GB1059831A - Nuclear fuel element - Google Patents
Nuclear fuel elementInfo
- Publication number
- GB1059831A GB1059831A GB344/63A GB34463A GB1059831A GB 1059831 A GB1059831 A GB 1059831A GB 344/63 A GB344/63 A GB 344/63A GB 34463 A GB34463 A GB 34463A GB 1059831 A GB1059831 A GB 1059831A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fuel
- niobium
- expansion
- sheath
- washers
- 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
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
- G21C3/02—Fuel elements
- G21C3/04—Constructional details
- G21C3/16—Details of the construction within the casing
-
- 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)
- Vibration Dampers (AREA)
Abstract
1,059,831. Fuel elements. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. Dec. 13, 1963 [Jan. 3, 1963 (2)], Nos. 344/63 and 345/63. Heading G6C. A nuclear reactor fuel element comprises a tubular sheath within which is an axially extending stem on which nuclear fuel is located with a radial clearance existing between it and the sheath, the stem and sheath being engaged by spacers to locate them radially with respect to each other. The fuel element is for a fast reactor and accommodates both radial and axial expansion of the fuel. A series of tubular fuel segments 11 of molybdenum and enriched uranium are placed between inner and outer niobium tubes 12, 13, and located by the inner tube. Above the fuel is a breeder segment 14 of natural uranium. The sheathing is closed by top and bottom welded plugs 15, 16 of niobium and the space between the segments and sheathing contains a thin film of liquid sodium to improve heat transfer. Radial expansion is accommodated by a clearance 17, sufficient to accommodate an 8% increase in fuel diameter. The inner tube 12 is located radially by niobium washers 18 which are a close fit between the inner and outer tubes; the washers also prevent the inner sheath bowing. Axial expansion of two types is accommodated by two separate units. Cyclic thermal expansion (and contraction) is accommodated by means of a spring 19 between two niobium washers, and a stack of cupped stainless steel rings 23, against an abutment formed by a nickel cylinder 22. When fuel expansion due to burn-up is imposed on a thermal expansion so as to fully compress the spring 19 and the rings 23, the cylinder 22 is forced to move upwards against the resistance of its interference fit with a niobium piston 24, 25 integral with the end cap 15. The available relative movement between the piston and cylinder is sufficient to accommodate an 8% increase in the axial length of the fuel, against an interference load of 150-400 1b. An overload shear section 26 in the piston is intended to break under a load of 880-980 1b.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR139962D FR139962A (en) | 1963-01-03 | ||
| GB344/63A GB1059831A (en) | 1963-01-03 | 1963-01-03 | Nuclear fuel element |
| FR959191A FR1379962A (en) | 1963-01-03 | 1964-01-02 | Nuclear fuel cartridges |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB344/63A GB1059831A (en) | 1963-01-03 | 1963-01-03 | Nuclear fuel element |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1059831A true GB1059831A (en) | 1967-02-22 |
Family
ID=9702745
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB344/63A Expired GB1059831A (en) | 1963-01-03 | 1963-01-03 | Nuclear fuel element |
Country Status (2)
| Country | Link |
|---|---|
| FR (1) | FR139962A (en) |
| GB (1) | GB1059831A (en) |
-
0
- FR FR139962D patent/FR139962A/fr active Active
-
1963
- 1963-01-03 GB GB344/63A patent/GB1059831A/en not_active Expired
Also Published As
| Publication number | Publication date |
|---|---|
| FR139962A (en) |
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