GB1182239A - Drive and Coupling Mechanisms for Nuclear Reactor Control Elements. - Google Patents
Drive and Coupling Mechanisms for Nuclear Reactor Control Elements.Info
- Publication number
- GB1182239A GB1182239A GB47682/68A GB4768268A GB1182239A GB 1182239 A GB1182239 A GB 1182239A GB 47682/68 A GB47682/68 A GB 47682/68A GB 4768268 A GB4768268 A GB 4768268A GB 1182239 A GB1182239 A GB 1182239A
- Authority
- GB
- United Kingdom
- Prior art keywords
- rod
- tube
- nut
- sleeve
- fingers
- 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
Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/11—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with revolving coupling elements, e.g. socket coupling
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/105—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with grasping or spreading coupling elements
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C19/00—Arrangements for treating, for handling, or for facilitating the handling of, fuel or other materials which are used within the reactor, e.g. within its pressure vessel
- G21C19/02—Details of handling arrangements
- G21C19/10—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements
- G21C19/115—Lifting devices or pulling devices adapted for co-operation with fuel elements or with control elements with latching devices and ball couplings
-
- 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)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Load-Engaging Elements For Cranes (AREA)
- Monitoring And Testing Of Nuclear Reactors (AREA)
- Carriers, Traveling Bodies, And Overhead Traveling Cranes (AREA)
Abstract
1,182,239. Grippers for nuclear fuel elements. COMBUSTION ENG. Inc. 8 Oct., 1968 [10 Oct., 1967], No. 47682/68. Heading B8H. [Also in Division G6] A control element is coupled to a drive mechanism by means of a gripper comprising fingers 64 movable between their locking and unlocking positions by the action of the head 68 of a rod 66. Attached to the rod 66 by means of a pin 70 is a cylindrical member 72 at the lower end of which are camming members 74. The entire gripper operating mechanism reciprocates vertically relative to the fingers 64 and when lowered, the camming members 74 (as shown in Fig. 4) release the fingers 64 and the head 68 forces the fingers apart to release the lifting attachment 75 on the control element. The entire gripper operating mechanism is attached by means of a rotatable joint (not shown) to a rod 76 which extends vertically through a tube 60 screw-threaded at its lower portion 63 to the upper end of the fingers 64 and screwthreaded at its upper portion 61 to a threaded portion 78 on the rod 76. The tube 60 in turn extends vertically through a hollow rack 26 forming part of a rack and pinion drive. An elongated nut-like member 62 is screwthreaded on to the upper portion 61 and the tube 60 is suspended by means of this nut 62 from the head 42 of the rack 26. Since vibration or operation of the drive mechanism could cause the nut 62 to rotate relative to the tube 60, locking means are provided comprising a sleeve 80 extending upwardly from the nut 62 and surrounding the upper portion 61. A lock operator 82 is mounted around the sleeve 80 with pins 84 extending inwardly into slots 86 in the sleeve. A spring 87 between the nut 62 and the operator 82 forces the latter upwardly into a position in which a ball detent mechanism locks the sleeve 80 and thus the nut 62 to the tube 60. In order to unlock and rotate the nut 62 a tool is employed first to depress the operator 82 against the force of the spring 87 and release the detent mechanism and then to rotate the operator 82. The pins 84 cause the nut 62 to rotate, thereby lowering the tube 60 within the rack 26. The control element is uncoupled by lowering the rack 26 as far as possible in which position the control element is located just above the reactor core base and then a first tool is inserted to operate the nut locking mechanism as described above. The tube 60 is then lowered within the rack 26 and the control element thus lowered on to the core base. The tool is then removed and a second tool inserted to operate the grippers. This tool fits over pin 97 at the upper end of the rod 76 and rotates the rod so as to screw it down within the tube 60, causing the gripper operating mechanism to be lowered with respect to the fingers 64 whereby the fingers are opened and the control element released. The rack 26 is then driven to its upper limit of travel. After this procedure has been followed for each of the control element drive assemblies, the head may be removed from the reactor vessel together with the drive assemblies. In an alternative arrangement for raising and lowering the rod 76 within the tube 60 (Figs. 8 and 9, not shown), the tube has a bayonet slot with the hooked end uppermost into which a pin extends. The pin is received in the shorter leg of the bayonet slot when the rod is held within the tube. The pin is attached to the rod by means comprising a sleeve to which the pin is attached extending over the end of the rod, the sleeve being provided with a U-slot with upwardly extending arms, a second pin attached to the rod and extending outwardly so as to be received in one of the legs of the U-slot, a spring biasing the sleeve down on to the end of the rod, and means for lifting the sleeve against the force of the spring and for rotating the sleeve so that the pins take positions in the other legs of the bayonet slot and the U-slot respectively.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US67420567A | 1967-10-10 | 1967-10-10 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1182239A true GB1182239A (en) | 1970-02-25 |
Family
ID=24705727
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB47682/68A Expired GB1182239A (en) | 1967-10-10 | 1968-10-08 | Drive and Coupling Mechanisms for Nuclear Reactor Control Elements. |
Country Status (4)
Country | Link |
---|---|
CH (1) | CH483084A (en) |
DE (1) | DE1800789A1 (en) |
FR (1) | FR1585774A (en) |
GB (1) | GB1182239A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2496193A1 (en) * | 1980-12-16 | 1982-06-18 | Westinghouse Electric Corp | MECHANISM FOR LATCHING AND TRANSLATION OF BARS |
EP2580762A4 (en) * | 2010-06-08 | 2017-02-08 | Westinghouse Electric Company LLC | Control rod drive shaft unlatching tool |
CN109390063A (en) * | 2018-11-06 | 2019-02-26 | 中核核电运行管理有限公司 | A kind of pressurized-water reactor nuclear power plant reactor core guide post Automatic hook block |
US11289222B2 (en) | 2018-03-16 | 2022-03-29 | Framatome Inc. | Method and device for unlatching control rod drive shafts in pressurized water reactors |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2708786A1 (en) * | 1977-03-01 | 1978-09-07 | Haeussler Ernst | DEVICE FOR ATTACHING A PRECAST CONCRETE PART TO A HOIST |
US4204910A (en) * | 1977-08-25 | 1980-05-27 | Batjukov Vladimir I | Gripping means for refuelling a nuclear reactor |
FR2420826A1 (en) * | 1978-03-22 | 1979-10-19 | Commissariat Energie Atomique | REMOTELY MOUNTABLE AND REMOVABLE FUEL ASSEMBLY FOR NUCLEAR REACTOR AND CORRESPONDING TOOLS |
FR2465911A1 (en) * | 1979-09-19 | 1981-03-27 | Framatome Sa | DEVICE FOR COUPLING AND REMOTELY DISCHARGING TWO LARGE-LONG ELEMENTS COAXALLY AND END TO END |
DE3342471A1 (en) * | 1983-11-24 | 1985-06-05 | Wiederaufarbeitungsanlage Karlsruhe Betriebsgesellschaft mbH, 7514 Eggenstein-Leopoldshafen | GRAVITY-ACTIVATED GRIPPER FOR DETECTING CHILLERS WITH RADIOACTIVE CONTENT |
DE4013228C1 (en) * | 1990-04-26 | 1991-06-27 | Man Roland Druckmaschinen Ag, 6050 Offenbach, De | |
CN114572678B (en) * | 2022-03-16 | 2023-03-21 | 中国原子能科学研究院 | Grabbing mechanism of nuclear power assembly and grabbing device comprising grabbing mechanism |
-
1968
- 1968-10-03 DE DE19681800789 patent/DE1800789A1/en active Pending
- 1968-10-04 CH CH1485768A patent/CH483084A/en not_active IP Right Cessation
- 1968-10-08 GB GB47682/68A patent/GB1182239A/en not_active Expired
- 1968-10-09 FR FR1585774D patent/FR1585774A/fr not_active Expired
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR2496193A1 (en) * | 1980-12-16 | 1982-06-18 | Westinghouse Electric Corp | MECHANISM FOR LATCHING AND TRANSLATION OF BARS |
EP0054788A2 (en) * | 1980-12-16 | 1982-06-30 | Westinghouse Electric Corporation | Rod drive and latching mechanism |
EP0054788A3 (en) * | 1980-12-16 | 1982-09-22 | Westinghouse Electric Corporation | Rod drive and latching mechanism |
EP2580762A4 (en) * | 2010-06-08 | 2017-02-08 | Westinghouse Electric Company LLC | Control rod drive shaft unlatching tool |
US11289222B2 (en) | 2018-03-16 | 2022-03-29 | Framatome Inc. | Method and device for unlatching control rod drive shafts in pressurized water reactors |
CN109390063A (en) * | 2018-11-06 | 2019-02-26 | 中核核电运行管理有限公司 | A kind of pressurized-water reactor nuclear power plant reactor core guide post Automatic hook block |
CN109390063B (en) * | 2018-11-06 | 2024-03-19 | 中核核电运行管理有限公司 | Automatic lifting appliance for reactor core guide column of pressurized water reactor nuclear power station |
Also Published As
Publication number | Publication date |
---|---|
DE1800789A1 (en) | 1969-10-16 |
CH483084A (en) | 1969-12-15 |
FR1585774A (en) | 1970-01-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |