[1I06-10] Waste Management 2

[1I06] Research on long-term storage system of high-level radioactive waste (fuel debris, etc.) by double canister

Hiroshige Kikura¹, Hideharu Takahashi¹, Daisuke Ito², Yoshinobu Morimoto³, *Tsutomu Matsumoto⁴ (1. Tokyo Tech, 2. Kyoto Univ., 3. Hitz, 4. OCL)

Keywords:High level waste storage, Fuel debris, Stress corrosion cracking, Double canister

For storage of high-level waste (fuel debris, etc.), it is desirable to store it in a sealed container due to its large amount of radioactivity. Considering the possibility of long storage period, it is appropriate to use a welded stainless steel canister for the sealed container, but there is a problem of SCC of stainless steel due to sea salt particles in the storage environment in Japan. Therefore, as a measure against SCC, we investigated the concept of a system for long-term storage of high-level waste using a double canister with a secondary canister made of carbon steel.