JPS5635054A - Detecting method of removed part - Google Patents

Detecting method of removed part

Info

Publication number
JPS5635054A
JPS5635054A JP11027679A JP11027679A JPS5635054A JP S5635054 A JPS5635054 A JP S5635054A JP 11027679 A JP11027679 A JP 11027679A JP 11027679 A JP11027679 A JP 11027679A JP S5635054 A JPS5635054 A JP S5635054A
Authority
JP
Japan
Prior art keywords
shock sound
detect
level
detection
voltmeter
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.)
Pending
Application number
JP11027679A
Other languages
Japanese (ja)
Inventor
Hidekazu Nishida
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.)
Mitsubishi Power Ltd
Original Assignee
Babcock Hitachi KK
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 Babcock Hitachi KK filed Critical Babcock Hitachi KK
Priority to JP11027679A priority Critical patent/JPS5635054A/en
Publication of JPS5635054A publication Critical patent/JPS5635054A/en
Pending legal-status Critical Current

Links

Classifications

    • 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

  • Monitoring And Testing Of Nuclear Reactors (AREA)
  • Investigating Or Analyzing Materials By The Use Of Ultrasonic Waves (AREA)

Abstract

PURPOSE: To detect the shock sound of fallen components without error, by keeping constant the shock sound detection level independently of the change in the background level.
CONSTITUTION: The acceleration meter 4 is located to the pressure vessel of atomic reactor, vapor generator, and pump to detect the shock sound generated from the components fallen through the collision of wall surface of each unit. The background noise 8 is rejected from the detected output to detect the shock sound 9 and this detection signal 11 is fed to the alarm generator 7 to produce the alarm 12. In this case, the voltmeter 16 and the microcomputer 17 are inserted and located between the acceleration meter 4 and the shock sound detector 6, the background noise level is read in with the voltmeter, it is detected at the computer so that the threshold value keeps a given difference with the noise level and the amplification factor of the shock sound detector 6 can automatically be adjusted. Thus, the accuracy of detection can be increased.
COPYRIGHT: (C)1981,JPO&Japio
JP11027679A 1979-08-31 1979-08-31 Detecting method of removed part Pending JPS5635054A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP11027679A JPS5635054A (en) 1979-08-31 1979-08-31 Detecting method of removed part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP11027679A JPS5635054A (en) 1979-08-31 1979-08-31 Detecting method of removed part

Publications (1)

Publication Number Publication Date
JPS5635054A true JPS5635054A (en) 1981-04-07

Family

ID=14531576

Family Applications (1)

Application Number Title Priority Date Filing Date
JP11027679A Pending JPS5635054A (en) 1979-08-31 1979-08-31 Detecting method of removed part

Country Status (1)

Country Link
JP (1) JPS5635054A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4666655A (en) * 1983-08-19 1987-05-19 Electricite De France Process and installation for detecting stray bodies in a nuclear reactor

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4666655A (en) * 1983-08-19 1987-05-19 Electricite De France Process and installation for detecting stray bodies in a nuclear reactor

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