〔ＥＸ－ＳＦＫ〕 米国の放射能測定ネットワーク（ＮＡＤＰ）の２割、２９地点ででフクイチ発の降水降下物を確認 アメリカ地質調査所（ＵＳＧＳ）の研究チームが発表 放射性ヨウ素、セシウム アラスカから本土全域を低濃度汚染！

　→　http://ex-skf.blogspot.com/2012/02/usgs-paper-wet-deposition-of-fission.html

　「ＥＸ－ＳＦＫ」さんの情報！（なお、見出し、本文記事の文責は大沼）

　添付マップによると、アラスカの３地点を含む、全米２９地点で、フクイチ由来の放射性ヨウ素、セシウムが検出されている。いずれも、降水による降下物。例によって「人体への影響への懸念はない」とクギを指している。

　◇ＵＳＧＳ　プレスリリース　New Study Confirms Low Levels of Fallout
from Fukushima and Enhances Knowledge　→　http://bqs.usgs.gov/fukushima/USGS%20Fukushima%20Fallout%20News%20Release%20Feb22.pdf

　◇アブストラクト　USGS Measures Fallout from Fukushima in US NADP Precipitation Samples　→　http://bqs.usgs.gov/fukushima/　

　USGS and the National Atmospheric Deposition Program (NADP) networks measured fission-product isotopes in the U.S. from the Fukushima Dai-ichi nuclear power facility atmospheric release incidents, which occurred March 12 and 14, 2011 near Sendai, Japan.  This project added to the body of knowledge about radioactive fallout from the March 12-14, 2011 incident and exhibited the capabilities of the USGS and NADP to respond to an unexpected atmospheric release. 

Following the disaster, radioactive iodine and radioactive cesium were detected in precipitation samples collected in the U.S. at NADP sites. Detectable quantities of Iodine-131, Cesium-137 and Cesium-134 were observed at approximately 20% of the NADP locations where precipitation was sampled between March 15 and April 5, 2011.  Radioactive iodine and cesium are often some of the largest contributors to human radiation doses after an accident at a nuclear reactor.  Fallout amounts measured in precipitation by NADP were similar to amounts measured by other organizations, which were determined to be well below any level of public health concern.

Methods and results of the study are documented in USGS Open-File Report 2011-1277.  The data are interpreted and compared to measurements of others in an article published in Environmental Science and Technology, March 6, 2012.  A list of frequently asked questions (FAQs) pertaining to the study is available via the link provided below.……