A Case Study of Probabilistic Safety Assessment of Radioactive Materials Transport at Tunnel Fires

The Construction of a nuclear-cycle facility at Rok.kasho-mura in Aomori Prefecture in Japan is being planned, and a uranium enrichment plant is already operating there. Vehicle carriers and ships are used to transport SF, UF6, LLW, etc., within Japan and from overseas. As Japan is very mountainous, it is important to investigate the possibility of tunnel fires and a fall from a bridge in evaluating the safety of transporting radioactive materials {RAM). Accident scenario probabilities and their environmental effects should be investigated, particularly since some routes pass through urban areas.