Temperature distribution in and around the final storage for BWR-fuel

Temperature distribution in and around the final storage has been calculated for BWR-fuel. The amount of BWR fuel is 1.4 ton per canister. The canister is deposed 40 years after withdrawal from the reactor. The maximum temperature of 76 deg C at the surface of the canister is reached 10 - 20 years after the time of deposition. The highest temperature in the rock, 60 deg C, occurs about 60 years after the deposition. After 100 000 years the temperature in the storage is only a few centigrades above the initial rock temperature. The heat from the storage reaches the ground surface about 200 years after the deposition. The maximum heat flow, 0.15 W/m2, occurs about 2 000 years after deposition and is considered insignificant compared for example with solar energy flow of about 100 W/m2