Annual report for FY2020 on the activities of Department of Decommissioning and Waste Management (April 1, 2020 - March 31, 2021)

Department of Decommissioning and Waste Management

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, 2020 to March 31, 2021. 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 FY2020 radioactive wastes generated from R&D activities in NSRI were treated safely. They were about 267 m of combustible solid wastes and 233 m of noncombustible solid wastes and 78 m of liquid wastes. After adequate treatment, 1,448 waste packages (in 200 L-drum equivalent) were generated. The total amounts of accumulated waste packages were 130,604 as of the end of FY2020 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), the Liquid Waste Treatment Facilities, the Compaction Facilities, and Fusion Neutronics Source (FNS) facilities. As for the R&D activities, studies on radiochemical analyses of wastes for disposal were continued. In order to pass the conformity review on the New Regulatory Requirements for waste management facilities, the Approval of the design and construction method was applied sequentially for the Nuclear Regulation Authority. The ministry of the Environment and Tokai-mura office requested JAEA to dispose of the contaminated soil generated by the accident of the Fukushima Daiichi Nuclear Power Station. The monitoring work at the playground was conducted during this period.