Basic Study on the Design and Construction of Cementitious Materials used for the Low-level Radioactive Waste Disposal
By K. Niwase, Y. Tsukinaga and Y. Tsuji
Concrete Journal, Vol.50, No.7, Jul. 2012
- Synopsis
- This report presents the design and construction of cementitious materials used for the low-level radioactive waste disposal, in terms of the required performance and techniques. Especially from the viewpoint of system performance, long-term durability (e.g. over 10000 years) of cementitious materials needs to be further investigated. In order to quantitatively verify the design requirement on the low diffusion layer: the leakage speed should be reduced by controlling the diffusion of radionuclides, we determined to use a diffusion coefficient as an index for the verification because it is considered as the simplest way to numerically indicate the diffusion performance of members. We deemed the diffusion coefficient of the layer can be verified by the overall equivalent value which is related to an area ratio of healthy portion to other domains that changed in state due to deterioration.
- Keywords:
- radioactive waste, sub-surface disposal, low diffusion layer, cracks control, low leaching
