GB1306939A - Nuclear reactors - Google Patents
Nuclear reactorsInfo
- Publication number
- GB1306939A GB1306939A GB3432169A GB1306939DA GB1306939A GB 1306939 A GB1306939 A GB 1306939A GB 3432169 A GB3432169 A GB 3432169A GB 1306939D A GB1306939D A GB 1306939DA GB 1306939 A GB1306939 A GB 1306939A
- Authority
- GB
- United Kingdom
- Prior art keywords
- zirconium
- fuel
- cladding
- wear pads
- mask
- 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 9
- 238000005253 cladding Methods 0.000 abstract 6
- 239000000463 material Substances 0.000 abstract 5
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 abstract 3
- 239000000919 ceramic Substances 0.000 abstract 2
- 229910052751 metal Inorganic materials 0.000 abstract 2
- 239000002184 metal Substances 0.000 abstract 2
- 150000002739 metals Chemical class 0.000 abstract 2
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 abstract 2
- 239000000843 powder Substances 0.000 abstract 2
- 229910052726 zirconium Inorganic materials 0.000 abstract 2
- 229910001928 zirconium oxide Inorganic materials 0.000 abstract 2
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 229910001093 Zr alloy Inorganic materials 0.000 abstract 1
- 230000000712 assembly Effects 0.000 abstract 1
- 238000000429 assembly Methods 0.000 abstract 1
- 238000005422 blasting Methods 0.000 abstract 1
- 239000002826 coolant Substances 0.000 abstract 1
- 150000004678 hydrides Chemical class 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 239000003758 nuclear fuel Substances 0.000 abstract 1
- 238000007750 plasma spraying Methods 0.000 abstract 1
- 125000006850 spacer group Chemical group 0.000 abstract 1
- 238000005507 spraying Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 1
- QSGNKXDSTRDWKA-UHFFFAOYSA-N zirconium dihydride Chemical compound [ZrH2] QSGNKXDSTRDWKA-UHFFFAOYSA-N 0.000 abstract 1
- 229910000568 zirconium hydride Inorganic materials 0.000 abstract 1
- ZVWKZXLXHLZXLS-UHFFFAOYSA-N zirconium nitride Chemical compound [Zr]#N ZVWKZXLXHLZXLS-UHFFFAOYSA-N 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
- G21C3/02—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
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C4/00—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge
- C23C4/04—Coating by spraying the coating material in the molten state, e.g. by flame, plasma or electric discharge characterised by the coating material
- C23C4/10—Oxides, borides, carbides, nitrides or silicides; Mixtures thereof
-
- 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
-
- 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
- G21C3/344—Spacer grids formed of assembled tubular elements
-
- 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
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Coating By Spraying Or Casting (AREA)
Abstract
1306939 Fuel elements BRITISH NUCLEAR FUELS 11 Sept 1970 [8 July 1969] 34321/69 Heading G6C The fuel pins 3 of a fuel assembly each pass through a ring 7 of a spacer grid formed from a plurality of such rings brazed or welded to each other and to radial braces 4. Wear pads 6 having a length slightly greater than the width of the ring 7 are formed on the fuel cladding 3a where a fuel pin 3 passes through a ring 7. In the embodiment described, four wear pads 6 are used, but three or more than four may be used, as also may a single pad encircling the cladding. The cladding is preferably of a zirconium alloy and the wear pads are preferably of zirconium oxide. The material of which the wear pads are made is deposited by means of a conventional plasma spraying technique. The areas on which material is to be sprayed are prepared by grit blasting. Each area is defined by means of a mask. The material is plasmasprayed through the mask, a plurality of passes being made over the area defined by the mask. At least that area of the cladding on which material is sprayed is cooled during the spraying, e.g. by circulating a coolant such as water through the cladding. The wear pads are formed before the cladding is filled with fuel. As an alternative to zirconium oxide, zirconium may be used for the wear pads in which case zirconium hydride powder is fed to the plasma gun. The hydride dissociates at 750 C. into zirconium metal and hydrogen. Other suitable materials for the wear pads are zirconium nitride and other zirconium ceramic powders. Alternatively, metals and/or mixtures of metals and ceramics may be used. Although described with particular reference to a multi-pin type fuel assembly, the invention is also applicable to multi-plate type fuel assemblies, and to single pin or plate fuel elements.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3432169 | 1969-07-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1306939A true GB1306939A (en) | 1973-02-14 |
Family
ID=10364189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3432169A Expired GB1306939A (en) | 1969-07-08 | 1969-07-08 | Nuclear reactors |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1306939A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4056441A (en) * | 1975-01-20 | 1977-11-01 | Commissariat A L'energie Atomique | Bracing device for a bundle of parallel pins in a nuclear reactor assembly |
| EP0614195A1 (en) * | 1993-03-02 | 1994-09-07 | Westinghouse Electric Corporation | Fret resistant fuel rod with zirconium oxide layer |
-
1969
- 1969-07-08 GB GB3432169A patent/GB1306939A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4056441A (en) * | 1975-01-20 | 1977-11-01 | Commissariat A L'energie Atomique | Bracing device for a bundle of parallel pins in a nuclear reactor assembly |
| EP0614195A1 (en) * | 1993-03-02 | 1994-09-07 | Westinghouse Electric Corporation | Fret resistant fuel rod with zirconium oxide layer |
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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 |