JPS5748631A - Detecting apparatus for leakage of sodium - Google Patents

Detecting apparatus for leakage of sodium

Info

Publication number
JPS5748631A
JPS5748631A JP55123473A JP12347380A JPS5748631A JP S5748631 A JPS5748631 A JP S5748631A JP 55123473 A JP55123473 A JP 55123473A JP 12347380 A JP12347380 A JP 12347380A JP S5748631 A JPS5748631 A JP S5748631A
Authority
JP
Japan
Prior art keywords
sodium
light
optical fiber
leakage
fiber
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
JP55123473A
Other languages
Japanese (ja)
Inventor
Tokuyuki Takeshima
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.)
Toshiba Corp
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co 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 Toshiba Corp, Tokyo Shibaura Electric Co Ltd filed Critical Toshiba Corp
Priority to JP55123473A priority Critical patent/JPS5748631A/en
Publication of JPS5748631A publication Critical patent/JPS5748631A/en
Pending 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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/042—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid
    • G01M3/045—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means
    • G01M3/047—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point by using materials which expand, contract, disintegrate, or decompose in contact with a fluid with electrical detection means with photo-electrical detection means, e.g. using optical fibres

Landscapes

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

Abstract

PURPOSE:To obtain simply constructed and small-sized sodium leakage detection apparatus, by using an optical fiber which is chemically eroded by sodium and is lowered the transmission efficiency of the light. CONSTITUTION:A piping 1 is surrounded by a cover 3 at a definite section detecting a leakage of sodium and an optical fiber 4 composed of a material easy to erode chemically is set up at the inside of the cover 3. Light from a light source 7 is transmitted to the fiber 4 for sodium leakage detection through an optical fiber 8 and an optical fiber cable 6. On occasion of not leaking sodium, the light emitted from the source 7 is nearly transmitted to a photodetector 11 because of no optical loss in the optical fiber 4. But, on occasion of leaking sodium, the fiber 4 is chemically eroded by sodium or sodium hydroxide produced by combining with moisture in the atmosphere and the light is leaked. Then, the transmission efficiency of the light is lowered and detection output becomes small. An output signal (a) of the detector 11 is compared with a set value b at a discrimination part 12 and presence or absence of the leakage is decided.
JP55123473A 1980-09-08 1980-09-08 Detecting apparatus for leakage of sodium Pending JPS5748631A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP55123473A JPS5748631A (en) 1980-09-08 1980-09-08 Detecting apparatus for leakage of sodium

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP55123473A JPS5748631A (en) 1980-09-08 1980-09-08 Detecting apparatus for leakage of sodium

Publications (1)

Publication Number Publication Date
JPS5748631A true JPS5748631A (en) 1982-03-20

Family

ID=14861490

Family Applications (1)

Application Number Title Priority Date Filing Date
JP55123473A Pending JPS5748631A (en) 1980-09-08 1980-09-08 Detecting apparatus for leakage of sodium

Country Status (1)

Country Link
JP (1) JPS5748631A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115947U (en) * 1984-12-29 1986-07-22
JP2010014583A (en) * 2008-07-04 2010-01-21 Hitachi-Ge Nuclear Energy Ltd Steam generating apparatus

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5376889A (en) * 1976-12-18 1978-07-07 Denki Kagaku Keiki Kk Sensor for oils* etc*
JPS53148488A (en) * 1977-05-30 1978-12-25 Furukawa Electric Co Ltd:The Detecting method of leaking points of fluid conveying paths and apparatus for the same
JPS54161990A (en) * 1978-06-12 1979-12-22 Ishikawajima Harima Heavy Ind Optical oil detector

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5376889A (en) * 1976-12-18 1978-07-07 Denki Kagaku Keiki Kk Sensor for oils* etc*
JPS53148488A (en) * 1977-05-30 1978-12-25 Furukawa Electric Co Ltd:The Detecting method of leaking points of fluid conveying paths and apparatus for the same
JPS54161990A (en) * 1978-06-12 1979-12-22 Ishikawajima Harima Heavy Ind Optical oil detector

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61115947U (en) * 1984-12-29 1986-07-22
JPH0228425Y2 (en) * 1984-12-29 1990-07-31
JP2010014583A (en) * 2008-07-04 2010-01-21 Hitachi-Ge Nuclear Energy Ltd Steam generating apparatus

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