ES348209A1 - Axial-mechanism control rod actuator - Google Patents

Axial-mechanism control rod actuator

Info

Publication number
ES348209A1
ES348209A1 ES348209A ES348209A ES348209A1 ES 348209 A1 ES348209 A1 ES 348209A1 ES 348209 A ES348209 A ES 348209A ES 348209 A ES348209 A ES 348209A ES 348209 A1 ES348209 A1 ES 348209A1
Authority
ES
Spain
Prior art keywords
rod
tube
electromagnet
sliding
sliding assembly
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
Application number
ES348209A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Commissariat a lEnergie Atomique et aux Energies Alternatives CEA
Original Assignee
Commissariat a lEnergie Atomique CEA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Commissariat a lEnergie Atomique CEA filed Critical Commissariat a lEnergie Atomique CEA
Publication of ES348209A1 publication Critical patent/ES348209A1/en
Expired legal-status Critical Current

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
    • G21C7/12—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)

Abstract

In a control rod actuator for a nuclear reactor comprising a leak-tight containment vessel which is sealed by a top plug, a rod 1 is disposed inside a stationary liner tube 2 within the seal plug 3 of the reactor and coupled at its upper end to a servomechanism 4 by means of which it may be raised and lowered within the tube 2. The lower end of the rod 1 is fitted with an electromagnet 5 for attaching an assembly 6 which is capable of sliding within a guide tube 7 and a rod 8 which is capable of sliding within the assembly 6. A grappler 9 which engages a control rod 10 is mounted at the bottom of the rod 8. When the control rod 10 is in its lowermost position (as shown in Fig. 1b) the electromagnet 5 is located at the level of the underface of the seal plug 3. The sliding assembly 6 comprises a tube slidable within the liner tube 2 and a spring 11 which is applied against a stopcollar 13 of the rod 8. The guide tube 7 is fixed to a horizontal arm 15 secured to a tube 16 which is located within the seal plug 3 and can be rotated by means of a servomechanism 17. A locking pin 19 also actuated by the servomechanism 17 through the intermediary of a rod 20 within the tube 16 serves to lock the sliding assembly 6 to the guide tube 7 in the bottom position when the electromagnet 5 is not energized. A bellows seal 21 concentric with the rod 1 is fixed at one end to the rod on an annular abutment flange 22 and at the other end to the liner tube 2 on an annular abutment flange 23. A spring 24 concentric with the rod 1 and applied against the flange 22 imparts to the sliding assembly 6 through the intermediary of a movable portion 25, on de-energization of the electromagnet 5, the impulse which is necessary for the rapid dropping of the control rod 10. Opening of the grappler 9 is obtained in the bottom position by de-energizing the electromagnet 5 after having locked the sliding assembly 6 to the tube 7. The rod 8 is then thrust downwards under the action of the spring 11 and the grappler arms separate since they are no longer held by the wall of the tube 6. In order to free the space necessary for the transfer of fuel elements when the sliding assembly 6 has been locked to the tube 7 and the electromagnet 5 de-energized, the arm 15 is rotated through 180 degrees.
ES348209A 1966-12-14 1967-12-13 Axial-mechanism control rod actuator Expired ES348209A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR87491A FR1519605A (en) 1966-12-14 1966-12-14 Axial mechanism control rod control device

Publications (1)

Publication Number Publication Date
ES348209A1 true ES348209A1 (en) 1971-02-16

Family

ID=8622451

Family Applications (1)

Application Number Title Priority Date Filing Date
ES348209A Expired ES348209A1 (en) 1966-12-14 1967-12-13 Axial-mechanism control rod actuator

Country Status (8)

Country Link
BE (1) BE706868A (en)
CH (1) CH483083A (en)
ES (1) ES348209A1 (en)
FR (1) FR1519605A (en)
GB (1) GB1133300A (en)
LU (1) LU54997A1 (en)
NL (1) NL155973B (en)
SE (1) SE325343B (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108269630B (en) * 2016-12-30 2024-03-29 中核建中核燃料元件有限公司 Fuel assembly control rod pumping and inserting force detection device
CN109378092B (en) * 2018-11-12 2025-01-10 中国原子能科学研究院 An electromagnet device for a control rod drive mechanism of a pool-type low-temperature reactor
CN109360668B (en) * 2018-11-12 2025-01-24 中国原子能科学研究院 A pneumatic locking device for a control rod drive mechanism of a pool-type cryogenic reactor
CN111916228B (en) * 2020-07-31 2023-06-06 武汉第二船舶设计研究所(中国船舶重工集团公司第七一九研究所) Driving rod group on control rod driving mechanism and offshore reactor

Also Published As

Publication number Publication date
BE706868A (en) 1968-04-01
CH483083A (en) 1969-12-15
NL6716224A (en) 1968-06-17
DE1589666B2 (en) 1972-09-14
FR1519605A (en) 1968-04-05
NL155973B (en) 1978-02-15
SE325343B (en) 1970-06-29
DE1589666A1 (en) 1970-04-30
GB1133300A (en) 1968-11-13
LU54997A1 (en) 1968-02-20

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