What are the design basis threats (DBTs)?
The DBTs provide a general description of the attributes of potential adversaries who might attempt to commit radiological sabotage or theft or diversion against which licensee’s physical protection systems must defend with high assurance. The DBTs have been part of the Nuclear Regulatory Commission’s (NRC) regulations in Title 10 of the Code of Federal Regulations, (10 CFR) Section 73.1, since 1979. The DBTs are regularly reviewed and, when appropriate, revised to reflect changes in the threat environment.
