放射性物質測定装置 - JFE Engineering Corporation

Title:

放射性物質測定装置

Document Type and Number:

Japanese Patent JP7417824

Kind Code:

B2

Abstract:

To provide a radioactive material measuring apparatus that can measure a strontium concentration at a specific part on the surface of a measurement target.SOLUTION: A radioactive material measuring apparatus 1 of the present invention comprises: a housing 3 having formed therein a radioactive ray introduction window 23 for introducing a radioactive ray radiated from a measurement target; a silica aerogel 5 arranged in the housing 3, being adjusted so as to have a refractive index of 1.017 or greater and of smaller than 1.042; a reflection mirror 7 for reflecting Cherenkov light that is emitted when the radioactive ray is incident to the silica aerogel 5 arranged in the housing 3; a Cherenkov light measurement unit 9 for measuring the Cherenkov light reflected by the reflection mirror 7; first trigger scintillation fibers 15 that are arranged at the opposite side of the radioactive ray introduction window 23 having the reflection mirror 7 in between, and that are configured so that only the radioactive ray introduced in the direction perpendicular to the light direction from the radioactive ray introduction window 23 emits light; and a first trigger measurement unit 17 for measuring the light emission from the first trigger scintillation fibers 15.SELECTED DRAWING: Figure 1

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Inventors:

Mitsuhiro Tada
Shusaku Noda
Hiroyuki Ida
Yasuhiro Miyakoshi
Hideyuki Kawai
Makoto Tabata

Application Number:

JP2020112292A

Publication Date:

January 19, 2024

Filing Date:

June 30, 2020

Export Citation:

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Assignee:

JFE Engineering Corporation
National University Corporation Chiba University

International Classes:

G01T1/22; G01T1/00; G01T1/20

Domestic Patent References:

JP2015021913A
JP2016080557A
JP3048791A

Other References:

S. Iijima et al.,“Development of Realtime 90Sr Counter”,2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC),2013年,p.1-3
飯島周多郎,リアルタイム90Srカウンターの開発,日本物理学会講演概要集 2013年秋季大会,日本,日本物理学会,2014年09月26日,第140頁,26aBC-1

Attorney, Agent or Firm:

Toshihiko Ishikawa

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