GB1325503A - Nuclear reactors and control means - Google Patents

Nuclear reactors and control means

Info

Publication number
GB1325503A
GB1325503A GB3028171A GB1325503DA GB1325503A GB 1325503 A GB1325503 A GB 1325503A GB 3028171 A GB3028171 A GB 3028171A GB 1325503D A GB1325503D A GB 1325503DA GB 1325503 A GB1325503 A GB 1325503A
Authority
GB
United Kingdom
Prior art keywords
canister
balls
channel
tie
rod
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
GB3028171A
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.)
UK Atomic Energy Authority
Original Assignee
UK Atomic Energy Authority
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 UK Atomic Energy Authority filed Critical UK Atomic Energy Authority
Publication of GB1325503A publication Critical patent/GB1325503A/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
    • G21C7/10—Construction of control elements
    • 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)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)

Abstract

1325503 Controlling reactors UNITED KINGDOM ATOMIC ENERGY AUTHORITY 6 June 1972 [28 June 1971] 30281/71 Heading G6C The control element of a nuclear reactor comprises an elongate canister 3 containing balls 7 of boron steel which are normally retained in the canister against gravity by a lower end closure member 4. The canister has a central tube 5 through which a tie-rod 6 passes to the closure member, the canister being suspended in alignment with a vertical channel 2 in the reactor core 1 by means of this tie-rod and being variably positioned in the channel 2 by means (not shown) sensitive to reactor characteristics for reactivity control. An enlarged portion at the upper end of the canister 3 forms a reservoir 8 for the balls 7 and there is a substantial clearance between the remainder of the canister and the channel. In normal nse the canister is raised and lowered by the tie-rod 6, while in an emergency the tie-rod 6 is released to allow the canister and the balls to fall. In the event of the core having become distorted such that the canister jams in the channel before full entry has been effected, then the balls displace the closure member 4 and fall freely into the channel. The reservoir 8 ensures that there are sufficient balls to effect complete shut-down.
GB3028171A 1971-06-28 1971-06-28 Nuclear reactors and control means Expired GB1325503A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3028171 1971-06-28

Publications (1)

Publication Number Publication Date
GB1325503A true GB1325503A (en) 1973-08-01

Family

ID=10305162

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3028171A Expired GB1325503A (en) 1971-06-28 1971-06-28 Nuclear reactors and control means

Country Status (1)

Country Link
GB (1) GB1325503A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394147A1 (en) * 1977-06-10 1979-01-05 Combustion Eng DEVICE FOR RETAINING, RELEASING AND REPLACING NEUTRON ABSORPTION MASSES
EP0036576A1 (en) * 1980-03-22 1981-09-30 GHT Gesellschaft für Hochtemperaturreaktor-Technik mbH Pebble bed reactor with auxiliary equipment for adding absorber material and method for its operation
ES2335338A1 (en) * 2009-06-02 2010-03-24 Domingo Bengo A Saez De Cortazar Security system for nuclear power plant (Machine-translation by Google Translate, not legally binding)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2394147A1 (en) * 1977-06-10 1979-01-05 Combustion Eng DEVICE FOR RETAINING, RELEASING AND REPLACING NEUTRON ABSORPTION MASSES
EP0036576A1 (en) * 1980-03-22 1981-09-30 GHT Gesellschaft für Hochtemperaturreaktor-Technik mbH Pebble bed reactor with auxiliary equipment for adding absorber material and method for its operation
ES2335338A1 (en) * 2009-06-02 2010-03-24 Domingo Bengo A Saez De Cortazar Security system for nuclear power plant (Machine-translation by Google Translate, not legally binding)

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees