GB1279447A - Nuclear reactor fuel assembly - Google Patents

Nuclear reactor fuel assembly

Info

Publication number
GB1279447A
GB1279447A GB47295/69A GB4729569A GB1279447A GB 1279447 A GB1279447 A GB 1279447A GB 47295/69 A GB47295/69 A GB 47295/69A GB 4729569 A GB4729569 A GB 4729569A GB 1279447 A GB1279447 A GB 1279447A
Authority
GB
United Kingdom
Prior art keywords
fuel
fissile
burnable poison
rods
initial
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
GB47295/69A
Inventor
William Vernon Macnabb
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.)
General Electric Co
Original Assignee
General Electric Co
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 General Electric Co filed Critical General Electric Co
Publication of GB1279447A publication Critical patent/GB1279447A/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
    • G21C3/326—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
    • G21C1/00—Reactor types
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C7/00—Control of nuclear reaction
    • G21C7/02—Control of nuclear reaction by using self-regulating properties of reactor materials, e.g. Doppler effect
    • G21C7/04—Control of nuclear reaction by using self-regulating properties of reactor materials, e.g. Doppler effect of burnable poisons
    • 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

1279447 Fuel elements GENERAL ELECTRIC CO 25 Sept 1969 [26 Sept 1968] 47295/69 Heading G6C A fuel assembly comprises a plurality of spaced, elongate fuel elements, a member containing burnable poison being provided within the assembly, the nuclear fuel of the fuel elements comprising an initial first fissile fuel and an initial second fissile fuel having greater fission cross-section than the first fissile fuel, the second fissile fuel being preferentially concentrated in at least the parts of the fuel elements adjacent the burnable poison, and the first fissile fuel being preferentially concentrated in at least some other parts of the fuel elements. Such a fuel assembly comprising spaced, parallel fuel rods 12 has the burnable poison in one of these fuel rods, viz. fuel rod 12<SP>1</SP>, and Pu-containing fuel in those fuel rods 12<SP>11</SP> surrounding the fuel rod 12<SP>1</SP> where the Pu will be within one neutron diffusion length of the burnable poison. The remainder of the fuel is U. Because of its greater fission cross-section, the initial power density in the Pu-containing fuel tends to be greater than in the U fuel, which helps to overcome the initial depressive effect of the adjacent burnable poison. Furthermore, the greater absorption cross-section of Pu causes it to deplete more rapidly than U which aids in preventing power peaking later in the fuel cycle. Satisfactory results are obtained when the fuel rods 12<SP>11</SP> contain about 1À2 atom per cent fissile Pu and 1À8 atom per cent fissile U. Where the fuel rod 12<SP>1</SP> contains the burnable poison only in one particular axial zone, then the Pu need be contained only in the same axial zone of the fuel rods 12<SP>11</SP>.
GB47295/69A 1968-09-26 1969-09-25 Nuclear reactor fuel assembly Expired GB1279447A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US76294668A 1968-09-26 1968-09-26

Publications (1)

Publication Number Publication Date
GB1279447A true GB1279447A (en) 1972-06-28

Family

ID=25066475

Family Applications (1)

Application Number Title Priority Date Filing Date
GB47295/69A Expired GB1279447A (en) 1968-09-26 1969-09-25 Nuclear reactor fuel assembly

Country Status (6)

Country Link
JP (1) JPS4818991B1 (en)
DE (1) DE1948819C3 (en)
ES (1) ES371529A1 (en)
FR (1) FR2019500A1 (en)
GB (1) GB1279447A (en)
SE (1) SE343707B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5572891A (en) * 1978-11-29 1980-06-02 Hitachi Ltd Reactor core structure
US4493814A (en) * 1982-05-11 1985-01-15 Westinghouse Electric Corp. High uranium utilization fuel rod for light water reactors

Also Published As

Publication number Publication date
JPS4818991B1 (en) 1973-06-09
ES371529A1 (en) 1977-09-16
DE1948819A1 (en) 1971-09-30
DE1948819B2 (en) 1977-09-15
FR2019500A1 (en) 1970-07-03
SE343707B (en) 1972-03-13
DE1948819C3 (en) 1978-05-24

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee