GB1279447A - Nuclear reactor fuel assembly - Google Patents
Nuclear reactor fuel assemblyInfo
- 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
Links
- 239000003758 nuclear fuel Substances 0.000 title abstract 2
- 239000000446 fuel Substances 0.000 abstract 25
- 239000002574 poison Substances 0.000 abstract 6
- 231100000614 poison Toxicity 0.000 abstract 6
- 230000004992 fission Effects 0.000 abstract 2
- 238000010521 absorption reaction Methods 0.000 abstract 1
- 230000003001 depressive effect Effects 0.000 abstract 1
- 238000009792 diffusion process Methods 0.000 abstract 1
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
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)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
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>.
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)
| 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 |
-
1969
- 1969-09-12 JP JP44072033A patent/JPS4818991B1/ja active Pending
- 1969-09-13 ES ES371529A patent/ES371529A1/en not_active Expired
- 1969-09-25 GB GB47295/69A patent/GB1279447A/en not_active Expired
- 1969-09-25 SE SE13192/69A patent/SE343707B/xx unknown
- 1969-09-26 FR FR6933011A patent/FR2019500A1/fr not_active Withdrawn
- 1969-09-26 DE DE1948819A patent/DE1948819C3/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| ES371529A1 (en) | 1977-09-16 |
| SE343707B (en) | 1972-03-13 |
| DE1948819B2 (en) | 1977-09-15 |
| DE1948819C3 (en) | 1978-05-24 |
| JPS4818991B1 (en) | 1973-06-09 |
| FR2019500A1 (en) | 1970-07-03 |
| DE1948819A1 (en) | 1971-09-30 |
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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 |