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Gamma-ray spectroscopy with a CeBr$$_3$$ scintillator under intense $$gamma$$-ray fields for nuclear decommissioning

Kaburagi, Masaaki   ; Shimazoe, Kenji*; Kato, Masahiro*; Kurosawa, Tadahiro*; Kamada, Kei*; Kim, K. J.*; Yoshino, Masao*; Shoji, Yasuhiro*; Yoshikawa, Akira*; Takahashi, Hiroyuki*; Torii, Tatsuo  

An increasing number of nuclear facilities have been decommissioned worldwide following the 2011 accident of the TEPCO' Fukushima Daiichi Nuclear Power Station. During the decommissioning, radioactive materials have to be retrieved under proper management. In this study, a small cubic CeBr$$_3$$ spectrometer with dimensions of 5 mm $$times$$ 5 mm $$times$$ 5 mm was manufactured to perform $$gamma$$-ray spectroscopy under intense $$gamma$$-ray fields. Furthermore, thanks to a fast digital process unit and a customized photomultiplier, the device could perform $$gamma$$-ray spectroscopy at dose rates of over 1 Sv/h. The energy resolution (FWHM) at 662 keV ranged from 4.4% at 22 mSv/h to 5.2% at 1407 mSv/h for a $$^{137}$$Cs radiation field. Correspondingly, at 1333 keV, it ranged from 3.1% at 26 mSv/h to 4.2% at 2221 mSv/h for a $$^{60}$$Co radiation field, which suggested to realize $$gamma$$-ray assessment of $$^{134}$$Cs, $$^{137}$$Cs, $$^{60}$$Co, and $$^{154}$$Eu at dose rates of over 1 Sv/h.

Language

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English

Journal

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Nuclear Instruments and Methods in Physics Research A

Volume

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988

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Pages

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p.164900_1 - 164900_8

Publication Year/Month

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2021/02

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Patent information

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Paper URL

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https://doi.org/10.1016/j.nima.2020.164900

DOI for research data

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Link to research data related to this paper/report.

Keywords

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$$gamma$$-ray Spectroscopy; Cerium Bromide Scintillator; Intense $$gamma$$-ray Field; Nuclear Decommissioning; Fukushima Daiichi Nuclear Power Station Accident; 福島第一原子力発電所事故

Research Facility

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Press Release

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JAEA R&D Navigator

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Development of Radiation Detector for Non-Destructive Assay of Nuclear Fuel Debris; $$gamma$$-ray Spectrometry System Specific to High Dose-Rate Measurements Using CeBr$$_{3}$$ [/]

Cooperating Institute

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東京大学; 産業技術総合研究所

Accesses

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- Accesses

InCites™

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Percentile:80.13

Category:Instruments & Instrumentation

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