Nuclear Regulatory Commission 10 C.F.R. 37, A New Rule to Protect Radioactive Material: Background, Summary, Views from the Field [December 14, 2012] [open pdf - 590KB]
"This report analyzes 10 C.F.R. 37, a forthcoming rule promulgated by the Nuclear Regulatory Commission (NRC), 'Physical Protection of Byproduct Material.' 'Byproduct material' includes specified types of radioactive material other than uranium or plutonium. The rule regulates byproduct material of types and in quantities that could be used to make a 'dirty bomb.' Congress may find this analysis of interest for several reasons: Congress attaches great importance to protecting the United States against terrorist threats; the rule will affect the many industrial, research, and medical activities nationwide that use radioactive materials, thereby affecting many constituents and raising cost-benefit issues; and there is wide concern about regulation and radiation more generally."
CRS Report for Congress, R42868
Federation of American Scientists: http://www.fas.org/sgp/crs/index.html