Annual report for FY2017 on the activities of Department of Decommissioning and Waste Management. April 1, 2017 - March 31, 2018

This report describes the activities of Department of Decommissioning and Waste Management (DDWM) in Nuclear Science Research Institute (NSRI) in the period from April 1, 2017 to March 31, 2018. The report covers organization and missions of DDWM, outline and operation/maintenance of facilities which belong to DDWM, treatment and management of radioactive wastes, decommissioning activities, and related research and development activities which were conducted in DDWM. In FY2017 radioactive wastes generated from R&D activities in NSRI were treated safely. They were about 170 m³ of noncombustible solid wastes and 162 m³ of liquid wastes. After adequate treatment, 1,962 waste packages (in 200 L-drum equivalent) were generated. The total amounts of accumulated waste packages were 128,575 as of the end of FY2017 due to efforts of the restitution of waste packages to the Japan Radioisotope Association and volume reduction treatments of the stored waste packages. Decommissioning activities were carried out for the JAEA's Reprocessing Test Facility (JRTF) and the Liquid Waste Treatment Facilities. As for the R&D activities, studies on radiochemical analyses of wastes for disposal and JRFT decommissioning technologies were continued. In order to pass the conformity review on the New Regulatory Requirements for waste management facilities, the amendment of reactor installation license is under the review by the Nuclear Regulation Authority. (author)