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福島県立医科大学学術成果リポジトリ = Fukushima Medical University Repository >
福島医学会 = The Fukushima Society of Medical Science >
Fukushima Journal of Medical Science >
Vol.57 (2011) >
このアイテムの引用には次の識別子を使用してください:
http://ir.fmu.ac.jp/dspace/handle/123456789/305
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| タイトル: | Radiation measurements at the campus of Fukushima Medical University through the 2011 off the Pacific Coast of Tohoku earthquake and subsequent nuclear power plant crisis |
| その他のタイトル: | Radiation measurements at the campus of FMU |
| 著者: | Kobayashi, Tsuneo |
| 学内所属: | 自然科学講座（物理学） |
| 誌名/書名: | Fukushima Journal of Medical Science |
| 巻: | 57 |
| 号: | 2 |
| 開始ページ: | 70 |
| 終了ページ: | 74 |
| 発行日: | 2011年 |
| 抄録: | An earthquake, Tohoku region Pacific Coast earthquake, occurred on the 11th of March, 2011, and subsequent Fukushima nuclear power plant accidents have been stirring natural radiation around the author's office in Fukushima Medical University (FMU). FMU is located in Fukushima city, and is 57 km (35 miles) away from northwest of the Fukushima Daiichi nuclear power plant. This paper presents three types of radiation survey undertaken through the unprecedented accidents at the campus and the hospital of FMU. First, a group of interested people immediately began radiation surveillance; the group members were assembled from the faculty members of " Life Sciences and Social Medicine" and " Human and Natural Sciences." Second, the present author, regardless of the earthquake, had serially observed natural radiations such as gamma radiation in air with NaI scintillation counter, atmospheric radon with Lucas cell, and second cosmic rays with NaI scintillation. Gamma radiation indicated most drastic change, i.e., peak value (9.3 times usual level) appeared on March 16, and decreased to 1.7 times usual level after two months. A nonlinear least squares regression to this decreasing data gave short half-life of 3.6 days and long half-life of 181 days. These two apparent half-lives are attributed to two groups of radioisotopes, i.e., short half-life one of I-131 and long half-life ones of Cs-134, Cs-137 and Sr-90. Also, atmospheric radon concentration became high since a stop of ventilation, while second cosmic rays did not show any response. Third, late April, 2011, a team of radiation dosimetry under the direct control of Dean, School of Medicine, was established for the continuation of radiation survey in the campus and the hospital of Fukushima Medical University. |
| 出版者: | The Fukushima Society of Medical Science |
| 出版者（異表記）: | 福島医学会 |
| 本文の言語: | eng |
| このページのURI: | http://ir.fmu.ac.jp/dspace/handle/123456789/305 |
| 本文URL: | http://ir.fmu.ac.jp/dspace/bitstream/123456789/305/1/FksmJMedSci_57_p70.pdf |
| ISSN: | 0016-2590
2185-4610 |
| DOI: | 10.5387/fms.57.70 |
| PubMed番号: | 22353655 |
| 異版(出版者版等): | http://dx.doi.org/10.5387/fms.57.70 |
| 権利情報: | © 2011 The Fukushima Society of Medical Science |
| 出現コレクション: | Vol.57 (2011)
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