GB960813A - Device for centring fuel elements in nuclear reactors - Google Patents
Device for centring fuel elements in nuclear reactorsInfo
- Publication number
- GB960813A GB960813A GB15560/63A GB1556063A GB960813A GB 960813 A GB960813 A GB 960813A GB 15560/63 A GB15560/63 A GB 15560/63A GB 1556063 A GB1556063 A GB 1556063A GB 960813 A GB960813 A GB 960813A
- Authority
- GB
- United Kingdom
- Prior art keywords
- blades
- sheath
- centring
- sleeve
- fuel
- 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
- G21C3/06—Casings; Jackets
- G21C3/12—Means forming part of the element for locating it within the reactor core
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/02—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices
- G21C15/04—Arrangements or disposition of passages in which heat is transferred to the coolant; Coolant flow control devices from fissile or breeder material
-
- 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
- G21C3/06—Casings; Jackets
- G21C3/08—Casings; Jackets provided with external means to promote heat-transfer, e.g. fins, baffles
-
- 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
- G21C3/38—Fuel units consisting of a single fuel element in a supporting sleeve or in another supporting element
-
- 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)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
960, 813. Nuclear fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. April 19, 1963 [April 20, 1962; July 20, 1962], No. 15560/63. Heading G6C. A device for centring a fuel element provided with an external sheath comprising fins arranged in herringbone form in relation to an annular structure surrounding the element is composed of at least three centring blades, of which the centre planes are directed towards the axis of the element, and which are fast with the structure and in contact with the sheath, or vice versa. As shown in Fig. 7, the fuel element 2 comprises a tube 4 of fuel material, e.g. pure or lightly alloyed uranium, closed at each end by a uranium pellet 6 and enclosed in a sheath 8 on the outside surface of which are fins 17 arranged in series forming herringbone patterns with a longitudinal groove 18 between each two successive series. There are three centring blades 20 engaging three alternate grooves 18. The sheath 8 may, for example, be of Mg-Zr alloy of low Zr content and is closed by welded plugs 14 which may, for example, be of Mg-Mn alloy of very low Mn content. The element is supported within an annular sleeve 26 to form a fuel cartridge by means of a central plug 30 suspended in the sleeve by a series of crossed wires 32. These wires have sufficient flexibility to damp the shocks to which the element 2 is subjected during loading and unloading operations. In this construction, the blades 20 are prevented from rotating within the sleeve 26 by being engaged within longitudinal slots 34 in the inside wall of the sleeve. In addition, the blades 20 are prevented from slipping in a direction parallel to the axis of the element by means of teeth 24 integral with the blades which engage in radial recesses 36 of greater depth than the corresponding slots 34. Alternatively, the blades 20 may be directly welded to the sheath 8 or to the sleeve 26. Since herringbone-type sheaths eliminate the aerodynamic forces which tend to turn the fuel element within the coolant channel, the gas flows which they induce being symmetrical in pairs, the centring blades 20 have to exert no opposing torque and it is sufficient for them to have adequate rigidity in the longitudinal and radial directions. In order to reduce the neutron absorbtion, the blades are provided with recesses 22 either of semicircular, trapezoidal or rectangular form, or as simple holes in the blade. Advantageously, the blades 20 are tapered inwardly at their edges engaged in the longitudinal'grooves 18 of the sheath.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR895309A FR1328540A (en) | 1962-04-20 | 1962-04-20 | Centering device for nuclear reactor fuel element |
FR904701A FR1339587A (en) | 1962-04-20 | 1962-07-20 | Fuel cell for nuclear reactor |
Publications (1)
Publication Number | Publication Date |
---|---|
GB960813A true GB960813A (en) | 1964-06-17 |
Family
ID=26195342
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB15560/63A Expired GB960813A (en) | 1962-04-20 | 1963-04-19 | Device for centring fuel elements in nuclear reactors |
Country Status (6)
Country | Link |
---|---|
BE (1) | BE631312A (en) |
CH (1) | CH406459A (en) |
DE (1) | DE1295711B (en) |
FR (2) | FR1328540A (en) |
GB (1) | GB960813A (en) |
LU (1) | LU43592A1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278389A (en) * | 1964-01-21 | 1966-10-11 | Commissariat Energie Atomique | Fuel element for nuclear reactors |
US4274920A (en) * | 1977-04-13 | 1981-06-23 | Gibbs & Hill, Inc. | Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1408832A (en) * | 1964-07-07 | 1965-08-20 | Commissariat Energie Atomique | Self-centering support for nuclear fuel cartridge |
FR1408831A (en) * | 1964-07-07 | 1965-08-20 | Commissariat Energie Atomique | Support device for nuclear fuel elements |
FR2943166B1 (en) * | 2009-03-11 | 2012-10-05 | Commissariat Energie Atomique | NUCLEAR FUEL STORAGE CASE WITH FACILITATED CLOSURE. |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB856740A (en) * | 1956-09-05 | 1960-12-21 | English Electric Co Ltd | Improvements relating to fuel element cans for nuclear reactors |
FR1210319A (en) * | 1958-09-18 | 1960-03-08 | Commissariat Energie Atomique | Further development of fuel element supports in vertical channel atomic cells |
FR1215911A (en) * | 1958-11-22 | 1960-04-21 | Commissariat Energie Atomique | Further development of fuel element supports in vertical channel atomic cells |
FR1289281A (en) * | 1960-05-17 | 1962-03-30 | Babcock & Wilcox Ltd | Enhancements to the sheaths or shields of nuclear fuel cartridges |
-
0
- BE BE631312D patent/BE631312A/xx unknown
-
1962
- 1962-04-20 FR FR895309A patent/FR1328540A/en not_active Expired
- 1962-07-20 FR FR904701A patent/FR1339587A/en not_active Expired
-
1963
- 1963-04-18 CH CH487763A patent/CH406459A/en unknown
- 1963-04-19 LU LU43592D patent/LU43592A1/xx unknown
- 1963-04-19 DE DEC29699A patent/DE1295711B/en active Pending
- 1963-04-19 GB GB15560/63A patent/GB960813A/en not_active Expired
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3278389A (en) * | 1964-01-21 | 1966-10-11 | Commissariat Energie Atomique | Fuel element for nuclear reactors |
US4274920A (en) * | 1977-04-13 | 1981-06-23 | Gibbs & Hill, Inc. | Water-cooled nuclear reactor with passive emergency shutdown and core cooling capability and on-line refueling |
Also Published As
Publication number | Publication date |
---|---|
FR1339587A (en) | 1963-10-11 |
DE1295711B (en) | 1969-05-22 |
BE631312A (en) | |
CH406459A (en) | 1966-01-31 |
FR1328540A (en) | 1963-05-31 |
LU43592A1 (en) | 1963-06-19 |
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