Development of a portable -ray dust monitor for highly-concentrated airborne contaminants

Sagawa, Naoki; Fujisawa, Makoto; Hosomi, Kenji ; Morishita, Yuki ; Takada, Chie

Radioactivity concentrations of airborne dust are important measurements because they are used to protect workers from intakes and to assess internal exposure doses. Therefore, we developed a portable -ray dust monitor by using an ultra-thin plastic scintillator, which is designed for continuous monitoring of highly-concentrated airborne contaminants ( 10 $^{-2}$ Bq/cm $^{3}$ , equivalent to 30 times larger than the derived air concentration of $^{90}$ Sr) such as a decommissioning work in the Fukushima Daiichi Nuclear Power Plant. From the performance test results, it is evaluated that the developed portable -ray dust monitor is functional in continuous monitoring with an airborne concentration of 1 Bq/cm $^{3}$ .

Language	:	Japanese
Journal	:	Hoken Butsuri (Internet)
Volume	:	58
Number	:	3
Pages	:	p.135 - 140
Publication Year/Month	:	2023/11
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Paper URL	:	https://doi.org/10.5453/jhps.58.135
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Keywords	:	福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
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Registration No. : AA20221061
JAEA Abstracts No. : 52000198
Paper Submission No. : 27622

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