FR2326765A1 - Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure - Google Patents

Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure

Info

Publication number
FR2326765A1
FR2326765A1 FR7530247A FR7530247A FR2326765A1 FR 2326765 A1 FR2326765 A1 FR 2326765A1 FR 7530247 A FR7530247 A FR 7530247A FR 7530247 A FR7530247 A FR 7530247A FR 2326765 A1 FR2326765 A1 FR 2326765A1
Authority
FR
France
Prior art keywords
casing
core structure
core
fixed
sleeve
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.)
Granted
Application number
FR7530247A
Other languages
French (fr)
Other versions
FR2326765B1 (en
Inventor
Jacques Delafosse
Jean Rogers
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
Priority to FR7530247A priority Critical patent/FR2326765A1/en
Priority to GB39323/76A priority patent/GB1519546A/en
Priority to DE19762644516 priority patent/DE2644516A1/en
Priority to JP51118390A priority patent/JPS5945113B2/en
Priority to IT69367/76A priority patent/IT1071624B/en
Priority to ES452059A priority patent/ES452059A1/en
Publication of FR2326765A1 publication Critical patent/FR2326765A1/en
Application granted granted Critical
Publication of FR2326765B1 publication Critical patent/FR2326765B1/fr
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C5/00—Moderator or core structure; Selection of materials for use as moderator
    • G21C5/02—Details
    • G21C5/06—Means for locating or supporting fuel elements
    • 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
    • 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
    • G21C3/36—Assemblies of plate-shaped fuel elements or coaxial tubes
    • 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

Abstract

Nuclear reactor, having a core, formed by a series of fuel assemblies and of mobile cruciform control rods with four arms, installed within a pressure vessel, is provided with a lower grid fixed to the vessel. A series of casings or housings are fixed to this grid so as to be capable of being dismantled by remote control. Each casing contains at least one fuel assembly suspended at its upper end from the casing. The casing has a rectangular parallelepipedic shape with four vertical walls joined to each other, an open top and a base closed by a rectangular plate with an aperture. The reactor is provided with means for supporting the fuel assemblies and casings. The method for the dismantlable fixing of each casing on the lower grid consists of a sleeve fixed to and projecting above the upper face of the grid. The sleeve is fabricated in a material with a coefficient of thermal expansion above that used for the base plate of the casing. The external dia. of the sleeve when cold is less than that of the aperture in the casing base plate, but equals it at the reactor operating temp. so that the play between these two elements is taken up by thermal expansion. Design provides a core structure which meets most of the desirable requirements such as the separation of the functions to be fulfilled by the core in such a way as to be able to deal easily with such function each time the core is rearranged. These functions include prodn. of neutrons, control of core reactivity by fixed (i.e. consumable poisons) or mobile absorbents, e.g. control rods, mechanical cohesion of the fuel assemblies and reduction in the demand for zircalloy in the core structure.
FR7530247A 1975-10-02 1975-10-02 Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure Granted FR2326765A1 (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
FR7530247A FR2326765A1 (en) 1975-10-02 1975-10-02 Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure
GB39323/76A GB1519546A (en) 1975-10-02 1976-09-22 Nuclear reactor
DE19762644516 DE2644516A1 (en) 1975-10-02 1976-10-01 NUCLEAR REACTOR
JP51118390A JPS5945113B2 (en) 1975-10-02 1976-10-01 Reactor
IT69367/76A IT1071624B (en) 1975-10-02 1976-10-01 HEART STRUCTURE FOR NUCLEAR REACTORS
ES452059A ES452059A1 (en) 1975-10-02 1976-10-01 Nuclear reactor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7530247A FR2326765A1 (en) 1975-10-02 1975-10-02 Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure

Publications (2)

Publication Number Publication Date
FR2326765A1 true FR2326765A1 (en) 1977-04-29
FR2326765B1 FR2326765B1 (en) 1981-03-27

Family

ID=9160763

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7530247A Granted FR2326765A1 (en) 1975-10-02 1975-10-02 Core structure for nuclear reactor - with fuel assembly casings firmly supported at operating temp. but readily dismantled for rearranging the core structure

Country Status (1)

Country Link
FR (1) FR2326765A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208862A1 (en) * 2007-10-26 2010-08-19 Denis Lorenzo Device for supporting nuclear fuel plate for a fissile bundle of a nuclear reactor of gfr type with high-temperature heat transfer gas

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100208862A1 (en) * 2007-10-26 2010-08-19 Denis Lorenzo Device for supporting nuclear fuel plate for a fissile bundle of a nuclear reactor of gfr type with high-temperature heat transfer gas
US8588361B2 (en) 2007-10-26 2013-11-19 Commissariat A L'energie Atomique Et Aux Energies Alternatives Device for supporting nuclear fuel plate for a fissile bundle of a nuclear reactor of GFR type with high-temperature heat transfer gas

Also Published As

Publication number Publication date
FR2326765B1 (en) 1981-03-27

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Legal Events

Date Code Title Description
ST Notification of lapse