A complete programme aimed at addressing the malevolent use of radioactive sources needs to consider a large range of issues including: the appropriate design and manufacture of sources, the various means of acquisition of sources, the prevention of use any sources acquired, and the mitigation of the impacts if sources are used maliciously. In this paper will be described the process to determine what level of security is required for sources throughout their lifecycle, and the assignment level of security is required for sources throughout their lifecycle, and the assignment of security measures to sources based on graded performance requirements to deter, detect, and if necessary respond to theft of radioactive material. by Rini Rindayani
