| Budget Amount *help |
¥42,510,000 (Direct Cost: ¥32,700,000、Indirect Cost: ¥9,810,000)
Fiscal Year 2016: ¥6,110,000 (Direct Cost: ¥4,700,000、Indirect Cost: ¥1,410,000)
Fiscal Year 2015: ¥7,280,000 (Direct Cost: ¥5,600,000、Indirect Cost: ¥1,680,000)
Fiscal Year 2014: ¥10,920,000 (Direct Cost: ¥8,400,000、Indirect Cost: ¥2,520,000)
Fiscal Year 2013: ¥18,200,000 (Direct Cost: ¥14,000,000、Indirect Cost: ¥4,200,000)
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| Outline of Final Research Achievements |
In consideration of embedding radioactive waste in the subsurface where the liquid-solid ratio is small and saturated by groundwater, the confinement function of calcium silicate hydrate (hereinafter referred to as CSH) was examined by using mainly iodide ions.
While CSH is the main component of cement, it is known that Ca gradually leaches due to alteration. However, even if the Ca/Si molar ratio 1.6 of ordinary cement decreases to 0.4, the results in this study showed that the CSH confines iodine undergoing a form dissolved in the hydration water. Furthermore, such a confinement function also appeared in the flow field of groundwater. This means that in a geological disposal system CSH itself repairs the barrier damaged by crustal deformation and so on.
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