC ENERGY AUTHORITY 22 March 1973 [15 March 1972] 12162/72 Heading G6C A locating grid for a nuclear fuel assembly comprises a plurality of metal strips interconnected to form a plurality of walls arranged to contact each fuel pin at only two circumferentially separated locations which are not diametrically opposite one another, at least two such grids being displaced along the fuel assembly and suitably oriented relative to one another so that lateral movement of each fuel pin as a whole is substantially prevented. As shown, the metal strips 1 are bent at angles of 120 degrees and the compartments 2 each house two or more fuel pins 3 (with the exception of compartments 14, 15 which each house but one fuel pin). At each corner of the hexagonal perimeter of the grid there is located a hexagonal member 8 having a rounded outermost apex and a central hole 9. The walls of each compartment 2 form a regular part-hexagon, two of these walls each including an integral projection 10. The grid is braced either by means of metal strips 11 or by means of triangular metal filling pieces 12. An identical grid is spaced along the fuel pins 3 and displaced relative to the first grid by 180 degrees so that the two grids co-operate to complete, in plan, each hexagon and thereby wholly surround each fuel pin. The pins while being located against bodily lateral movement in any direction, are free to move relative to each individual grid, which movement is accommodated by the pins " snaking " slightly between grids. Although in the embodiment described the compartments are hexagonal, this is not essential and other geometrical figures, such as a square or rhombus, may be used. The compartments may even have curved sides. In an alternative form of the invention, the metal strips are bent and interconnected to form compartments each of which houses only one fuel pin, for example, closed hexagonal compartments such as the compartments 14, 15 in Fig. 1. The pin in each compartment is contacted by a pair of projections on one such grid and by an oppositely located pair of projections on an adjacent displaced and suitably oriented grid.
GB1216272A 1972-03-15 1972-03-15 Locating grids Expired GB1386424A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB1216272A GB1386424A (en) 1972-03-15 1972-03-15 Locating grids

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1216272A GB1386424A (en) 1972-03-15 1972-03-15 Locating grids

Publications (1)

Publication Number Publication Date
GB1386424A true GB1386424A (en) 1975-03-05

Family

ID=9999493

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1216272A Expired GB1386424A (en) 1972-03-15 1972-03-15 Locating grids

Country Status (1)

Country Link
GB (1) GB1386424A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363774A1 (en) * 1976-09-06 1978-03-31 Sulzer Ag SPACING DEVICE FOR PARALLEL CYLINDRICAL ELEMENTS
FR2477754A1 (en) * 1980-03-05 1981-09-11 Kraftwerk Union Ag Fuel element esp. for breeder or converter reactor - has local clamping bands around rod assembly and helical spacers
EP0084947A2 (en) * 1982-01-20 1983-08-03 United Kingdom Atomic Energy Authority Bracing grids for nuclear reactor fuel sub-assemblies
US4714585A (en) * 1985-03-15 1987-12-22 The United States Of America As Represented By The United States Department Of Energy Interlocking egg-crate type grid assembly
FR2662010A1 (en) * 1990-05-10 1991-11-15 Framatome Sa GRID FOR NETWORK NUCLEAR FUEL ASSEMBLY AND ASSEMBLY INCLUDING APPLICATION.

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2363774A1 (en) * 1976-09-06 1978-03-31 Sulzer Ag SPACING DEVICE FOR PARALLEL CYLINDRICAL ELEMENTS
FR2477754A1 (en) * 1980-03-05 1981-09-11 Kraftwerk Union Ag Fuel element esp. for breeder or converter reactor - has local clamping bands around rod assembly and helical spacers
DE3008456A1 (en) * 1980-03-05 1981-09-17 Kraftwerk Union AG, 4330 Mülheim FUEL ELEMENT FOR A CORE REACTOR
EP0084947A2 (en) * 1982-01-20 1983-08-03 United Kingdom Atomic Energy Authority Bracing grids for nuclear reactor fuel sub-assemblies
EP0084947A3 (en) * 1982-01-20 1984-04-25 United Kingdom Atomic Energy Authority Bracing grids for nuclear reactor fuel sub-assemblies
US4714585A (en) * 1985-03-15 1987-12-22 The United States Of America As Represented By The United States Department Of Energy Interlocking egg-crate type grid assembly
FR2662010A1 (en) * 1990-05-10 1991-11-15 Framatome Sa GRID FOR NETWORK NUCLEAR FUEL ASSEMBLY AND ASSEMBLY INCLUDING APPLICATION.
EP0460982A1 (en) * 1990-05-10 1991-12-11 Framatome Nuclear fuel assembly grid having a triangle pattern and utilisation in an assembly
US5174950A (en) * 1990-05-10 1992-12-29 Compagnie Generale Des Mattieres Nucleaires Grid for nuclear fuel assembly

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee