FR2402201A1 - Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps - Google Patents

Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps

Info

Publication number
FR2402201A1
FR2402201A1 FR7727524A FR7727524A FR2402201A1 FR 2402201 A1 FR2402201 A1 FR 2402201A1 FR 7727524 A FR7727524 A FR 7727524A FR 7727524 A FR7727524 A FR 7727524A FR 2402201 A1 FR2402201 A1 FR 2402201A1
Authority
FR
France
Prior art keywords
fuel rods
helium
isolated
mass spectrometer
nuclear fuel
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
FR7727524A
Other languages
French (fr)
Other versions
FR2402201B1 (en
Inventor
Claude Divet
Claude Morin
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.)
Compagnie pour lEtude et la Realisation de Combustibles Atomiques SAS
Original Assignee
Compagnie pour lEtude et la Realisation de Combustibles Atomiques SAS
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 Compagnie pour lEtude et la Realisation de Combustibles Atomiques SAS filed Critical Compagnie pour lEtude et la Realisation de Combustibles Atomiques SAS
Priority to FR7727524A priority Critical patent/FR2402201A1/en
Publication of FR2402201A1 publication Critical patent/FR2402201A1/en
Application granted granted Critical
Publication of FR2402201B1 publication Critical patent/FR2402201B1/fr
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
    • G01M3/04—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point
    • G01M3/20—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material
    • G01M3/202—Investigating fluid-tightness of structures by using fluid or vacuum by detecting the presence of fluid at the leakage point using special tracer materials, e.g. dye, fluorescent material, radioactive material using mass spectrometer detection systems
    • G—PHYSICS
    • G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
    • G21C—NUCLEAR REACTORS
    • G21C17/00—Monitoring; Testing ; Maintaining
    • G21C17/06—Devices or arrangements for monitoring or testing fuel or fuel elements outside the reactor core, e.g. for burn-up, for contamination
    • G21C17/07—Leak testing
    • 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

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • General Engineering & Computer Science (AREA)
  • High Energy & Nuclear Physics (AREA)
  • General Physics & Mathematics (AREA)
  • Examining Or Testing Airtightness (AREA)

Abstract

Very small defects in the sealing of nuclear fuel rods are detected by placing the rods in an enclosure in which the pressure is reduced to 10-3 torr and which communicates with the measuring cell of a mass spectrometer. The fuel rods are pressurised with helium to >=1 torr and the rate of escape of helium from the casings of the rods is measured by the spectrometer. The enclosure is isolated from all pumping appts. for the duration of the measurement. The pressure is pref. rduced to 10-4 toor before isolation from the pumping appts. The method is used for testing fuel rods, e.g. during mfr. The response of the spectrometer is accelerated and thus the measurement time is reduced. Disturbances to the measurements due to accidental overpressures are avoided. The sensitivity of measurement is increased permitting smaller leaks to be measured and hence smaller defects to be detected.
FR7727524A 1977-09-02 1977-09-02 Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps Granted FR2402201A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
FR7727524A FR2402201A1 (en) 1977-09-02 1977-09-02 Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7727524A FR2402201A1 (en) 1977-09-02 1977-09-02 Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps

Publications (2)

Publication Number Publication Date
FR2402201A1 true FR2402201A1 (en) 1979-03-30
FR2402201B1 FR2402201B1 (en) 1984-02-17

Family

ID=9195285

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7727524A Granted FR2402201A1 (en) 1977-09-02 1977-09-02 Detecting small sealing defects in nuclear fuel rods - by reducing surrounding pressure and measuring escape of helium using mass spectrometer isolated from vacuum pumps

Country Status (1)

Country Link
FR (1) FR2402201A1 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379946A2 (en) * 1989-01-25 1990-08-01 Westinghouse Electric Corporation Nuclear fuel rod helium leak inspection apparatus and method
WO1994011882A1 (en) * 1992-11-06 1994-05-26 Electricite De France - Service National Method and device for detecting leaks through the bushings of the cover of a nuclear reactor vessel
CN105206315A (en) * 2015-09-09 2015-12-30 中广核核电运营有限公司 Overhauling method for nuclear power station main pump seal chamber
CN106768684A (en) * 2016-12-03 2017-05-31 中国电子科技集团公司第四十三研究所 A kind of multilayer ceramic substrate air-tightness detection method
CN108871693A (en) * 2018-07-04 2018-11-23 中国原子能科学研究院 A kind of leak hunting method for superconducting cyclotron vacuum chamber

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0379946A2 (en) * 1989-01-25 1990-08-01 Westinghouse Electric Corporation Nuclear fuel rod helium leak inspection apparatus and method
US5009835A (en) * 1989-01-25 1991-04-23 Westinghouse Electric Corp. Nuclear fuel rod helium leak inspection apparatus and method
EP0379946A3 (en) * 1989-01-25 1991-11-21 Westinghouse Electric Corporation Nuclear fuel rod helium leak inspection apparatus and method
WO1994011882A1 (en) * 1992-11-06 1994-05-26 Electricite De France - Service National Method and device for detecting leaks through the bushings of the cover of a nuclear reactor vessel
US5535253A (en) * 1992-11-06 1996-07-09 Electricite De France - Service National Method and device for detecting leaks in penetrations of a nuclear reactor vessel head during operation
CN105206315A (en) * 2015-09-09 2015-12-30 中广核核电运营有限公司 Overhauling method for nuclear power station main pump seal chamber
CN106768684A (en) * 2016-12-03 2017-05-31 中国电子科技集团公司第四十三研究所 A kind of multilayer ceramic substrate air-tightness detection method
CN108871693A (en) * 2018-07-04 2018-11-23 中国原子能科学研究院 A kind of leak hunting method for superconducting cyclotron vacuum chamber
CN108871693B (en) * 2018-07-04 2019-08-06 中国原子能科学研究院 A kind of leak hunting method for superconducting cyclotron vacuum chamber

Also Published As

Publication number Publication date
FR2402201B1 (en) 1984-02-17

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Legal Events

Date Code Title Description
ST Notification of lapse