For ALPS slurry and decontamination equipment sludge, which have high water content rate and are fluid, dehydration treatment equipment is scheduled to be installed in FY2026 for the former, and collection of the latter from the underground storage tank in the building, the current storage site, is scheduled to begin in FY2025, followed by transfer to a storage facility on higher ground in a container after dehydration treatment.

In addition, a solidification policy for unstable materials such as water treatment waste should be established by FY2025. A transition to a more stable state (dehydration or solidification and storage in a facility with the necessary earthquake resistance) is indicated as a further goal to be achieved in the future.

In addition, adsorption towers, which have particularly high radioactivity levels among secondary waste generated from contaminated water treatment, are scheduled to be stored in a large waste storage facility that is currently under construction. On the other hand, R&D is underway on evaluation of corrosion and measure against corrosion of storage container in Government-led R&D Program on Decommissioning and Contaminated Water Management.

The transfer and storage systems are being investigated for solid waste, secondary waste generated from contaminated water treatment, and fuel debris, respectively.

In particular, for fuel debris, basic specifications of storage canister including safety functions and safe transfer conditions are being investigated for gradual expansion of the scale of fuel debris retrieval.

Since it is necessary to sort solid waste and fuel debris rationally from the viewpoint of radioactive waste disposal, work for understanding each property is being proceeded.

In particular, work for understanding the properties of fuel debris is being proceeded along with R&D on property analysis, since information and knowledge on their properties are limited.