GB1175388A - Booster Rod or Safety Rod Installation - Google Patents

Booster Rod or Safety Rod Installation

Info

Publication number
GB1175388A
GB1175388A GB56152/67A GB5615267A GB1175388A GB 1175388 A GB1175388 A GB 1175388A GB 56152/67 A GB56152/67 A GB 56152/67A GB 5615267 A GB5615267 A GB 5615267A GB 1175388 A GB1175388 A GB 1175388A
Authority
GB
United Kingdom
Prior art keywords
rod
screw
booster
screw means
energy
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
GB56152/67A
Inventor
Robert Charles
Bernard Bouchet
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.)
European Atomic Energy Community Euratom
Original Assignee
European Atomic Energy Community Euratom
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 European Atomic Energy Community Euratom filed Critical European Atomic Energy Community Euratom
Publication of GB1175388A publication Critical patent/GB1175388A/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
    • G21C7/20—Disposition of shock-absorbing devices ; Braking arrangements
    • 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)
  • Vibration Dampers (AREA)

Abstract

1,175,388. Controlling reactors. EUROPEAN ATOMIC ENERGY COMMUNITY. 11 Dec., 1967 [16 Dec., 1966], No. 56152/67. Heading G6C. Apparatus for introducing and removing a booster rod or a safety rod into and from a nuclear reactor comprises screw means for introducing and removing the rod slowly, means for disconnecting the screw means and the rod to permit movement of the rod independently of the screw means, and an energy accumulator in which energy derived from movement of the rod in one direction by the screw means is stored and on disconnection of the screw means drives the rod rapidly in the other direction. More specifically, the apparatus comprises a first mechanism for introducing and removing the rod 18 slowly including a hollow drive screw 1 which encircles the rod 18 (a booster rod in the embodiment described) and is normally secured to it by a disconnectible coupling (Fig. 4, not shown). In the event of an alarm signal disconnecting the coupling, the rod 18 can slide axially on longitudinal anti-friction bearings, such as bearings 22, within the screw 1. The screw 1 is so mounted, by way of longitudinal anti-friction bearings and rollers (not shown) in a sleeve which extends through a biological shield and a heat shield as to be rotatable therewith and be movable axially relative thereto. The axial movement is produced by a helical anti-friction bearing 6 rotated by a reducing drive system 16 via a coupling 15. The apparatus also comprises a second mechanism for fast emergency removal of the booster rod 18 comprising two axially movable cylinders 31 which are secured to the rod 18 by arms 28 and which each encircle a stationary hollow piston 39 connected to an oleopneumatic accumulator 40 which stores energy during the introduction of the rod 18 produced by the first mechanism. The accumulators 40 provide rapid removal of the rod in an emergency. The apparatus may also be used with a safety rod, in which event the direction of the accumulators is reversed to provide rapid introduction of the rod in an emergency. A damping mechanism is provided in the form of two elastomeric hydrostatic compression dampers (not shown) to absorb the remaining energy of the moving system at the end of its fast travel. The rod 18, which has an inactive extension, may be provided with a hairpin cooling circuit in the active part.
GB56152/67A 1966-12-16 1967-12-11 Booster Rod or Safety Rod Installation Expired GB1175388A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
BE691383 1966-12-16

Publications (1)

Publication Number Publication Date
GB1175388A true GB1175388A (en) 1969-12-23

Family

ID=3849895

Family Applications (1)

Application Number Title Priority Date Filing Date
GB56152/67A Expired GB1175388A (en) 1966-12-16 1967-12-11 Booster Rod or Safety Rod Installation

Country Status (2)

Country Link
BE (1) BE691383A (en)
GB (1) GB1175388A (en)

Also Published As

Publication number Publication date
BE691383A (en) 1967-06-16

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Legal Events

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