Concentrated effluent and phosphate effluent at the Tokai Reprocessing Plant will be treated at the LWTF for disposal underground. To reduce the disposal cost, the concentrated effluent will be separated into a slurry effluent including radionuclides and a nitrate effluent that barely contains any radionuclides. It is planned that the nitrate in the nitrate effluent will decompose and change into carbonate to reduce nitrate-nitrogen emission at a disposal site.