QWhy is it necessary to discharge ALPS-treated water? Can't it continue to be stored?
ADischarging the ALPS-treated water is necessary in order to free up space at the site to continue decommissioning work safely and without delay. Space at the site is limited and needs to be fully utilized. This includes the ground on which the storage tanks are built.

The tanks built on the premises of the power plant for storing ALPS-treated water are predicted to reach maximum capacity by around summer 2022. Additionally, the ground on which they are built is needed to construct new facilities for the temporary housing of fuel debris and the storage of waste from decommissioning work. These next stages, involving critical tasks such as removing the fuel debris from the reactor building, must be carried out safely and precisely, and to do so the space currently occupied by the tanks is essential.