How land use from remote sensing is very helpful for terrestrial radiecological expertise? Application to Fukushima (Japan)

For controlled or accidental releases involving natural or artificial radioactive materials into the environment, IRSN (Institut de Radioprotection et de SÛreté Nucléaire - French Institute for Radiological Protection and Nuclear Safety) has the particular duty to advise public authorities in their decision making, for the protection of the population and the environment. For effectively answering to this mission, IRSN has set up an organization equipped with robust software that allows it to make a diagnosis of the situation and a prognosis of its evolution. In this sense, the knowledge of the landuse concerned is essential.