JPS5443788A - Highly sensitive continuous monitor of radioactivity in waste liquid - Google Patents

Highly sensitive continuous monitor of radioactivity in waste liquid

Info

Publication number
JPS5443788A
JPS5443788A JP10949377A JP10949377A JPS5443788A JP S5443788 A JPS5443788 A JP S5443788A JP 10949377 A JP10949377 A JP 10949377A JP 10949377 A JP10949377 A JP 10949377A JP S5443788 A JPS5443788 A JP S5443788A
Authority
JP
Japan
Prior art keywords
rinsing
reservoir
waste liquid
brush
detector
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
JP10949377A
Other languages
Japanese (ja)
Inventor
Yoshiyuki Yuasa
Shinji Kashibe
Itaru Sakajiri
Kouichirou Hara
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
Nippon Atomic Industry Group Co Ltd
Original Assignee
Toshiba Corp
Tokyo Shibaura Electric Co Ltd
Nippon Atomic Industry Group 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, Nippon Atomic Industry Group Co Ltd filed Critical Toshiba Corp
Priority to JP10949377A priority Critical patent/JPS5443788A/en
Publication of JPS5443788A publication Critical patent/JPS5443788A/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)
  • Measurement Of Radiation (AREA)

Abstract

PURPOSE: To make it possible to maintain the sensitivity of a detector at a lower limit of 10-7μCi/Ml for a long time by rinsing the inner wall of a cylindrical reservoir for the detector in case the radioactivity in the waste liquid from an atomic facilities is monitored with the use of a NaI detector.
CONSTITUTION: A portion of the waste liquid flowing in a pipe 1 in the direction of arrow is guided by a bypass pipe 2 into a cylindrical sample reservoir 3 in a lead shielding member 6. By means of a NaI detector 5 covering most of the surface of the reservoir 3, the waste liquid in the reservoir 3 is monitored and then returned to the pipe 1 by the action of a pump 4. A rinsing mechanism 7 is periodically driven by an automatic control mechanism 14 so that the redioactive nuclides contaminating the inner wall of the reservoir 3 may be removed by the vertically sliding brush 8. This brush 8 is made to pass through a moving guide 10 by a wire 9 and is returned to a brush rinsing portion 13, which is composed of a chemically rinsing portion 11 and a water rinsing portion 12, so that the contaminants may be removed from the brush 8. During the rinsing operation, the sample liquid is stopped from flowing into, and the rinsing water is supplied from a tank 15.
COPYRIGHT: (C)1979,JPO&Japio
JP10949377A 1977-09-13 1977-09-13 Highly sensitive continuous monitor of radioactivity in waste liquid Pending JPS5443788A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP10949377A JPS5443788A (en) 1977-09-13 1977-09-13 Highly sensitive continuous monitor of radioactivity in waste liquid

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP10949377A JPS5443788A (en) 1977-09-13 1977-09-13 Highly sensitive continuous monitor of radioactivity in waste liquid

Publications (1)

Publication Number Publication Date
JPS5443788A true JPS5443788A (en) 1979-04-06

Family

ID=14511636

Family Applications (1)

Application Number Title Priority Date Filing Date
JP10949377A Pending JPS5443788A (en) 1977-09-13 1977-09-13 Highly sensitive continuous monitor of radioactivity in waste liquid

Country Status (1)

Country Link
JP (1) JPS5443788A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532103A (en) * 1980-12-01 1985-07-30 Hitachi, Ltd. Apparatus for measuring concentration of radioactivity

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4532103A (en) * 1980-12-01 1985-07-30 Hitachi, Ltd. Apparatus for measuring concentration of radioactivity

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