Risk assessment approach for sabotage and dirty-bomb

Suzuki, Mitsutoshi; Ihara, Hitoshi; Kuno, Yusuke; Kitamura, Takafumi

In terms of the countermeasure of physical protection for nuclear material transport and nuclear facility, it is very important to consider the protection method for subotage and radiological dispersal device (RDD). In this study, we will introduce the foreign coutermeasures for those threats, and show the effectiveness of a statistical method using metorogical and dispersion calculations instead of the conventional method using gauss-plume calculations. Moreover, fluid dynamic calculations enable us to evaluate the risk assessment in the urban area.