GB1253912A - Reactivity and power distribution control of a nuclear reactor core - Google Patents
Reactivity and power distribution control of a nuclear reactor coreInfo
- Publication number
- GB1253912A GB1253912A GB00385/69A GB1038569A GB1253912A GB 1253912 A GB1253912 A GB 1253912A GB 00385/69 A GB00385/69 A GB 00385/69A GB 1038569 A GB1038569 A GB 1038569A GB 1253912 A GB1253912 A GB 1253912A
- Authority
- GB
- United Kingdom
- Prior art keywords
- poison
- fuel
- reactivity
- burnable poison
- burnable
- 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
Links
- 230000009257 reactivity Effects 0.000 title abstract 7
- 239000002574 poison Substances 0.000 abstract 19
- 231100000614 poison Toxicity 0.000 abstract 19
- 239000000446 fuel Substances 0.000 abstract 8
- 230000007423 decrease Effects 0.000 abstract 4
- 239000000463 material Substances 0.000 abstract 4
- 239000008188 pellet Substances 0.000 abstract 2
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003758 nuclear fuel Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 239000006104 solid solution Substances 0.000 abstract 1
Classifications
-
- 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
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C5/00—Moderator or core structure; Selection of materials for use as moderator
-
- 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
1,253,912. Controlling reactors. GENERAL ELECTRIC CO. 26 Feb., 1969 [26 Feb., 1968], No. 10385/69. Heading G6C. In order to provide an arrangement of burnable poison in a nuclear reactor core which will provide a substantially stationary power distribution in the core throughout the operating cycle, the reactor core is zoned to provide a step-function approximation to the ideal poison distribution. The density of the burnable poison is sufficient to provide effective self-shielding. The burnable poison is formed in a geometrical configuration such that as it is depleted with exposure, the surface area of the poison and hence the reactivity controlled by the poison decreases in a manner to match the decrease in reactivity of the nuclear fuel with exposure. The initial amount of the surface area of the burnable poison in each zone is selected to compensate for the initial excess reactivity to be controlled in the zone. The initial number of atoms of the burnable poison in each zone is selected to provide substantially complete burn up at the exposure to be experienced in the zone during the operating cycle. In the embodiment described, the core is formed of a plurality of fuel assemblies, each comprising a tubular flow channel containing an array of fuel elements supported between upper and lower tie plates. The burnable poison may be formed in separate rods or elements, cylinders of the poison material may be placed within annular fuel pallets or rods, rod-shaped particles of poison material may be dispersed in the fuel, or the poison material may be molecularly dispersed in the fuel. Suitable poison materials include B, Sm and Gd. In an example, 0À95 to 1À55 wt. per cent Gd 2 O 3 was mixed with UO 2 to form a solid solution and then prepared as pellets for loading into the fuel elements. The required distribution of burnable poison was obtained using pellets of only three different poison densities. The burnable poison was formed in a cylindrical configuration to provide a linear decrease in control strength which matches the typical linear decrease in reactivity of the fuel in large power reactors. Other configurations may be used, however, such as self-shielding burnable poison in a spherical configuration which provides reactivity control decreasing more rapidly with exposure during the early part of the fuel cycle than during the later part, and a relatively thin strip or slab of self-shielding burnable poison which provides reactivity control substantially constant with exposure with a rapid drop in control worth occurring as complete burn up of the poison is approached.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US70839168A | 1968-02-26 | 1968-02-26 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1253912A true GB1253912A (en) | 1971-11-17 |
Family
ID=24845617
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB00385/69A Expired GB1253912A (en) | 1968-02-26 | 1969-02-26 | Reactivity and power distribution control of a nuclear reactor core |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS5112793B1 (en) |
BE (1) | BE728620A (en) |
CH (1) | CH505441A (en) |
DE (1) | DE1909109A1 (en) |
FR (1) | FR2002640A1 (en) |
GB (1) | GB1253912A (en) |
IL (1) | IL31530A (en) |
NL (1) | NL6902295A (en) |
SE (1) | SE349180B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2939415A1 (en) * | 1979-09-28 | 1981-04-02 | Kraftwerk Union AG, 4330 Mülheim | METHOD FOR PRODUCING HIGH DENSITY OXIDIC FUEL FIBER BODIES |
ES2264889A1 (en) * | 2005-06-27 | 2007-01-16 | Enusa Industrias Avanzadas, S.A. | Fuel element for pressurised water nuclear reactors and method of loading fuel elements into a nuclear reactor core |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE377216B (en) * | 1973-06-26 | 1975-06-23 | Asea Atom Ab | |
JPS5149391A (en) * | 1974-10-28 | 1976-04-28 | Hitachi Ltd | |
DE2456019C2 (en) * | 1974-11-27 | 1985-11-28 | INTERATOM GmbH, 5060 Bergisch Gladbach | Nuclear reactor with a fixed system of combustible neutron poison introduced into the reactor core |
JPS5572891A (en) * | 1978-11-29 | 1980-06-02 | Hitachi Ltd | Reactor core structure |
DE3127187C2 (en) * | 1981-07-09 | 1983-11-10 | Einkaufszentrale für öffentliche Bibliotheken GmbH, 7410 Reutlingen | Shelf for books |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
NL297402A (en) * | 1962-09-05 | 1900-01-01 | ||
FR1421433A (en) * | 1963-10-31 | 1965-12-17 | Gen Dynamics Corp | High temperature nuclear reactor |
GB1077385A (en) * | 1964-09-09 | 1967-07-26 | Ca Atomic Energy Ltd | An improved method of operating a nuclear reactor |
-
1969
- 1969-01-31 IL IL31530A patent/IL31530A/en unknown
- 1969-02-13 NL NL6902295A patent/NL6902295A/xx unknown
- 1969-02-18 JP JP44011557A patent/JPS5112793B1/ja active Pending
- 1969-02-19 BE BE728620D patent/BE728620A/xx unknown
- 1969-02-24 SE SE02519/69A patent/SE349180B/xx unknown
- 1969-02-24 DE DE19691909109 patent/DE1909109A1/en active Pending
- 1969-02-26 CH CH288769A patent/CH505441A/en not_active IP Right Cessation
- 1969-02-26 GB GB00385/69A patent/GB1253912A/en not_active Expired
- 1969-02-26 FR FR6904973A patent/FR2002640A1/en active Granted
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2939415A1 (en) * | 1979-09-28 | 1981-04-02 | Kraftwerk Union AG, 4330 Mülheim | METHOD FOR PRODUCING HIGH DENSITY OXIDIC FUEL FIBER BODIES |
ES2264889A1 (en) * | 2005-06-27 | 2007-01-16 | Enusa Industrias Avanzadas, S.A. | Fuel element for pressurised water nuclear reactors and method of loading fuel elements into a nuclear reactor core |
Also Published As
Publication number | Publication date |
---|---|
CH505441A (en) | 1971-03-31 |
FR2002640A1 (en) | 1969-10-31 |
NL6902295A (en) | 1969-08-28 |
FR2002640B1 (en) | 1973-12-21 |
JPS5112793B1 (en) | 1976-04-22 |
DE1909109A1 (en) | 1969-09-18 |
SE349180B (en) | 1972-09-18 |
IL31530A (en) | 1973-03-30 |
BE728620A (en) | 1969-08-19 |
IL31530A0 (en) | 1969-03-27 |
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