Alpha Camera has been developed to check the alpha contamination of solid wastes generated during decommissioning of Fukushima Daiichi Nuclear Power Station (1F). A lot of measurements are needed to reveal the alpha contamination distributions due to the narrow field of view of the Alpha Camera. Therefore, in this paper, we propose a novel approach which reconstructs the divided measurement data in a three-dimensional space to identify the contaminated area easily. In primitive demonstration using new recon...
英字タイトル:
Development of 3D reconstruction for remote alpha contamination measurement

Alpha Camera is developed as a remotely-operated detector to check the alpha contamination of wastes generated during decommissioning of Fukushima Daiichi Nuclear Power Station. The smear method is currently used to check the alpha contamination inside the plant. However, a large amount of waste will be generated from future decommissioning. Therefore, in order to reduce the exposure of workers, a remotely-operated alpha detector with wide range is needed. In this paper, to confirm that the Alpha Camera can...
英字タイトル:
Development of remote alpha contamination measurement detector for field application

During operation or regular inspections at power plants, regular patrol inspections are carried out in order to identify abnormalities at the site at an early stage. In the patrol inspection, in addition to recording the confirmation items, the site situation is recorded with images such as photographs and videos. It is a process that consumes the administrator's time because it is necessary to manage photos and videos by collating them with the layout of the building. For the purpose of streamlining these ...
英字タイトル:
Development of information management technology for advanced patrol inspection

At the Fukushima Daiichi Nuclear Power Station, it is critical to (1) confirm the presence of fuel debris inside the PCV that could be melted fuel as a result of the hydrogen explosion followed by the accident; and (2) conduct in-depth investigations prior to decommissioning. However, the conditions inside the PCVs were unknown. Under this circumstance, International Research Institute for Nuclear decommissioning (IRID) and Toshiba ESS jointly developed devices that can access to the lower part of a PCV and...
英字タイトル:
Development of Remotely-Operated Devices for Investigation Inside Primary Containment Vessel (PCV) of Fukushima Daiichi Nuclear Power Station Unit 2 and 3 and Survey Results