バックエンド技術部年報(2024年度)

Annual report for FY2024 on the activities of Department of Decommissioning and Waste Management (April 1, 2024 - March 31, 2025)

バックエンド技術部

Department of Decommissioning and Waste Management

本報告書は、日本原子力研究開発機構原子力科学研究所バックエンド技術部における2024年度の活動を報告するものである。所掌する施設の運転・管理、放射性廃棄物の処理・管理、施設の廃止措置に関する業務、これらに関連する技術開発業務の概要をとりまとめた。2024年度の放射性廃棄物の処理実績は、可燃性固体廃棄物が約165m、不燃性固体廃棄物が約185m、液体廃棄物が約232mであった。2024年度末の累積保管廃棄本数(200Lドラム缶換算)は前年度から937本増の119,601本となった。また、放射性廃棄物処理場の新規制基準対応を進めた。廃止措置に関しては、再処理特別研究棟及びプルトニウム研究1棟において、機器の撤去等を実施した。また、技術開発においては、廃棄物放射能評価法の構築に向けた廃棄物試料の放射能データの取得や環境省及び東海村の要請により福島第一原子力発電所事故に伴い発生した除去土壌の埋立処分に関する実証事業に取り組んだ。

This report summarizes the activities carried out in FY2024 by the Department of Decommissioning and Waste Management (DDWM) at the Nuclear Science Research Institute (NSRI). It provides an overview of the operations and maintenance of the assigned facilities, the treatment and management of radioactive waste, decommissioning activities, and related technical development work. In FY2024, radioactive waste generated from R&D activities at NSRI was safely treated, including approximately 165 m of combustible solid waste, 185 m of non-combustible solid waste, and 232 m of liquid waste. As of the end of FY2024, the cumulative volume of stored waste packages reached 119,601 (in 200-liter drum equivalents), representing an increase of 937 packages compared with the previous fiscal year. In addition, efforts were made to comply with the new regulatory requirements for waste management facilities. With regards to decommissioning activities, equipment removal and related work were carried out at the Japan Reprocessing Test Facility (JRTF) and the Plutonium Research Building No.1. In the field of technical development, radioactivity data were obtained from waste samples toward the establishment of waste radioactivity evaluation methods. Furthermore, at the request of the Ministry of the Environment and Tokai-mura office, JAEA conducted a demonstration project on the landfill disposal of the contaminated soil generated by the accident of the Fukushima Daiichi Nuclear Power Station.