JPS57122335A - Water leakage sensing device - Google Patents

Water leakage sensing device

Info

Publication number
JPS57122335A
JPS57122335A JP56007833A JP783381A JPS57122335A JP S57122335 A JPS57122335 A JP S57122335A JP 56007833 A JP56007833 A JP 56007833A JP 783381 A JP783381 A JP 783381A JP S57122335 A JPS57122335 A JP S57122335A
Authority
JP
Japan
Prior art keywords
memory
output
input
water leakage
concentration
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.)
Granted
Application number
JP56007833A
Other languages
Japanese (ja)
Other versions
JPH0353570B2 (en
Inventor
Tatsuo Hamada
Noboru Nakao
Yoshinori Mae
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.)
Hitachi Ltd
Original Assignee
Hitachi 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 Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP56007833A priority Critical patent/JPS57122335A/en
Publication of JPS57122335A publication Critical patent/JPS57122335A/en
Publication of JPH0353570B2 publication Critical patent/JPH0353570B2/ja
Granted legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M3/00—Investigating fluid-tightness of structures
    • G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
    • G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)
  • Monitoring And Testing Of Nuclear Reactors (AREA)

Abstract

PURPOSE:To sense water leakage with high reliability and at its early stage by measuring the variation in the concentration of hydrogen in a fast neutron reactor. CONSTITUTION:An hydrogen concentration output 14 that is input to a signal treatment device 15 is given to a memory M4. An output of the memory M4 is given to a subtractor 20a and a memory M3. An output of the memory M3 is input to a subtractor 20c and a memory M1. An output of M1 is input to a subtractor 20d and a memory M0. An output of the memory M0 is input to each of the subtractors 20a-20d. After each subtraction output has been stored in the memories M11-M14 by means of a specified timing pulse P5, it is given to an alarm setting circuit 23 a and a trip setting circuit 24. Then hydrogen concentration is measured at the interval of a specified time, and a plurality of variations in concentration are mutually compared to sense water leakage by the variation in hydrogen concentration.
JP56007833A 1981-01-23 1981-01-23 Water leakage sensing device Granted JPS57122335A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP56007833A JPS57122335A (en) 1981-01-23 1981-01-23 Water leakage sensing device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP56007833A JPS57122335A (en) 1981-01-23 1981-01-23 Water leakage sensing device

Publications (2)

Publication Number Publication Date
JPS57122335A true JPS57122335A (en) 1982-07-30
JPH0353570B2 JPH0353570B2 (en) 1991-08-15

Family

ID=11676598

Family Applications (1)

Application Number Title Priority Date Filing Date
JP56007833A Granted JPS57122335A (en) 1981-01-23 1981-01-23 Water leakage sensing device

Country Status (1)

Country Link
JP (1) JPS57122335A (en)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159786A (en) * 1974-06-14 1975-12-24
JPS5137683A (en) * 1974-09-27 1976-03-30 Hitachi Ltd JOKIRIIKUKENSHUTSUHOSHIKI
JPS5343637A (en) * 1976-09-30 1978-04-19 Mecanique Soc Ind De Method of applying reflection coating onto metal surface

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS50159786A (en) * 1974-06-14 1975-12-24
JPS5137683A (en) * 1974-09-27 1976-03-30 Hitachi Ltd JOKIRIIKUKENSHUTSUHOSHIKI
JPS5343637A (en) * 1976-09-30 1978-04-19 Mecanique Soc Ind De Method of applying reflection coating onto metal surface

Also Published As

Publication number Publication date
JPH0353570B2 (en) 1991-08-15

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