Physical protection against sabotage

INFCIRC 225 Rev. 4 has put more emphasis on physical protection of nuclear material and nuclear facilities against sabotage and has introduced the Design Basis Threat, DBT, as key element of the states physical protection system. By using the DBT the level of physical protection of nuclear material during use, storage, transport and of nuclear facilities is determined. More than the physical protection against unauthorised removal the physical protection against sabotage has interfaces with the nuclear safety field, particularly the physical protection of nuclear facilities. In order to reach the intended level of physical protection a common understanding of DBT, of its role in the regulatory system, the threat behind and its intention, a consensus among all parties involved in the field of physical protection is essential. (author)