Abstract A series of discussions on tritiated water of the Fukushima Daiichi Nuclear Power Station (FD-NPS) was carried out. A large amount of contaminated water has been generated in FD-NPS. Radioisotopes in the contaminated water have been removed except tritium, and thus, tritiated water has been left and stored. As of March 2019, 1 126 500 m3 of tritiated water has been stored in tanks. The average tritium concentration in the tritiated water is 1000 Bq/cm3. Various options for handling the tritiated water, such as discharge into the sea, geosphere injection, underground burial, and vapor or hydrogen release with and without pretreatment, were discussed on the basis that there is no scientific impact on people. Through the discussions, 11 options for handling tritiated water were summarized. At the same time, some experimental tests of tritium separation (with small-scale and/or full-scale component test stands) were also carried out. As a result, it was concluded that the tested separation technologies could not yet be applied to the case of FD-NPS. No selection from the 11 options has yet been recommended, and further discussions for the tritiated water have continued with public hearings.

中文翻译：

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福岛第一核电站氚水处理探讨

摘要 对福岛第一核电站（FD-NPS）氚水进行了一系列讨论。FD-NPS 产生了大量的污染水。除氚外，污染水中的放射性同位素已被去除，因此氚化水已被留下和储存。截至 2019 年 3 月，1 126 500 立方米氚水已储存在水箱中。氚化水中的平均氚浓度为 1000 Bq/cm3。在对人类没有科学影响的基础上，讨论了处理氚化水的各种选择，例如排放入海、地圈注入、地下掩埋以及经过和未经预处理的蒸汽或氢气释放。通过讨论，总结了 11 种处理氚化水的方案。同时，还进行了一些氚分离实验测试（使用小规模和/或全规模组件测试台）。因此，得出的结论是，所测试的分离技术尚不能应用于 FD-NPS 的情况。尚未建议从 11 个选项中选择任何选项，关于氚化水的进一步讨论仍在继续进行公开听证会。