Conceptual study on thermal analysis for disposal system of spent nuclear fuel

A single canister causes a maximum temperature of 75 ~ 90 degrees Celsius in the heat generating canister depending on the decay heat power. Fig. 1 shows the dimensions and layout of the disposal hole and backfill from the SKB. In this study, thermal analysis results for the KBS-3(V) type are verified and based on this model, the results of the thermal analysis for determining the interval of the disposal space to minimize the area of the Korean HLW repository system. The spacing between disposal holes is one of the important factors in minimizing the disposal area. Therefore, the result of thermal analysis over time is an important parameter to determine the spacing between disposal holes. The numerically and analytically calculated temperature profile histories on the disposal area is an important results, since it proves that the analytic solution using effective design for disposal hole.