GB1462710A - Safety device for a nuclear reactor - Google Patents

Safety device for a nuclear reactor

Info

Publication number
GB1462710A
GB1462710A GB4654674A GB4654674A GB1462710A GB 1462710 A GB1462710 A GB 1462710A GB 4654674 A GB4654674 A GB 4654674A GB 4654674 A GB4654674 A GB 4654674A GB 1462710 A GB1462710 A GB 1462710A
Authority
GB
United Kingdom
Prior art keywords
damping system
coolant
absorber element
reactor
tube
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
GB4654674A
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 GB1462710A publication Critical patent/GB1462710A/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
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C9/00—Emergency protection arrangements structurally associated with the reactor, e.g. safety valves provided with pressure equalisation devices
    • G21C9/02—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency
    • G21C9/027—Means for effecting very rapid reduction of the reactivity factor under fault conditions, e.g. reactor fuse; Control elements having arrangements activated in an emergency by fast movement of a solid, e.g. pebbles
    • 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)
  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)

Abstract

1462710 Controlling nuclear reactors COMMISSARIAT A L'ENERGIE ATOMIQUE 28 Oct 1974 [8 Nov 1973] 46546/74 Heading G6C A safety device in a nuclear reactor comprises an absorber element 18 having a head 20 releasably connected electromagnetically in a vertically movable operating stem 16; before release (Fig. 2), the element 18 is positioned in a tube 19 within the blanket zone 3 of the reactor and on release, falls into a position (Fig. 3) within the fuel zone 2, under the influence of a damping system and is supported by an abutment 27. The absorber element 18 may comprise links 24 of boron carbide enriched in B 10 . Holes 28 allow escape of liquid metal coolant when the element drops and may constitute the damping system. In a modification, Figs. 7a- 7b (not shown), a sleeve with a piston is provided at the top of head 20 as an alternative damping system. Operating means for stem 16 comprises a lead-screw and is described with reference to Figs. 4, 5 (not shown). The device is automatically releasable on deformation of the reactor core. Means comprising passages for the coolant and a spring may be provided, Fig. 6 (not shown), at the top of the tube 19 in order to permit automatic dropping of the absorber element in the event of abnormal reduction in the coolant flow rate.
GB4654674A 1973-11-08 1974-10-28 Safety device for a nuclear reactor Expired GB1462710A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7339717A FR2251079B1 (en) 1973-11-08 1973-11-08

Publications (1)

Publication Number Publication Date
GB1462710A true GB1462710A (en) 1977-01-26

Family

ID=9127460

Family Applications (1)

Application Number Title Priority Date Filing Date
GB4654674A Expired GB1462710A (en) 1973-11-08 1974-10-28 Safety device for a nuclear reactor

Country Status (5)

Country Link
BE (1) BE821116A (en)
ES (1) ES431612A1 (en)
FR (1) FR2251079B1 (en)
GB (1) GB1462710A (en)
IT (1) IT1024678B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015500463A (en) * 2011-12-02 2015-01-05 コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ Reactor assembly comprising nuclear fuel and a system for activating and inserting at least one neutron absorption and / or mitigation element
CN111916228A (en) * 2020-07-31 2020-11-10 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) Drive rod group on control rod drive mechanism and offshore reactor

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2387495A1 (en) * 1977-04-15 1978-11-10 Commissariat Energie Atomique NUCLEAR REACTOR SAFETY DEVICE
FR2507809A1 (en) * 1981-06-10 1982-12-17 Commissariat Energie Atomique Safety device for control rod in nuclear reactor - where rod is pushed downwards in its sleeve if accident or earthquake occurs
FR2586500B1 (en) * 1985-08-22 1987-10-30 Commissariat Energie Atomique ABSORBENT ELEMENT FOR FAST NEUTRAL NUCLEAR REACTOR

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015500463A (en) * 2011-12-02 2015-01-05 コミッサリア ア レネルジー アトミーク エ オ ゼネルジ ザルタナテイヴ Reactor assembly comprising nuclear fuel and a system for activating and inserting at least one neutron absorption and / or mitigation element
CN111916228A (en) * 2020-07-31 2020-11-10 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) Drive rod group on control rod drive mechanism and offshore 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
IT1024678B (en) 1978-07-20
BE821116A (en) 1975-02-17
FR2251079B1 (en) 1976-12-03
ES431612A1 (en) 1977-04-16
FR2251079A1 (en) 1975-06-06

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee