CH584959A5 - Emergency shutdown valve for reactor steam line - closes if leak occurs and partially reopens to relieve pressure build-up - Google Patents

Emergency shutdown valve for reactor steam line - closes if leak occurs and partially reopens to relieve pressure build-up

Info

Publication number
CH584959A5
CH584959A5 CH421576A CH421576A CH584959A5 CH 584959 A5 CH584959 A5 CH 584959A5 CH 421576 A CH421576 A CH 421576A CH 421576 A CH421576 A CH 421576A CH 584959 A5 CH584959 A5 CH 584959A5
Authority
CH
Switzerland
Prior art keywords
valve
steam
steam line
pistons
section
Prior art date
Application number
CH421576A
Original Assignee
Kraftwerk Union Ag
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
Priority claimed from DE2519346A external-priority patent/DE2519346C2/en
Application filed by Kraftwerk Union Ag filed Critical Kraftwerk Union Ag
Publication of CH584959A5 publication Critical patent/CH584959A5/en

Links

Classifications

    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21D—NUCLEAR POWER PLANT
    • G21D3/00—Control of nuclear power plant
    • G21D3/04—Safety arrangements
    • G21D3/06—Safety arrangements responsive to faults within the plant
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Plasma & Fusion (AREA)
  • High Energy & Nuclear Physics (AREA)
  • Structure Of Emergency Protection For Nuclear Reactors (AREA)
  • Control Of Turbines (AREA)

Abstract

The Parent Patent describes a nuclear reactor with a rapid shut-off valve in the steam line (2) leading from a steam generator (1) out through the containment shell (towards the right) to a turbine. The valve cross-section is equal to the steam line cross-section. This valve is driven by pressurised fluid to the closure position, as shown in full lines, if a leak occurs in the steam line. The valve is actuated by a two-piston system, connected to the upstream side of the steam line, so that if the steam pressure rises again the valve partially opens to less than half the flow cross-section of the steam line, to permit limited escape of steam without damage. Only one of the pistons is connected rigidly to the valve plate whereas the other piston is coupled to it only over part of the stroke. In the Patent of Addition the pistons associated with the valve plate are actuated solely by a controlled release of pressure. The pistons are pref. both tubular, one inside the other. Used for a pressurised water reactor. The valve is actuated solely by steam, without other pressurised fluid. In normal operations all parts of the valve are in contact with steam, thus minimising temp. differences.
CH421576A 1975-04-30 1976-04-05 Emergency shutdown valve for reactor steam line - closes if leak occurs and partially reopens to relieve pressure build-up CH584959A5 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE2519346A DE2519346C2 (en) 1974-09-26 1975-04-30 Controllable valve

Publications (1)

Publication Number Publication Date
CH584959A5 true CH584959A5 (en) 1977-02-15

Family

ID=5945475

Family Applications (1)

Application Number Title Priority Date Filing Date
CH421576A CH584959A5 (en) 1975-04-30 1976-04-05 Emergency shutdown valve for reactor steam line - closes if leak occurs and partially reopens to relieve pressure build-up

Country Status (3)

Country Link
BR (1) BR7600864A (en)
CH (1) CH584959A5 (en)
ES (1) ES447369A1 (en)

Also Published As

Publication number Publication date
ES447369A1 (en) 1977-12-01
BR7600864A (en) 1977-08-30

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Legal Events

Date Code Title Description
PL Patent ceased