GB960813A - Device for centring fuel elements in nuclear reactors - Google Patents

Device for centring fuel elements in nuclear reactors

Info

Publication number
GB960813A
GB960813A GB15560/63A GB1556063A GB960813A GB 960813 A GB960813 A GB 960813A GB 15560/63 A GB15560/63 A GB 15560/63A GB 1556063 A GB1556063 A GB 1556063A GB 960813 A GB960813 A GB 960813A
Authority
GB
United Kingdom
Prior art keywords
blades
sheath
centring
sleeve
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
GB15560/63A
Inventor
Bernard Boudouresque
Plerre Rouge
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 GB960813A publication Critical patent/GB960813A/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
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/06—Casings; Jackets
    • G21C3/12—Means forming part of the element for locating it within the reactor core
    • 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
    • G21C15/04—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from fissile or breeder material
    • 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
    • G21C3/02—Fuel elements
    • G21C3/04—Constructional details
    • G21C3/06—Casings; Jackets
    • G21C3/08—Casings; Jackets provided with external means to promote heat-transfer, e.g. fins, baffles
    • 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
    • G21C3/38—Fuel units consisting of a single fuel element in a supporting sleeve or in another supporting element
    • 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

960, 813. Nuclear fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. April 19, 1963 [April 20, 1962; July 20, 1962], No. 15560/63. Heading G6C. A device for centring a fuel element provided with an external sheath comprising fins arranged in herringbone form in relation to an annular structure surrounding the element is composed of at least three centring blades, of which the centre planes are directed towards the axis of the element, and which are fast with the structure and in contact with the sheath, or vice versa. As shown in Fig. 7, the fuel element 2 comprises a tube 4 of fuel material, e.g. pure or lightly alloyed uranium, closed at each end by a uranium pellet 6 and enclosed in a sheath 8 on the outside surface of which are fins 17 arranged in series forming herringbone patterns with a longitudinal groove 18 between each two successive series. There are three centring blades 20 engaging three alternate grooves 18. The sheath 8 may, for example, be of Mg-Zr alloy of low Zr content and is closed by welded plugs 14 which may, for example, be of Mg-Mn alloy of very low Mn content. The element is supported within an annular sleeve 26 to form a fuel cartridge by means of a central plug 30 suspended in the sleeve by a series of crossed wires 32. These wires have sufficient flexibility to damp the shocks to which the element 2 is subjected during loading and unloading operations. In this construction, the blades 20 are prevented from rotating within the sleeve 26 by being engaged within longitudinal slots 34 in the inside wall of the sleeve. In addition, the blades 20 are prevented from slipping in a direction parallel to the axis of the element by means of teeth 24 integral with the blades which engage in radial recesses 36 of greater depth than the corresponding slots 34. Alternatively, the blades 20 may be directly welded to the sheath 8 or to the sleeve 26. Since herringbone-type sheaths eliminate the aerodynamic forces which tend to turn the fuel element within the coolant channel, the gas flows which they induce being symmetrical in pairs, the centring blades 20 have to exert no opposing torque and it is sufficient for them to have adequate rigidity in the longitudinal and radial directions. In order to reduce the neutron absorbtion, the blades are provided with recesses 22 either of semicircular, trapezoidal or rectangular form, or as simple holes in the blade. Advantageously, the blades 20 are tapered inwardly at their edges engaged in the longitudinal'grooves 18 of the sheath.
GB15560/63A 1962-04-20 1963-04-19 Device for centring fuel elements in nuclear reactors Expired GB960813A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR895309A FR1328540A (en) 1962-04-20 1962-04-20 Centering device for nuclear reactor fuel element
FR904701A FR1339587A (en) 1962-04-20 1962-07-20 Fuel cell for nuclear reactor

Publications (1)

Publication Number Publication Date
GB960813A true GB960813A (en) 1964-06-17

Family

ID=26195342

Family Applications (1)

Application Number Title Priority Date Filing Date
GB15560/63A Expired GB960813A (en) 1962-04-20 1963-04-19 Device for centring fuel elements in nuclear reactors

Country Status (6)

Country Link
BE (1) BE631312A (en)
CH (1) CH406459A (en)
DE (1) DE1295711B (en)
FR (2) FR1328540A (en)
GB (1) GB960813A (en)
LU (1) LU43592A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278389A (en) * 1964-01-21 1966-10-11 Commissariat Energie Atomique Fuel element for nuclear reactors
US4274920A (en) * 1977-04-13 1981-06-23 Gibbs & Hill, Inc. Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1408832A (en) * 1964-07-07 1965-08-20 Commissariat Energie Atomique Self-centering support for nuclear fuel cartridge
FR1408831A (en) * 1964-07-07 1965-08-20 Commissariat Energie Atomique Support device for nuclear fuel elements
FR2943166B1 (en) * 2009-03-11 2012-10-05 Commissariat Energie Atomique NUCLEAR FUEL STORAGE CASE WITH FACILITATED CLOSURE.

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB856740A (en) * 1956-09-05 1960-12-21 English Electric Co Ltd Improvements relating to fuel element cans for nuclear reactors
FR1210319A (en) * 1958-09-18 1960-03-08 Commissariat Energie Atomique Further development of fuel element supports in vertical channel atomic cells
FR1215911A (en) * 1958-11-22 1960-04-21 Commissariat Energie Atomique Further development of fuel element supports in vertical channel atomic cells
FR1289281A (en) * 1960-05-17 1962-03-30 Babcock & Wilcox Ltd Enhancements to the sheaths or shields of nuclear fuel cartridges

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3278389A (en) * 1964-01-21 1966-10-11 Commissariat Energie Atomique Fuel element for nuclear reactors
US4274920A (en) * 1977-04-13 1981-06-23 Gibbs & Hill, Inc. Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling

Also Published As

Publication number Publication date
LU43592A1 (en) 1963-06-19
CH406459A (en) 1966-01-31
FR1328540A (en) 1963-05-31
BE631312A (en)
FR1339587A (en) 1963-10-11
DE1295711B (en) 1969-05-22

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