| アイテムタイプ |
学術雑誌論文 / Journal Article(1) |
| 公開日 |
2025-12-18 |
| タイトル |
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タイトル |
Internal Dose Assessment in a Plutonium Internal Contamination Accident at JAEA’s Oarai Research and Development Center |
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言語 |
en |
| 言語 |
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言語 |
eng |
| 資源タイプ |
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資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
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資源タイプ |
journal article |
| 著者 |
Kim Eunjoo
Tominaga Takako
Yajima Kazuaki
Tani Kotaro
Takada Chie
Momose Takumaro
Tatsuzaki Hideo
Akashi Makoto
Kurihara Osamu
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| 抄録 |
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内容記述タイプ |
Abstract |
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内容記述 |
Objectives: On June 6, 2017, an accident occurred at the JAEA’s Oarai Research and Development Center, where 5 workers inhaled plutonium. This study aims to evaluate the validity of theinternal dose assessments conducted by the QST and to share the findings with the dosimetrycommunity.Methods: In vivo measurements (lungs and liver) and bioassays were performed. The particlesize of the inhaled material was estimated based on the ratio of early fecal excretion to residuallung content. The absorption types of Pu and 241Am were evaluated using urinary excretionlevels from bioassay results of early fecal and pre-Ca- DTPA urine samples.Results: The estimated particle sizes of the inhaled materials were over 10 μm and severalmicrometers for 2 workers, respectively. The absorption types were evaluated as intermediatebetween M (Moderate) and S (Slow). A change in urinary excretion levels between before andafter Ca-DTPA administration was observed, with the most significant reduction occurring afterthe initial treatment, followed by smaller changes.Conclusions: The internal dose assessments for the 5 workers were confirmed to be conservatively conducted within a reasonable range. Comprehensive individual monitoring in cases ofinternal contamination by actinide is crucial to reducing uncertainties in dose assessment. |
| 書誌情報 |
Disaster Medicine and Public Health Preparedness
発行日 2025-12
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| DOI |
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識別子タイプ |
DOI |
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関連識別子 |
10.1017/dmp.2025.10049 |
