Novel real-time 3D radiological mapping solution for ALARA maximization, D&D assessments and radiological management

Good management of decontamination and dismantling (D&D) operations or maintenance activities in contaminated or irradiating zones requires perfect radiological knowledge of the radioactive environment in order to optimize personnel dose and minimize of waste volume; this knowledge itself must be acquired safely and securely in a time-saving way. Additionally, Fukushima accident has imposed a stretch to the nuclear measurement operational approach required in such emergency situation: fast deployment and intervention, quick analysis and fast scenario definition. AREVA, as return of experience from its activities carried out at Fukushima and D&D sites, has developed a novel multi-sensor solution as part of its D&D research, approach and method, a system with real-time 3D photorealistic spatial radiation distribution cartography of contaminated premises. The system may be handheld or mounted on a mobile device (robot, drone, e.g.). In this paper, we will present our current development based on a SLAM technology (Simultaneous Localization And Mapping) and integrated sensors and detectors allowing simultaneous topographic and radiological (dose rate and/or spectroscopy) data acquisitions. This enabling technology permits 3D gamma sources cartography in a reconstructed volume in real-time.