GB955485A - Improvements in or relating to nuclear fuel elements - Google Patents

Improvements in or relating to nuclear fuel elements

Info

Publication number
GB955485A
GB955485A GB42002/60A GB4200260A GB955485A GB 955485 A GB955485 A GB 955485A GB 42002/60 A GB42002/60 A GB 42002/60A GB 4200260 A GB4200260 A GB 4200260A GB 955485 A GB955485 A GB 955485A
Authority
GB
United Kingdom
Prior art keywords
rods
sectional area
component parts
active material
cross
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
GB42002/60A
Inventor
Raymond Hippolyte Firm Marchal
Rene Georges Julien Oebelieu
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.)
Safran Aircraft Engines SAS
Original Assignee
Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
SNECMA SAS
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 Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA, SNECMA SAS filed Critical Societe Nationale dEtude et de Construction de Moteurs dAviation SNECMA
Publication of GB955485A publication Critical patent/GB955485A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/005—Flux flattening
    • 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
    • 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
    • G21C3/326—Bundles of parallel pin-, rod-, or tube-shaped fuel elements comprising fuel elements of different composition; comprising, in addition to the fuel elements, other pin-, rod-, or tube-shaped elements, e.g. control rods, grid support rods, fertile rods, poison rods or dummy rods
    • G21C3/328—Relative disposition of the elements in the bundle lattice
    • 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

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

955, 485. Nuclear fuel elements. SOC. NATIONALE D'ETUDE ET DE CONSTRUCTION DE MOTEURS D'AVIATION. Dec. 6,1960 [Dec. 11, 1959], No. 42002/60. Heading G6C. The component parts of a fuel element for a nuclear reactor contain an active material, i.e. a mixture of a fissile material with an isotope which is not (or only very slightly) fissile, and are in the form of bundles of rods or concentric cylindrical rings, the cross-sectional area and the concentration of active material of each of the component parts being so correlated that the surface thermal flow is the same for all the component parts. The component parts (i.e. rods or rings) may have the same cross-sectional area and an active material concentration which increases towards the centre of the element, a uniform concentration of active material and a cross-sectional area which increases towards the centre of the element, or, both a concentration and a cross-sectional area which increase towards the centre of the element. In one example, six peripheral rods 1 surround a central rod 2, both rods 1 and 2 being of 10 mm dia. and clad in sheaths 3 of an alloy of 80% by wt. Ni and 20% by wt. Cr of 1 mm thickness. The material of the six peripheral rods 1 comprises 40% by wt. UO 2 (20% by wt. U-235) in a homogenous mixture with 60% by wt. MgO while the material of the central rod 2 comprises 48% by wt. of the same UO 2 and 52% by wt. MgO. The element is housed in a channel 18 of 40 mm dia.
GB42002/60A 1959-12-11 1960-12-06 Improvements in or relating to nuclear fuel elements Expired GB955485A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR812878A FR1252674A (en) 1959-12-11 1959-12-11 advanced nuclear fuel elements

Publications (1)

Publication Number Publication Date
GB955485A true GB955485A (en) 1964-04-15

Family

ID=8722513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB42002/60A Expired GB955485A (en) 1959-12-11 1960-12-06 Improvements in or relating to nuclear fuel elements

Country Status (6)

Country Link
BE (1) BE597707A (en)
DE (1) DE1439058A1 (en)
FR (1) FR1252674A (en)
GB (1) GB955485A (en)
LU (1) LU39505A1 (en)
NL (1) NL258581A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059484A (en) * 1975-05-02 1977-11-22 Exxon Nuclear Company, Inc. Hybrid nuclear fuel assembly with reduced linear heat generation rates
US4689195A (en) * 1981-05-15 1987-08-25 Hitachi, Ltd. Fuel assembly
US4818478A (en) * 1987-12-07 1989-04-04 Westinghouse Electric Corp. BWR fuel assembly mini-bundle having interior fuel rods of reduced diameter

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3179571A (en) * 1960-11-03 1965-04-20 Siemens Ag Nuclear fuel units with enclosures of the thimble type for pressure-tube nuclear reactors
US3305449A (en) * 1965-09-14 1967-02-21 William T Furgerson Nuclear reactor core assembly
DE2757396A1 (en) * 1977-12-22 1979-07-05 Kraftwerk Union Ag FUEL ELEMENT FOR FAST NUCLEAR REACTORS
JPS61223582A (en) * 1985-03-29 1986-10-04 株式会社日立製作所 Fuel aggregate for nuclear reactor
JPH0660948B2 (en) * 1985-04-12 1994-08-10 株式会社日立製作所 Fuel assembly

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4059484A (en) * 1975-05-02 1977-11-22 Exxon Nuclear Company, Inc. Hybrid nuclear fuel assembly with reduced linear heat generation rates
US4689195A (en) * 1981-05-15 1987-08-25 Hitachi, Ltd. Fuel assembly
US4818478A (en) * 1987-12-07 1989-04-04 Westinghouse Electric Corp. BWR fuel assembly mini-bundle having interior fuel rods of reduced diameter

Also Published As

Publication number Publication date
FR1252674A (en) 1961-02-03
LU39505A1 (en) 1961-02-07
DE1439058A1 (en) 1968-11-07
NL258581A (en)
BE597707A (en)

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