GB1303836A - - Google Patents
Info
- Publication number
- GB1303836A GB1303836A GB562370A GB562370A GB1303836A GB 1303836 A GB1303836 A GB 1303836A GB 562370 A GB562370 A GB 562370A GB 562370 A GB562370 A GB 562370A GB 1303836 A GB1303836 A GB 1303836A
- Authority
- GB
- United Kingdom
- Prior art keywords
- members
- band
- bridges
- fuel
- equal
- 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
- 239000000446 fuel Substances 0.000 abstract 6
- 239000002184 metal Substances 0.000 abstract 2
- 239000002826 coolant Substances 0.000 abstract 1
- 125000006850 spacer group Chemical group 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
- G21C3/34—Spacer grids
- G21C3/356—Spacer grids being provided with fuel element supporting members
- G21C3/3563—Supporting members formed only by deformations in the strips
-
- 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
- G21C3/34—Spacer grids
- G21C3/356—Spacer grids being provided with fuel element supporting members
-
- 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)
- Supports For Pipes And Cables (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Solid Fuels And Fuel-Associated Substances (AREA)
Abstract
1303836 Fuel elements COMITATO NAZIONALE PER L'ENERGIA NUCLEARE 5 Feb 1970 [6 Feb 1969] 5623/70 Heading G6C A spacer grid for use in a fuel element comprising an assembly of parallel, spaced fuel rods consists of laminar members disposed end-on to the coolant flow, the contact of the members with each fuel rod being along three generatrices thereof which are spaced at equal angles from one another, each rod being rigidly supported at two of the contact lines and elastically at the third. In the embodiment shown in Figs. 1 and 2, the grid is formed from two types of laminar members having the same height h and crossing each other at right angles. The members 2 of the first type, of which there are twice as many as of the second type, are made of a thin metal band along which at regular intervals equal to twice the side a of the square grid mesh, two parallel lengthwise incisions are made at a distance from the edges of the band equal to the band width. The band is then pressed in such a way that the portion between the two incisions forms a bridge projecting from one side of the band, while the other portions form similar narrower bridges projecting from the other side of the band. The members 3 of the second type are also made of a thin metal band which at regular intervals equal to the side a of the square grid mesh is incised and pressed similarly to member 2, the bridges however being shallower and having an outwardly arcuated profile for greater elasticity. The members 2, 3 are interlocked at right angles by means of vertical slits extending for ¢ their height, a short tubular element 14 provided with four slots 90 degrees apart being inserted at each crossing of the members 2, 3. Each fuel rod 1 abuts against the mesh structure along three generatrices of the rod for a length equal to ¢ L. The corners 4, 5 of the bridges of the members 2 provide rigid support while the ridges 6 of the profiled bridges of the members 3 provide elastically yielding support. In other embodiments, the bridges are formed by rectangular inserts with rounded off corners such as may be obtained by sawing a thinwalled tube of rectangular cross-section into sections (Fig. 4, not shown) and the structural members corresponding to the members 3 of the first embodiment comprise flat bands inserted between two bands corrugated in such a way that curved vertical ridges are obtained facing the fuel rods (Fig. 6, not shown).
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT3476269 | 1969-02-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1303836A true GB1303836A (en) | 1973-01-24 |
Family
ID=11239844
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB562370A Expired GB1303836A (en) | 1969-02-06 | 1970-02-05 |
Country Status (3)
Country | Link |
---|---|
DE (1) | DE2005061C3 (en) |
FR (1) | FR2030333B1 (en) |
GB (1) | GB1303836A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0065613A1 (en) * | 1981-05-14 | 1982-12-01 | Westinghouse Electric Corporation | Fuel pin support grid |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE794919A (en) * | 1972-02-04 | 1973-08-02 | Exxon Nuclear Co Inc | SPACER DEVICE FOR NUCLEAR REACTOR |
US4351795A (en) * | 1979-10-17 | 1982-09-28 | British Nuclear Fuels Limited | Grids for nuclear fuel assemblies |
Family Cites Families (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3380890A (en) * | 1964-06-03 | 1968-04-30 | Asea Ab | Spacer for fuel assemblies |
-
1970
- 1970-02-04 DE DE2005061A patent/DE2005061C3/en not_active Expired
- 1970-02-04 FR FR7003940A patent/FR2030333B1/fr not_active Expired
- 1970-02-05 GB GB562370A patent/GB1303836A/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0065613A1 (en) * | 1981-05-14 | 1982-12-01 | Westinghouse Electric Corporation | Fuel pin support grid |
Also Published As
Publication number | Publication date |
---|---|
FR2030333A1 (en) | 1970-11-13 |
DE2005061B2 (en) | 1977-11-17 |
FR2030333B1 (en) | 1974-05-03 |
DE2005061C3 (en) | 1978-07-06 |
DE2005061A1 (en) | 1970-09-03 |
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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 |