NUREG-2155, Revision 2: Guidance for Implementation of Physical Protection of Category 1 and Category 2 Quantities of Radioactive Material
Source: NUREG-2155, Revision 2: Guidance for Implementation of Physical Protection of Category 1 and Category 2 Quantities of Radioactive Material (http://www.nrc.gov:80/reading-rm/doc-collections/nuregs/staff/sr2155/r2/)