| Budget Amount *help |
¥22,100,000 (Direct Cost: ¥17,000,000、Indirect Cost: ¥5,100,000)
Fiscal Year 2016: ¥2,860,000 (Direct Cost: ¥2,200,000、Indirect Cost: ¥660,000)
Fiscal Year 2015: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2014: ¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥12,350,000 (Direct Cost: ¥9,500,000、Indirect Cost: ¥2,850,000)
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| 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.
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