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佐藤 優樹; 峯本 浩二郎*; 根本 誠*
Proceedings of Waste Management Conference 2025 (WM2025) (Internet)), 9 Pages, 2025/03
We have been developing software to visualize the location of radiation sources in three dimensions by importing output data from Compton cameras, survey meters, and SLAM (Simultaneous Localization and Mapping) devices. The software, named COMRIS (COMpton camera for Radiation Imaging System), is GUI-based and visualizes the location of radiation sources by capturing the output data of the above multiple measuring instruments. The authors previously presented an overview of COMRIS and reported the results of visualizing a 
Cs test source in the laboratory by combining a Compton camera and a 3D-Light Detection and Ranging (LiDAR)-based SLAM. However, we have not been able to report how this software is operated on a GUI screen. In addition, an new attempt was made this time to expand the effective field of view (FoV) to both front and rear by preparing two Compton cameras, each of which is sensitive only to the front of the device, and placing them back-to-back. In this work, we report once again on the integration method of output data from SLAM devices and Compton cameras using COMRIS, based on the GUI screen. In addition, data output from two back-to-back Compton cameras and SLAM devices were imported into COMRIS to demonstrate visualization of radiation sources.
Bernard, P.*; Met, F.*; Gerard, D.*; 小嶋 健*; 駒 義和
no journal, ,
An evaluation model to estimate the parameters of waste management from the non-destructive measurement of the radiation was proposed. Based on this, the implementation example of estimating from non-destructive analysis of key-nuclides (Cs, 
Co, 
Eu) in radioactive waste was proposed and issues to be solved for implementation was organized and investigated. The target are waste generated in the frame of the decommissioning of the Fukushima Daiichi NPP after the severe accident, with a very high dose rate (10 Sv/h on the surface of the container). Using Monte Carlo simulations, a measurement system was studied in order to verify the adequacy between these circumstances and the capacity of the system to respond to them, especially for the measurement range and the performances for detection limit. In addition, issues and solution policy for the system implementation was also examined.
佐々木 紀樹
no journal, ,
米国フェニックスにおいて開催される「Waste Management Symposia 2025」のパネルディスカッション「The Latest Decommissioning Information on Japan's Fukushima Daiichi NPPs」において原子力機構(JAEA)の福島第一原子力発電所(1F)廃炉に関する研究開発の状況を発表する。具体的には、1F廃炉に関するJAEAの研究開発の位置づけ、最近の研究開発成果(燃料デブリサンプルの分析、線源逆推定、debris Eye等)の概要について述べる。
森下 祐樹; DiPrete, D.*; Deason, T.*; 永石 隆二
no journal, ,
本研究では、
Puと
Npをオンサイトで測定するためのアルファ粒子イメージング検出器を開発した。サバンナリバー国立研究所でPuとNp酸化物試料の測定に成功し、個々の粒子の放射能とエネルギースペクトルを同時に測定できることを実証した。この能力は、現場でPuとNpを同定するために極めて重要である。アルファイメージング検出器は、施設の除染や環境測定のモニタリングにおいて、アルファ核種の現場での検出に有望である。