GB890661A - Protective device for nuclear reactors - Google Patents

Protective device for nuclear reactors

Info

Publication number
GB890661A
GB890661A GB23015/59A GB2301559A GB890661A GB 890661 A GB890661 A GB 890661A GB 23015/59 A GB23015/59 A GB 23015/59A GB 2301559 A GB2301559 A GB 2301559A GB 890661 A GB890661 A GB 890661A
Authority
GB
United Kingdom
Prior art keywords
reactor
shunt
curie point
poles
weight
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
GB23015/59A
Inventor
Charles Theodore Greeson
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.)
A Reyrolle and Co Ltd
Original Assignee
A Reyrolle and Co Ltd
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 A Reyrolle and Co Ltd filed Critical A Reyrolle and Co Ltd
Priority to GB23015/59A priority Critical patent/GB890661A/en
Publication of GB890661A publication Critical patent/GB890661A/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)

Abstract

890,661. Nuclear reactors. REYROLLE & CO. Ltd., A. Sept. 30, 1960 [July 3, 1959]. No. 23015/59. Class 39(4) A temperature-responsive protective device for a nuclear reactor comprises a permanent magnet whose poles are shunted by a magnetic shunt made of ferromagnetic material whose Curie point coincides with the temperature at which the device is required to operate, and automatic means responsive to the change in magnetic flux in the shunt when heated above its Curie point for causing the shut-down or partial shut-down of the reactor to bring about a temperature reduction. In one arrangement, Fig. 2 (not shown), the shunt is held against the poles by magnetic attraction and has -a weight suspended from it. The reactor coolant passes over the shunt so that when the temperature of the coolant rises above the Curie point of the shunt the magnetic attraction is reduced and the weight is allowed to fall and trip a latch which releases neutron absorbent balls into the reactor. In Fig. 3 the poles 22 of the permanent magnet are normally shunted by a bridge comprising thin vertical plates 32, of nickel-iron or other magnetic material having a suitable Curie point, clamp at either end between mild steel or iron plates and spacers forming extensions 33 of the poles. A hinged armature 34 is normally held in the position shown by a spring 35, and by means of a latch 34a retains a hook 36 encircled by a ring 38 from which a weight is suspended. When the plates 32 are heated by the reactor coolant above their Curie point the magnetic flux of the permanent magnet is diverted through armature 34 which moves upward, releases the hook 36, and thus allows the suspended weight to fall and trip a latch which releases neutron absorbent balls into the reactor.
GB23015/59A 1959-07-03 1959-07-03 Protective device for nuclear reactors Expired GB890661A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB23015/59A GB890661A (en) 1959-07-03 1959-07-03 Protective device for nuclear reactors

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23015/59A GB890661A (en) 1959-07-03 1959-07-03 Protective device for nuclear reactors

Publications (1)

Publication Number Publication Date
GB890661A true GB890661A (en) 1962-03-07

Family

ID=10188712

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23015/59A Expired GB890661A (en) 1959-07-03 1959-07-03 Protective device for nuclear reactors

Country Status (1)

Country Link
GB (1) GB890661A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976540A (en) * 1975-04-03 1976-08-24 The United States Of America As Represented By The United States Energy Research And Development Administration Magnetic latch trigger for inherent shutdown assembly
US4139414A (en) * 1977-06-10 1979-02-13 Combustion Engineering, Inc. Scram device having a multiplicity of neutron absorbing masses
EP0024783A2 (en) * 1979-08-20 1981-03-11 Westinghouse Electric Corporation Nuclear reactor shutdown system

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976540A (en) * 1975-04-03 1976-08-24 The United States Of America As Represented By The United States Energy Research And Development Administration Magnetic latch trigger for inherent shutdown assembly
US4139414A (en) * 1977-06-10 1979-02-13 Combustion Engineering, Inc. Scram device having a multiplicity of neutron absorbing masses
EP0024783A2 (en) * 1979-08-20 1981-03-11 Westinghouse Electric Corporation Nuclear reactor shutdown system
EP0024783A3 (en) * 1979-08-20 1981-03-18 Westinghouse Electric Corporation Nuclear reactor shutdown system
US4304632A (en) * 1979-08-20 1981-12-08 Westinghouse Electric Corp. Nuclear reactor shutdown system

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