Year
1977
Abstract
The Engineered Safeguards System (ESS) to protect advanced nuclear fuel cycles against internal and external threats from terrorists and others has been under development since early 1976. An important role of the ESS is the detection and prevention of the covert activities which may result in theft of SNM or sabotage. This role is fulfilled by the implementation of effective closed-loop controls through access control elements and operational control elements. The methodology for the development of requirements for the safeguards elements, called Operational Control Analysis, and its applicability to less structured activities, such as maintenance, is described.