Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection

Abstract The internal exposure of workers who inhale plutonium dioxide particles in nuclear facilities is a crucial matter for human protection from radiation. To determine the activity median aerodynamic diameter values at the working sites of nuclear facilities in real time, we developed a high-re...

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Autores principales:	Yuki Morishita, Shunsuke Kurosawa, Akihiro Yamaji, Masateru Hayashi, Makoto Sasano, Taisuke Makita, Tetsushi Azuma
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/91f22855eee44f0d9d59a6ea33d4248e
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spelling	oai:doaj.org-article:91f22855eee44f0d9d59a6ea33d4248e2021-12-02T11:39:44ZPlutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection10.1038/s41598-021-84515-z2045-2322https://doaj.org/article/91f22855eee44f0d9d59a6ea33d4248e2021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84515-zhttps://doaj.org/toc/2045-2322Abstract The internal exposure of workers who inhale plutonium dioxide particles in nuclear facilities is a crucial matter for human protection from radiation. To determine the activity median aerodynamic diameter values at the working sites of nuclear facilities in real time, we developed a high-resolution alpha imager using a ZnS(Ag) scintillator sheet, an optical microscope, and an electron-multiplying charge-coupled device camera. Then, we designed and applied a setup to measure a plutonium dioxide particle and identify the locations of the individual alpha particles in real time. Employing a Gaussian fitting, we evaluated the average spatial resolution of the multiple alpha particles was evaluated to be 16.2 ± 2.2 μmFWHM with a zoom range of 5 ×. Also, the spatial resolution for the plutonium dioxide particle was 302.7 ± 4.6 µmFWHM due to the distance between the plutonium dioxide particle and the ZnS(Ag) scintillator. The influence of beta particles was negligible, and alpha particles were discernible in the alpha–beta particle contamination. The equivalent volume diameter of the plutonium dioxide particle was calculated from the measured count rate. These results indicate that the developed alpha imager is effective in the plutonium dioxide particle measurements at the working sites of nuclear facilities for internal exposure dose evaluation.Yuki MorishitaShunsuke KurosawaAkihiro YamajiMasateru HayashiMakoto SasanoTaisuke MakitaTetsushi AzumaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-11 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Yuki Morishita Shunsuke Kurosawa Akihiro Yamaji Masateru Hayashi Makoto Sasano Taisuke Makita Tetsushi Azuma Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
description	Abstract The internal exposure of workers who inhale plutonium dioxide particles in nuclear facilities is a crucial matter for human protection from radiation. To determine the activity median aerodynamic diameter values at the working sites of nuclear facilities in real time, we developed a high-resolution alpha imager using a ZnS(Ag) scintillator sheet, an optical microscope, and an electron-multiplying charge-coupled device camera. Then, we designed and applied a setup to measure a plutonium dioxide particle and identify the locations of the individual alpha particles in real time. Employing a Gaussian fitting, we evaluated the average spatial resolution of the multiple alpha particles was evaluated to be 16.2 ± 2.2 μmFWHM with a zoom range of 5 ×. Also, the spatial resolution for the plutonium dioxide particle was 302.7 ± 4.6 µmFWHM due to the distance between the plutonium dioxide particle and the ZnS(Ag) scintillator. The influence of beta particles was negligible, and alpha particles were discernible in the alpha–beta particle contamination. The equivalent volume diameter of the plutonium dioxide particle was calculated from the measured count rate. These results indicate that the developed alpha imager is effective in the plutonium dioxide particle measurements at the working sites of nuclear facilities for internal exposure dose evaluation.
format	article
author	Yuki Morishita Shunsuke Kurosawa Akihiro Yamaji Masateru Hayashi Makoto Sasano Taisuke Makita Tetsushi Azuma
author_facet	Yuki Morishita Shunsuke Kurosawa Akihiro Yamaji Masateru Hayashi Makoto Sasano Taisuke Makita Tetsushi Azuma
author_sort	Yuki Morishita
title	Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
title_short	Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
title_full	Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
title_fullStr	Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
title_full_unstemmed	Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
title_sort	plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/91f22855eee44f0d9d59a6ea33d4248e
work_keys_str_mv	AT yukimorishita plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT shunsukekurosawa plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT akihiroyamaji plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT masateruhayashi plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT makotosasano plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT taisukemakita plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection AT tetsushiazuma plutoniumdioxideparticleimagingusingahighresolutionalphaimagerforradiationprotection
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Plutonium dioxide particle imaging using a high-resolution alpha imager for radiation protection

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