Tritium in Japanese precipitation following the March 2011 Fukushima Daiichi Nuclear Plant accident
| Autor: | Gen Shimoda, Hiroyuki Kagi, Teruyuki Maruoka, Takuya Matsumoto, Kyoko Hagino, Chinmaya Sambandam, Pradeep K. Aggarwal, Philipp Martin Klaus, Koshi Yamamoto, Katsuhiko Suzuki, Hajime Obata, Takehiro Mitsuguchi, Daniela Brummer, Naotaka Tomioka |
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| Rok vydání: | 2012 |
| Předmět: |
Radionuclide
Environmental Engineering Time Factors Chemistry Rain Radiochemistry Nuclear plant Tritium Pollution Rainwater harvesting law.invention Fukushima daiichi law Radiation Monitoring Environmental chemistry Nuclear power plant Environmental Chemistry Fukushima Nuclear Accident Precipitation Waste Management and Disposal Radioactive Pollutants |
| Zdroj: | The Science of the total environment. |
| ISSN: | 1879-1026 |
| Popis: | Tritium concentrations in Japanese precipitation samples collected after the March 2011 accident at the Fukushima Dai-ichi Nuclear Power Plant (FNPP1) were measured. Values exceeding the pre-accident background were detected at three out of seven localities (Tsukuba, Kashiwa and Hongo) southwest of the FNPP1 at distances varying between 170 and 220 km from the source. The highest tritium content was found in the first rainfall in Tsukuba after the accident; however concentrations were 500 times less than the regulatory limit for tritium in drinking water. Tritium concentrations decreased steadily and rapidly with time, becoming indistinguishable from the pre-accident values within five weeks. The atmospheric tritium activities in the vicinity of the FNPP1 during the earliest stage of the accident was estimated to be 1.5 × 10 3 Bq/m 3 , which is potentially capable of producing rainwater exceeding the regulatory limit, but only in the immediate vicinity of the source. |
| Databáze: | OpenAIRE |
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