Development of tritium migration model in soil and demonstration of suppression measures to tritium expansion

2016 Fiscal Year Final Research Report

• Project/Area Number: 25709087
• Research Category: Grant-in-Aid for Young Scientists (A)
• Allocation Type: Partial Multi-year Fund
• Research Field: Nuclear fusion studies
• Research Institution: Kyushu University
• Principal Investigator: Katayama Kazunari 九州大学, 総合理工学研究科(研究院), 准教授 (90380708)
• Project Period (FY): 2013-04-01 – 2017-03-31
• Keywords: トリチウム / 土壌 / 同位体交換反応 / 透水 / 汚染 / 除染

Outline of Final Research Achievements

Fundamental experiments were carried out for understanding tritium migration behavior in a soil by using natural soil samples which were collected in six places of Hakozaki campus of Kyushu University. In tritiated water percolation experiments, a certain amount of tritiated water was poured in a soil packed bed, and effluent water and tritium concentration in the water were monitored. It was revealed from water-tritium balance that tritium retention in the soil packed bed is larger than water retention in that. This is an effect of the isotope exchange between tritium supplied and hydrogen included in soil as adsorbed water, interlayer water, structural water etc. This result indicates that it is not appropriate to simply apply water migration model to a prediction of tritiated water migration in the soil.

Free Research Field

化学工学