Development of realistic RDD scenarios and their radiological consequence analyses.

The terrorist attack on September 11, 2001, brought about deep interest on the radiological dispersal device (RDD) and the malevolent radiological event. In this study, realistic potential scenarios using RDD were developed. Among those probable radionuclides, (137)Cs and (241)Am were selected to simulate the radiological effects caused by dirty bomb. Their radiological consequences were assessed in terms of total effective dose, projected cumulative external and internal dose and ground deposition of radioactivity.