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Effects of marine pollution with radionuclides after the Fukushima Daiichi Nuclear Power Station accident
https://repo.qst.go.jp/records/73235
https://repo.qst.go.jp/records/73235d4bd333d-9fc4-4182-90dc-fa5e6bf3eac4
| Item type | 会議発表用資料 / Presentation(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2015-05-27 | |||||
| タイトル | ||||||
| タイトル | Effects of marine pollution with radionuclides after the Fukushima Daiichi Nuclear Power Station accident | |||||
| 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_c94f | |||||
| 資源タイプ | conference object | |||||
| 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 |
青野, 辰雄
× 青野, 辰雄× 青野 辰雄 |
|||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | An accident of the TEPCO’s Fukushima Daiichi Nuclear Power Station (FDNPS) has been passed about over four years since March 2011. Marine pollution had been caused by two major sources after the accidents. One is the release to the atmosphere to 23 March 2011. In the terrestrial environment, many kinds of radionuclides, such as iodine(I), caesium(Cs), tellurium, strontium, plutonium(Pu) and silver(Ag) were observed in the eastern Japan. The other is that the high-contaminated water in FDNPS had directly released to ocean in early April 2011. The pre-accident levels of 137Cs activities in seawater and sediments in the coastal areas around Japan were observed 1–2 mBq/L and 1 Bq/kg-dry, respectively. Direct release of the contaminated water to the ocean had caused the high levels of radiocaesium (134Cs+137Cs) and 131I in seawater, sediments and biota in the coastal area of Fukushima during the end of March to the early April. After the release of contaminated water had stopped, the Cs and I activities in seawater had exponentially decreased more than 10 times compared to the activities before the accident over time. However, the activities in sediment and marine biota have decreased more slowly than those in seawater and had large fluctuations. Fukushima-derived radionuclides were observed with the gamma-ray spectrometry, were 134Cs, 137Cs and 110mAg in sediments and marine biota around off Fukushima. 90Sr were not detected in the bony parts of fish and 239+240Pu activities in visceral parts were the same levels as before the accident. The dispersion of radionuclides released from the FDNPS in marine environment are summarized with the simulation models and the effects of activities and radiation for marine biota are also discussed with some assessment models. | |||||
| 会議概要（会議名, 開催地, 会期, 主催者等） | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | ICRR2015 15th International Congress of Radiation Research | |||||
| 発表年月日 | ||||||
| 日付 | 2015-05-26 | |||||
| 日付タイプ | Issued | |||||
