WEKO3
アイテム
Distributions and impacts of plutonium in the environment originating from the Fukushima Daiichi Nuclear Power Plant accident: an overview of a decade of studies
https://repo.qst.go.jp/records/85980
https://repo.qst.go.jp/records/85980615cc794-8e2f-4510-a429-bd0d7c389ebb
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2022-01-13 | |||||
| タイトル | ||||||
| タイトル | Distributions and impacts of plutonium in the environment originating from the Fukushima Daiichi Nuclear Power Plant accident: an overview of a decade of studies | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Wu, Junwen
× Wu, Junwen× Zheng, Xuemin× Chen, Jishen× Yang, Guosheng× Zheng, Jian× Tatsuo, Aono× Yang, Guosheng× Zheng, Jian× Tatsuo, Aono |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | This study reviews the current knowledge of plutonium (Pu) isotopic composition (the atom or activity ratios) and activities of 238Pu, 239Pu, 240Pu, and 241Pu derived from the Fukushima Daiichi Nuclear Power Plant (FDNPP) accident in 2011. In this critical review, we document the characteristic values of Pu atom or activity ratios (fingerprints) and present their spatial distributions around the FDNPP site. Based on multiple Pu fingerprints (238Pu/239+240Pu activity ratio, 240Pu/239Pu atom ratio, and 241Pu/239Pu atom ratio), we clarify that there was the Pu contamination from the FDNPP accident in a restricted terrestrial area, while Pu in the northwest Pacific Ocean is still predominately sourced from the Pacific Proving Grounds (PPG) and global fallout. Using a simple two end–member mixing model, we calculate average contributions of Pu from the FDNPP accident of 27±34% (n=149) in soils, 55±32% (n=38) in litter samples, and 67±26% (n=129) in air dust/black substances, respectively. In the marine environment, the PPG source contributed 45±15% (n=76) in seawater and 42±12% (n=48) in sediments. The spatial distribution of Pu atom or activity ratios based on existing studies suggest that: 1) in the region investigated 80 km northwest of the FDNPP site, the Pu contamination is mainly observed within an area with a 50 km radius, and 2) in the region investigated 60 km southwest of the FDNPP site, the Pu contamination is mainly observed in a zone with a 30 km radius. Studies of Cs-bearing radioactive particles indicate that Pu occurs as Pu oxide, and the fuel fragments containing Pu that were released from the reactors to the surrounding environment are associated with micron-scale Cs-bearing radioactive particles. It should be noted that the fractionation between Pu and other radionuclides occurred after release. These new findings about the Pu fingerprints around the FDNPP site help us to establish a reference background database for future environmental risk assessment and geochemical study in this region. | |||||
| 書誌情報 |
Journal of Environmental Radioactivity 巻 248, p. 106884, 発行日 2022-04 |
|||||
| 出版者 | ||||||
| 出版者 | Elsevier | |||||
| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0265-931X | |||||
| DOI | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1016/j.jenvrad.2022.106884 | |||||
| 関連サイト | ||||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | https://doi.org/10.1016/j.jenvrad.2022.106884 | |||||
