FR2429476A1 - Absorbent needle for assembly in reactor control rod - has metal sleeve crimped and not welded to plugs - Google Patents
Absorbent needle for assembly in reactor control rod - has metal sleeve crimped and not welded to plugsInfo
- Publication number
- FR2429476A1 FR2429476A1 FR7818824A FR7818824A FR2429476A1 FR 2429476 A1 FR2429476 A1 FR 2429476A1 FR 7818824 A FR7818824 A FR 7818824A FR 7818824 A FR7818824 A FR 7818824A FR 2429476 A1 FR2429476 A1 FR 2429476A1
- Authority
- FR
- France
- Prior art keywords
- plugs
- welded
- absorbent
- assembly
- plug
- 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.)
- Granted
Links
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C7/00—Control of nuclear reaction
- G21C7/06—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section
- G21C7/08—Control of nuclear reaction by application of neutron-absorbing material, i.e. material with absorption cross-section very much in excess of reflection cross-section by displacement of solid control elements, e.g. control rods
- G21C7/10—Construction of control elements
- G21C7/103—Control assemblies containing one or more absorbants as well as other elements, e.g. fuel or moderator 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
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
Abstract
The metal sleeve and its plugs forming an absorbent needle for assembly into a nuclear reactor, are crimped together, the surface of the plug having undulations into which the sleeve mantle is compressed. The absorbent needles are assembled in gps. in a hollow housing through which the cooling liq. metal circulates, and one plug at least is, during service, exposed to an intense flux of neutrons. When the plugs are welded, the metallurgical structure of the sleeve is altered and the metal swells after exposure to the neutron flux. The crimping operation prevents the circulation of the coolant being obstructed and/or loss of the absorbent material with the plug.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7818824A FR2429476A1 (en) | 1978-06-23 | 1978-06-23 | Absorbent needle for assembly in reactor control rod - has metal sleeve crimped and not welded to plugs |
IT23766/79A IT1121594B (en) | 1978-06-23 | 1979-06-21 | NEEDLE OF AN ABSORBENT COMPLEX FOR NUCLEAR REACTOR |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR7818824A FR2429476A1 (en) | 1978-06-23 | 1978-06-23 | Absorbent needle for assembly in reactor control rod - has metal sleeve crimped and not welded to plugs |
Publications (2)
Publication Number | Publication Date |
---|---|
FR2429476A1 true FR2429476A1 (en) | 1980-01-18 |
FR2429476B1 FR2429476B1 (en) | 1981-10-16 |
Family
ID=9209909
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
FR7818824A Granted FR2429476A1 (en) | 1978-06-23 | 1978-06-23 | Absorbent needle for assembly in reactor control rod - has metal sleeve crimped and not welded to plugs |
Country Status (2)
Country | Link |
---|---|
FR (1) | FR2429476A1 (en) |
IT (1) | IT1121594B (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3835711A1 (en) * | 1988-10-20 | 1990-04-26 | Bbc Reaktor Gmbh | CONTROL STAFF TO INFLUENCE THE REACTIVITY OF A CORE REACTOR AND ARRANGEMENT OF SEVERAL THESE STEERING STEELS TO A CONTROL UNIT |
FR2788161A1 (en) * | 1998-12-30 | 2000-07-07 | Framatome Sa | ABSORBENT PENCIL FOR NUCLEAR REACTOR CONTROL CLUSTER |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1313033A (en) * | 1961-02-06 | 1962-12-21 | Atomic Energy Commission | New type of control rod for nuclear reactors |
FR1475174A (en) * | 1965-11-12 | 1967-03-31 | Euratom | Tight fixing of a fuel element sheath on its plug |
FR91259E (en) * | 1966-09-02 | 1968-05-17 | Atomic Energy Authority Uk | Fuel cartridges for nuclear reactors |
DE1564632A1 (en) * | 1966-06-18 | 1970-01-22 | Siemens Ag | Termination of zirconium-encased nuclear reactor fuel rods |
-
1978
- 1978-06-23 FR FR7818824A patent/FR2429476A1/en active Granted
-
1979
- 1979-06-21 IT IT23766/79A patent/IT1121594B/en active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1313033A (en) * | 1961-02-06 | 1962-12-21 | Atomic Energy Commission | New type of control rod for nuclear reactors |
FR1475174A (en) * | 1965-11-12 | 1967-03-31 | Euratom | Tight fixing of a fuel element sheath on its plug |
DE1564632A1 (en) * | 1966-06-18 | 1970-01-22 | Siemens Ag | Termination of zirconium-encased nuclear reactor fuel rods |
FR91259E (en) * | 1966-09-02 | 1968-05-17 | Atomic Energy Authority Uk | Fuel cartridges for nuclear reactors |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3835711A1 (en) * | 1988-10-20 | 1990-04-26 | Bbc Reaktor Gmbh | CONTROL STAFF TO INFLUENCE THE REACTIVITY OF A CORE REACTOR AND ARRANGEMENT OF SEVERAL THESE STEERING STEELS TO A CONTROL UNIT |
FR2788161A1 (en) * | 1998-12-30 | 2000-07-07 | Framatome Sa | ABSORBENT PENCIL FOR NUCLEAR REACTOR CONTROL CLUSTER |
WO2000041183A1 (en) * | 1998-12-30 | 2000-07-13 | Framatome | Absorbent pencil for nuclear reactor control cluster |
JP2002534693A (en) * | 1998-12-30 | 2002-10-15 | フラマトム | Reactor absorption rod |
Also Published As
Publication number | Publication date |
---|---|
IT7923766A0 (en) | 1979-06-21 |
FR2429476B1 (en) | 1981-10-16 |
IT1121594B (en) | 1986-04-02 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
ST | Notification of lapse | ||
ST | Notification of lapse |