Consideration of drying system design for the dry storage of spent nuclear fuel

Drying technology of SNF is necessary to store the SNF by the dry storage method. The first trial research for SNF drying from the Pressurized Water Reactor (PWR) is progressing. The short-term operation is a series of working process within an SNF storage building before the SNF transportation from the storage pool to a dry storage. The processes of short-term operation are SNF loading in cask, cask transfer, cask decontamination, canister internal drainage, canister internal drying and inert gas filling in the canister. Canister internal drying process is the important process to secure the integrity of long-term dry storage of SNF. Canister internal drying process can consider the important process to secure the integrity of long-term dry storage of spent nuclear fuel. We conducted the review the design of drying system for the dry storage of SNF from PWR. It is includes the survey of commercialized drying methods and system, related standards, any criteria to complete drying process.