Estimation of Te-132 Distribution in Fukushima Prefecture at the Early Stage of the Fukushima Daiichi Nuclear Power Plant Reactor Failures
详细信息 查看全文
- 作者：Keiko Tagami ; Shigeo Uchida ; Nobuyoshi Ishii ; Jian Zheng
- 刊名：Environmental Science & Technology (ES&T)
- 出版年：2013
- 出版时间：May 21, 2013
- 年：2013
- 卷：47
- 期：10
- 页码：5007-5012
- 全文大小：314K
- 年卷期：v.47,no.10(May 21, 2013)
- ISSN：1520-5851
文摘
Tellurium-132 (132Te, half-life: 3.2 d) has been assessed as the radionuclide with the third largest release from the Fukushima Daiichi Nuclear Power Plant (FDNPP) in March 2011; thus it would have made some dose contribution during the early stage of the reactor failures. The available data for 132Te are, however, limited. In this study, available reported values of other isotopes of Te were compiled to estimate 132Te concentration (in MBq m鈥?). It was found that 132Te and 129mTe (half-life: 33.6 d) concentrations were well correlated (R = 0.99, p < 0.001) by t test. Thus, 132Te concentrations on March 11, 2011 were estimated from 129mTe using the concentration conversion factor (132Te /129mTe) of 14.5. It was also found that since deposited 129mTe was well retained in the soil, the data collected in March鈥揗ay of 2011 were applicable to 132Te estimation. It was possible to obtain the first 132Te concentration contour map for the eastern part of Fukushima Prefecture, including data from within the 20-km exclusion zone around the FDNPP, using these newly available estimated 132Te data sets.