GB1513775A - Nuclear reactor installation including a control valve - Google Patents

Nuclear reactor installation including a control valve

Info

Publication number
GB1513775A
GB1513775A GB26045/75A GB2604575A GB1513775A GB 1513775 A GB1513775 A GB 1513775A GB 26045/75 A GB26045/75 A GB 26045/75A GB 2604575 A GB2604575 A GB 2604575A GB 1513775 A GB1513775 A GB 1513775A
Authority
GB
United Kingdom
Prior art keywords
valve
steam
pressure
piston
open
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
GB26045/75A
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.)
Kraftwerk Union AG
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 DE2430724A external-priority patent/DE2430724C3/en
Priority claimed from DE2446044A external-priority patent/DE2446044C3/en
Application filed by Kraftwerk Union AG filed Critical Kraftwerk Union AG
Publication of GB1513775A publication Critical patent/GB1513775A/en
Expired legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G21NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21DNUCLEAR POWER PLANT
    • G21D3/00Control of nuclear power plant
    • G21D3/04Safety arrangements
    • G21D3/06Safety arrangements responsive to faults within the plant
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/34Cutting-off parts, e.g. valve members, seats
    • F16K1/36Valve members
    • F16K1/38Valve members of conical shape
    • F16K1/385Valve members of conical shape contacting in the closed position, over a substantial axial length, a seat surface having the same inclination
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/50Preventing rotation of valve members
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/52Means for additional adjustment of the rate of flow
    • F16K1/523Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a stop
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K1/00Lift valves or globe valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces
    • F16K1/32Details
    • F16K1/52Means for additional adjustment of the rate of flow
    • F16K1/526Means for additional adjustment of the rate of flow for limiting the maximum flow rate, using a second valve
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/042Safety 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 locking or disconnecting arrangements
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K31/00Actuating devices; Operating means; Releasing devices
    • F16K31/12Actuating devices; Operating means; Releasing devices actuated by fluid
    • F16K31/122Actuating devices; Operating means; Releasing devices actuated by fluid the fluid acting on a piston
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16KVALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0008Mechanical means
    • F16K37/0016Mechanical means having a graduated scale
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E30/00Energy generation of nuclear origin

Landscapes

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

Abstract

1513775 Fluid-pressure servomotor systems KRAFTWERK UNION AG 18 June 1975 [26 June 1974 26 Sept 1974] 26045/75 Heading G3P [Also in Divisions F2 and G6] A safety valve 8, Figs. 1 and 2, in the live steam line 2 of a nuclear reactor installation, comprises a normally open valve-member 22 controlled by a mechanism sensitive to pressure to rapidly close or almost close the valve when the pressure falls below its normal operating value and to re-open the valve by at most half its fully-open throughflow cross-section if the pressure subsequently rises above a predetermined value in excess of the normal operating value. The valve 8 is located in a safety envelope 3 of the installation together with steam generator 1 and safety valve 13. Outside the envelope the line 2 is associated with a branch 16 having a further safety valve 17 and blow-off regulating valves 20. The valve, Fig. 2, is normally forced fully open by the steam pressure in line 2. However, should the steam-pressure fall, e.g. due to a fracture in the line, sensors would cause hydraulic pressure fluid to be supplied from an accumulator 50 to the space above piston 36 and thereby force the valve-member 22 to close. If, thereafter, the steam-pressure increases to a dangerous level, e.g. because the reactor is not shut-down quickly, it re-opens the valve-member 22 but only by an amount set by an adjustable stop 42. The amount is up to one-half, preferably 30%, of its fully-open flow cross-section. Additionally an adjustable stop 47 may be provided so that when the valve-member 22 is moved towards its closed position it is prevented from completely closing for a short time, e.g. 20 seconds. Alternatively, the final closing movement of the valve may be controlled by a clockwork timing mechanism. In an alternative valve, Fig. 6, the valve-member is actuated by a pair of pistons 116, 121 operating in a common cylinder, the steampressure upstream of the valve-member being communicable with opposite ends of the cylinder via two 2-3 way pressure-responsive valves 126, 128. In the event of damage to the steam system, steam is delivered through valve 128 to act upon piston 116 and close the valve-member 102 as shown. If steam-pressure thereafter rises to about 80 bars, the valve 126 switches to allow the steam to act on piston 121 which, assisted by steam-pressure acting on the valve-member, causes the latter to partially open until piston 121 abuts a stop 122. If the steam-pressure rises further to 88 bars then the valve 128 switches to exhaust the steam from above the piston 116 whereby the valve-member is further opened by an amount determined by stops 142. Complete closure of the valve-member can be effected by delivering compressed air through conduit 134. A pointer 145 and scale 146 indicate the position of the valve-member. Alternative reactor installations incorporating the valve are illustrated in Figs. 3 and 4 (not shown).
GB26045/75A 1974-06-26 1975-06-18 Nuclear reactor installation including a control valve Expired GB1513775A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE2430724A DE2430724C3 (en) 1974-06-26 1974-06-26 Controllable valve
DE2446044A DE2446044C3 (en) 1974-09-26 1974-09-26 Controllable valve in a nuclear reactor plant

Publications (1)

Publication Number Publication Date
GB1513775A true GB1513775A (en) 1978-06-07

Family

ID=25767328

Family Applications (1)

Application Number Title Priority Date Filing Date
GB26045/75A Expired GB1513775A (en) 1974-06-26 1975-06-18 Nuclear reactor installation including a control valve

Country Status (6)

Country Link
JP (2) JPS5117799A (en)
CH (1) CH580858A5 (en)
FR (1) FR2276666A1 (en)
GB (1) GB1513775A (en)
NL (1) NL7506517A (en)
SE (1) SE414978B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019374A1 (en) 2011-08-03 2013-02-07 Westinghouse Electric Company Llc Nuclear steam generator steam nozzle flow restrictor
WO2022129948A1 (en) * 2020-12-18 2022-06-23 HydroHammer Limited Electronic ram pump controller

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS54153996A (en) * 1978-05-25 1979-12-04 Toshiba Corp Sub-cooling sea water system for emergency
JP2654236B2 (en) * 1990-06-14 1997-09-17 株式会社東芝 Main steam isolation valve
CN115126552B (en) * 2022-07-26 2024-06-04 中国船舶集团有限公司第七〇四研究所 Flow valve group structure with safety valve arranged outside machine

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013019374A1 (en) 2011-08-03 2013-02-07 Westinghouse Electric Company Llc Nuclear steam generator steam nozzle flow restrictor
EP2740126A1 (en) * 2011-08-03 2014-06-11 Westinghouse Electric Company LLC Nuclear steam generator steam nozzle flow restrictor
EP2740126A4 (en) * 2011-08-03 2015-04-15 Westinghouse Electric Corp Nuclear steam generator steam nozzle flow restrictor
US9091429B2 (en) 2011-08-03 2015-07-28 Westinghouse Electric Company Llc Nuclear steam generator steam nozzle flow restrictor
WO2022129948A1 (en) * 2020-12-18 2022-06-23 HydroHammer Limited Electronic ram pump controller

Also Published As

Publication number Publication date
JPS58165699U (en) 1983-11-04
JPS5937758Y2 (en) 1984-10-19
SE7506801L (en) 1975-12-29
NL7506517A (en) 1975-12-30
FR2276666B1 (en) 1983-02-25
JPS5117799A (en) 1976-02-12
FR2276666A1 (en) 1976-01-23
CH580858A5 (en) 1976-10-15
SE414978B (en) 1980-08-25

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee