EP0943147A1 - Assembly of nuclear fuel rods bundle - Google Patents
Assembly of nuclear fuel rods bundleInfo
- Publication number
- EP0943147A1 EP0943147A1 EP97947178A EP97947178A EP0943147A1 EP 0943147 A1 EP0943147 A1 EP 0943147A1 EP 97947178 A EP97947178 A EP 97947178A EP 97947178 A EP97947178 A EP 97947178A EP 0943147 A1 EP0943147 A1 EP 0943147A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- rod
- puller rod
- nuclear fuel
- puller
- carbon fibre
- 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.)
- Withdrawn
Links
- 239000003758 nuclear fuel Substances 0.000 title claims abstract description 11
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 15
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 14
- 239000000835 fiber Substances 0.000 claims abstract description 13
- 239000008188 pellet Substances 0.000 claims abstract description 3
- 238000007747 plating Methods 0.000 claims description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 claims description 4
- 239000011253 protective coating Substances 0.000 claims description 4
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 claims description 3
- 229910052804 chromium Inorganic materials 0.000 claims description 3
- 239000011651 chromium Substances 0.000 claims description 3
- 229910052751 metal Inorganic materials 0.000 claims description 3
- 239000002184 metal Substances 0.000 claims description 3
- 229910052759 nickel Inorganic materials 0.000 claims description 2
- 239000000446 fuel Substances 0.000 description 11
- 229910000831 Steel Inorganic materials 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 150000001721 carbon Chemical class 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 210000002421 cell wall Anatomy 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000007769 metal material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 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
- G21C3/334—Assembling, maintenance or repair of the bundles
-
- 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
Definitions
- This invention relates to apparatus for building nuclear fuel elements in which a plurality of nuclear fuel rods, containing nuclear fuel pellets, are loaded into support skeletons in the form of spaced apart grids.
- this invention relates to the assembly of fuel elements for use in a Pressurised Water Reactor (PWR) which makes use of fuel rods that are both long and slender. If such rods were to be pushed into the skeleton, they would tend to buckle due to their inherent weakness. Accordingly, they are in fact loaded into the skeleton by pulling them.
- a device known as a puller rod is used. The puller rod is passed through the grids of the skeleton and the lead end is caused to engage an end of the fuel rod. The puller rod is then pulled back through the skeleton, thereby pulling the fuel rod into position within the skeleton.
- the present invention is particularly concerned with puller rods.
- the puller rod typically comprises a steel tube of metallic material.
- a typical puller rod might be 4m in length and about 8mm in diameter and, because of its length and slenderness, it has a large inherent deformation. This deformation continues throughout its period of use due to the significant deflection forces during loading.
- the lead end of the puller rod is unsupported for a distance which, at its maximum, is the distance between adjacent grids of the skeleton.
- This distance may be of the order of 0.5m and can be sufficient for the leading end of the puller rod, which is unsupported, to droop sufficiently for it to become misaligned and, therefore, for its front end not to enter the hole or cell in the next grid. Instead, the front end of the puller rod will strike the cell wall and be damaged, or damage the grid, or both.
- a puller rod having a tubular body, at least the forward or leading portion of said body being made of carbon fibre.
- a puller rod of the present invention may include a tubular body made entirely of carbon fibre. However, it is preferred that only the leading or forward section of the tubular body be made of carbon fibre since it is the leading end, carrying the collet which is cantilevered as the rod advances from one grid in the skeleton to the next.
- the protective coating is a metal plating such as electro-less nickel plating or chromium plating.
- Figure 1 shows the forward or leading end of a puller rod
- Figure 2 illustrates the forces acting on a puller rod while it is in use.
- FIG. 1 There is illustrated in Figure 1 the leading or forward end of a puller rod 1 which is in the form of a tube 3 having a collet 5 provided with tines 7. Located within tube 3 is a rod 9 which, in use, is moved forward relative to tube 3 in order to force apart tines 7 when the puller rod has engaged the end of a fuel rod.
- the tube 3 of puller rod 1 is formed partly of steel and partly of carbon fibre.
- the carbon fibre section is the forward or leading end of the puller rod and extends over about one third of its length. This carbon fibre section is chromium plated on its outer surface.
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)
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9625517.9A GB9625517D0 (en) | 1996-12-09 | 1996-12-09 | Assembly of nuclear fuel elements |
| GB9625517 | 1996-12-09 | ||
| PCT/GB1997/003341 WO1998026425A1 (en) | 1996-12-09 | 1997-12-03 | Assembly of nuclear fuel rods bundle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP0943147A1 true EP0943147A1 (en) | 1999-09-22 |
Family
ID=10804146
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP97947178A Withdrawn EP0943147A1 (en) | 1996-12-09 | 1997-12-03 | Assembly of nuclear fuel rods bundle |
Country Status (8)
| Country | Link |
|---|---|
| EP (1) | EP0943147A1 (ko) |
| JP (1) | JP2001506003A (ko) |
| KR (1) | KR20000069365A (ko) |
| CN (1) | CN1240044A (ko) |
| AU (1) | AU5232798A (ko) |
| CA (1) | CA2274501A1 (ko) |
| GB (1) | GB9625517D0 (ko) |
| WO (1) | WO1998026425A1 (ko) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104148529B (zh) * | 2014-07-25 | 2016-05-11 | 中国核电工程有限公司 | 自动安全脱钩机构 |
| CN107204209B (zh) * | 2017-05-22 | 2019-01-29 | 彭州市长庆全成技术开发有限公司 | 用于核燃料芯块装填的导向装置 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AT383319B (de) * | 1982-09-07 | 1987-06-25 | Fischer Gmbh | Rohrfoermiger hohlkoerper aus faserverstaerktem kunststoff, insbesondere strukturbauteil fuer ein fahrzeug, zur uebertragung von druck-,zug-,biege- und torsionskraeften |
| US5251243A (en) * | 1992-08-21 | 1993-10-05 | Westinghouse Electric Corp. | Automatic fuel assembly loader |
| FR2696511B1 (fr) * | 1992-10-02 | 1994-11-04 | Electricite De France | Perche télescopique. |
-
1996
- 1996-12-09 GB GBGB9625517.9A patent/GB9625517D0/en active Pending
-
1997
- 1997-12-03 CN CN97180455A patent/CN1240044A/zh active Pending
- 1997-12-03 KR KR1019997005082A patent/KR20000069365A/ko not_active Application Discontinuation
- 1997-12-03 AU AU52327/98A patent/AU5232798A/en not_active Abandoned
- 1997-12-03 CA CA002274501A patent/CA2274501A1/en not_active Abandoned
- 1997-12-03 WO PCT/GB1997/003341 patent/WO1998026425A1/en not_active Application Discontinuation
- 1997-12-03 EP EP97947178A patent/EP0943147A1/en not_active Withdrawn
- 1997-12-03 JP JP52634998A patent/JP2001506003A/ja active Pending
Non-Patent Citations (1)
| Title |
|---|
| See references of WO9826425A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| GB9625517D0 (en) | 1997-01-29 |
| WO1998026425A1 (en) | 1998-06-18 |
| AU5232798A (en) | 1998-07-03 |
| CN1240044A (zh) | 1999-12-29 |
| CA2274501A1 (en) | 1998-06-18 |
| JP2001506003A (ja) | 2001-05-08 |
| KR20000069365A (ko) | 2000-11-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
| 17P | Request for examination filed |
Effective date: 19990607 |
|
| AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): BE DE ES FR GB SE |
|
| STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN |
|
| 18D | Application deemed to be withdrawn |
Effective date: 20030701 |