Graduate School of Arts and Sciences, University of Tokyo, 3-8-1 Komaba, Meguro, Tokyo, 153-8902, Japan.
Department of Environmental and Radiological Health Sciences, Colorado State University, Fort Collins, CO, 80523, USA.
Sci Rep. 2020 Nov 16;10(1):19925. doi: 10.1038/s41598-020-76964-9.
There has been tritium groundwater leakage to the land side of Fukushima Dai-ichi nuclear power plants since 2013. Groundwater was continuously collected from the end of 2013 to 2019, with an average tritium concentration of approximately 20 Bq/L. Based on tritium data published by Tokyo Electric Power Company Holdings (TEPCO) (17,000 points), the postulated source of the leakage was (1) leaks from a contaminated water tank that occurred from 2013 to 2014, or (2) a leak of tritium that had spread widely over an impermeable layer under the site. Based on our results, sea side and land side tritium leakage monitoring systems should be strengthened.
自 2013 年以来，福岛第一核电站有氚地下水泄漏到陆地一侧。从 2013 年底到 2019 年，地下水被持续收集，平均氚浓度约为 20 Bq/L。基于东京电力公司控股公司（TEPCO）公布的氚数据（17000 个点），泄漏的假定来源为：（1）2013 年至 2014 年期间，污染水箱发生泄漏，或（2）氚在该场地下不透水层中广泛扩散的泄漏。根据我们的结果，应加强海侧和陆侧氚泄漏监测系统。
