GB969889A - Fuel element for nuclear reactor - Google Patents

Fuel element for nuclear reactor

Info

Publication number
GB969889A
GB969889A GB34629/63A GB3462963A GB969889A GB 969889 A GB969889 A GB 969889A GB 34629/63 A GB34629/63 A GB 34629/63A GB 3462963 A GB3462963 A GB 3462963A GB 969889 A GB969889 A GB 969889A
Authority
GB
United Kingdom
Prior art keywords
plug
pellet
sheath
load
sept
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
GB34629/63A
Inventor
Maurice Gauthron
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 GB969889A publication Critical patent/GB969889A/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
    • G21C3/16—Details of the construction within the casing
    • G21C3/18—Internal spacers or other non-active material within the casing, e.g. compensating for expansion of fuel rods or for compensating excess reactivity
    • 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
    • G21C3/10—End closures ; Means for tight mounting therefor
    • 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
    • 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
    • G21C3/14—Means forming part of the element for inserting it into, or removing it from, the core; Means for coupling adjacent elements, e.g. to form a stringer
    • 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

969,889. Nuclear fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. Sept. 2,1963 [Sept. 5, 1962], No. 34629/63. Heading G6C. A nuclear fuel element comprises a sheath 18 housing a fuel rod 16 of fertile or fissile material and closed by a plug 20 welded at 22 to the sheath 18 with an insulating pellet 24, e.g. of alumina, between the rod 16 and the plug 20, the contact surfaces 28 and 30 between the pellet 24 and the plug 20 and between the plug 20 and an abutment member 26 being sufficiently roughened to cause the plug 20 to be subjected to shear stresses when a load is transmitted between the element and the abutment member. In some cases it is preferable to replace the insulating pellet, 24 by a heat conductive pellet. The sheath 18 and the plug 20 may be formed from a Mg-Zr alloy having a very low Zr content. A rough surface is imparted to the pellet 24, which consists of a harder material than the plug 20, and the latter impresses itself on the surface of the pellet 24 during the sheathing under hydrostatic pressure. Grooves are formed in the surface of the member 26 which comes into contact with the plug 20 and penetration and anchoring of the member 26 in the plug 20 take place due to creep under load in the reactor itself during the temperature rise. The shear stresses which result from the roughened surfaces 28 and 30 reduce the tendency of the plug 20 to creep under a given compressive load. As an alternative to the re-entrant plug 20, a plug welded in prolongation of the sheath 18 (Fig. 3, not shown) may be used.
GB34629/63A 1962-09-05 1963-09-02 Fuel element for nuclear reactor Expired GB969889A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR908667A FR1340884A (en) 1962-09-05 1962-09-05 nuclear reactor fuel element

Publications (1)

Publication Number Publication Date
GB969889A true GB969889A (en) 1964-09-16

Family

ID=8786295

Family Applications (1)

Application Number Title Priority Date Filing Date
GB34629/63A Expired GB969889A (en) 1962-09-05 1963-09-02 Fuel element for nuclear reactor

Country Status (4)

Country Link
BE (1) BE637047A (en)
FR (1) FR1340884A (en)
GB (1) GB969889A (en)
LU (1) LU44374A1 (en)

Also Published As

Publication number Publication date
BE637047A (en)
LU44374A1 (en) 1963-11-04
FR1340884A (en) 1963-10-25

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