Abstract
As high-beta-gamma-LLW (low-alpha-ILW) has high nuclide concentration, it is necessary for safe disposal to avoid direct human contact to the waste.
This report describes whether the existence of high-beta-gamma-LLW repository can be detected or not, if underground space utilization is planned at the area of the closed repository in the relatively deep space in the future.
Based on survey items prior to utilization in relatively deep areas, the possibility of anomaly finding is considered in three stages on present technologies. For these three stages are as follows :
(1) by records (or in mind),
(2) by geophysical prospecting, and
(3) by construction control.
As the result, one can reveal the existence of the repository in one or some stage(s), that is, one can avoid the direct human contact to the disposed waste, even if he plans to utilize a underground repository space.
