Atmospheric discharge and dispersion of radionuclides during the Fukushima Dai-ichi Nuclear Power Plant accident, 1; Source term estimation and local-scale atmospheric dispersion in early phase of the accident
福島第一原子力発電所事故における放射性物質の大気放出及び拡散過程,1; 事故初期の放出量推定とプラント周辺地域の大気拡散
堅田 元喜; 太田 雅和; 寺田 宏明; 茅野 政道; 永井 晴康
Katata, Genki; Ota, Masakazu; Terada, Hiroaki; Chino, Masamichi; Nagai, Haruyasu
The source term of $$^{131}$$I and $$^{137}$$Cs discharged in early phase of the Fukushima Dai-ichi Nuclear Power Plant (FNPP1) accident was estimated by combining environmental data with atmospheric dispersion simulations of a computer-based nuclear emergency response system, WSPEEDI-II. Major releases were estimated when air dose rates increased after the hydrogen explosion at Unit 1 during the afternoon on 12 March and during the midnight on 14 March. The high-concentration plumes discharged during these periods caused large deposition to the northwest and south-southwest directions of FNPP1, respectively. The increases of air dose rates observed at the monitoring posts were overall reproduced by WSPEEDI-II using estimated release rates. The simulation indicated that air dose rates significantly increased in the south-southwest region of FNPP1 by dry deposition of the high-concentration plume discharged from the midnight on 14 March to the morning on 15 March.
使用言語 : English
掲載資料名 : Journal of Environmental Radioactivity
: 109
ページ数 : p.103 - 113
発行年月 : 2012/07
出版社名 : Elsevier
特許データ :
論文URL :
キーワード : 福島第一原子力発電所事故; Fukushima Daiichi Nuclear Power Station Accident
使用施設 :
広報プレスリリース :
: 大気中へ放出された放射性物質; WSPEEDIを用いた放出量推定と拡散シミュレーション[/]
受委託・共同研究相手機関 :
登録番号 : AA20110656
抄録集掲載番号 : 40000944
論文投稿番号 : 10960
Accesses  (From Jun. 2, 2014)
- Accesses
分野:Environmental Sciences
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