IE810175L - Screw and nut mechanism for controlling a nuclear reactor - Google Patents
Screw and nut mechanism for controlling a nuclear reactorInfo
- Publication number
- IE810175L IE810175L IE810175A IE17581A IE810175L IE 810175 L IE810175 L IE 810175L IE 810175 A IE810175 A IE 810175A IE 17581 A IE17581 A IE 17581A IE 810175 L IE810175 L IE 810175L
- Authority
- IE
- Ireland
- Prior art keywords
- screw
- nut assembly
- rotationally movable
- reactor
- component
- Prior art date
Links
- 238000006073 displacement reaction Methods 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
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
- G21C7/12—Means for moving control elements to desired position
- G21C7/14—Mechanical drive arrangements
-
- 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
- G21C7/12—Means for moving control elements to desired position
-
- 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)
- Transmission Devices (AREA)
- Manipulator (AREA)
Abstract
1. A screw and nut mechanism comprising a screw-nut assembly for controlling a nuclear reactor by vertical displacement of a unit absorbing the neutrons in the core of the reactor and fall of the absorbing unit into a position of maximum insertion under the action of its own weight, for emergency stoppage, the absorbing unit being fixed at the lower end of a shaft connected to one of the vertically translationally movable components of the screw-nut assembly (12, 15-16), the other, rotationally movable, component of the screw-nut assembly being capable of being immobilised in translation, and the mechanism comprising, - a motor (4) for driving in rotation the rotationally movable component (15-16) of the screw and nut assembly (12, 15-16), through the intermediacy of a driving element (20, 24) comprising a profiled part intended to engage with a corresponding part of the rotationally movable component (15-16) of the screw-nut assembly (12, 15-16) to unite integrally in rotation the driving element (20, 24) and the component (15-16), and - a grab (5) provided with swivelling fingers (18) for holding in translation the rotationally movable component (15-16) of the screw-nut assembly (12, 15-16) and for controlling the fall of the screw-nut assembly, of the shaft and of the absorbing unit, at the time of the emergency stoppage, the motor (4) and the grab (5) being fixed on a leakproof enclosure (2) communicating with the interior of the reactor and fixed integrally to the cover (1) of the vessel enclosing the core of this reactor, the motor and the grab being arranged at least partly in this enclosure (2), characterised in that the element for driving the rotationally movable component (15-16) consists of an assembly of two jackets (20, 24) mounted telescopically one following the other in the vertical direction and assembled through the intermediacy of a spring (31) which is compressed when the two jackets (20, 24) move telescopically.
[EP0034517A2]
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8002273A FR2475273B1 (en) | 1980-02-01 | 1980-02-01 | SCREW AND NUT MECHANISM FOR CONTROLLING A NUCLEAR REACTOR |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| IE810175L true IE810175L (en) | 1981-08-01 |
| IE50729B1 IE50729B1 (en) | 1986-06-25 |
Family
ID=9238124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| IE175/81A IE50729B1 (en) | 1980-02-01 | 1981-01-30 | Screw and nut mechanism for controlling a nuclear reactor |
Country Status (11)
| Country | Link |
|---|---|
| EP (1) | EP0034517B1 (en) |
| JP (1) | JPS56120979A (en) |
| BR (1) | BR8100532A (en) |
| CA (1) | CA1160366A (en) |
| DE (1) | DE3164794D1 (en) |
| ES (1) | ES498966A0 (en) |
| FR (1) | FR2475273B1 (en) |
| GR (1) | GR73152B (en) |
| IE (1) | IE50729B1 (en) |
| PT (1) | PT72404B (en) |
| ZA (1) | ZA81573B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2632443A1 (en) * | 1988-06-01 | 1989-12-08 | Mitsubishi Heavy Ind Ltd | System for supervising the operating conditions of a driving mechanism of a control rod |
| FR3039695B1 (en) * | 2015-07-29 | 2017-09-01 | Soc Technique Pour L'energie Atomique | NUCLEAR REACTOR WITH DRIVING OF THE VIS-NUT-TYPE HEART REACTIVITY CONTROLLERS |
| CN105788668A (en) * | 2016-05-06 | 2016-07-20 | 上海核工程研究设计院 | Split nut driven control rod drive mechanism |
| CN114420327B (en) * | 2022-01-28 | 2024-11-19 | 上海核工程研究设计院股份有限公司 | A rod position measurement method for a motor-driven control rod drive mechanism |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1241783A (en) * | 1959-08-06 | 1960-09-23 | Creusot Forges Ateliers | Device for performing controlled rectilinear movements |
| NL280201A (en) * | 1961-06-27 | 1900-01-01 | ||
| GB960170A (en) * | 1961-06-29 | 1964-06-10 | Rolls Royce & Associates Ltd | Improvements in or relating to nuclear reactors |
| FR1415304A (en) * | 1963-12-02 | 1965-10-22 | Atomic Energy Authority Uk | control elements for nuclear reactors |
| FR1472269A (en) * | 1965-02-12 | 1967-03-10 | Atomic Energy Authority Uk | Charging machine of a nuclear reactor |
| FR1450728A (en) * | 1965-07-12 | 1966-06-24 | Creusot Forges Ateliers | Control rod control device |
| DE1290265B (en) * | 1966-12-12 | 1969-03-06 | Interatom | Drive arrangement for a control and shut-off rod in a gas or liquid-cooled nuclear reactor |
-
1980
- 1980-02-01 FR FR8002273A patent/FR2475273B1/en not_active Expired
-
1981
- 1981-01-26 PT PT72404A patent/PT72404B/en unknown
- 1981-01-28 ZA ZA00810573A patent/ZA81573B/en unknown
- 1981-01-30 EP EP81400142A patent/EP0034517B1/en not_active Expired
- 1981-01-30 GR GR64016A patent/GR73152B/el unknown
- 1981-01-30 IE IE175/81A patent/IE50729B1/en not_active IP Right Cessation
- 1981-01-30 BR BR8100532A patent/BR8100532A/en not_active IP Right Cessation
- 1981-01-30 DE DE8181400142T patent/DE3164794D1/en not_active Expired
- 1981-01-30 CA CA000369808A patent/CA1160366A/en not_active Expired
- 1981-01-30 ES ES498966A patent/ES498966A0/en active Granted
- 1981-02-02 JP JP1420581A patent/JPS56120979A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| EP0034517A3 (en) | 1981-09-09 |
| ZA81573B (en) | 1982-02-24 |
| GR73152B (en) | 1984-02-10 |
| ES8301048A1 (en) | 1982-11-01 |
| FR2475273A1 (en) | 1981-08-07 |
| BR8100532A (en) | 1981-08-18 |
| JPS56120979A (en) | 1981-09-22 |
| PT72404A (en) | 1981-02-01 |
| EP0034517A2 (en) | 1981-08-26 |
| CA1160366A (en) | 1984-01-10 |
| PT72404B (en) | 1982-01-05 |
| EP0034517B1 (en) | 1984-07-18 |
| DE3164794D1 (en) | 1984-08-23 |
| ES498966A0 (en) | 1982-11-01 |
| FR2475273B1 (en) | 1986-10-31 |
| IE50729B1 (en) | 1986-06-25 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| MM4A | Patent lapsed |