Safety Circuits for Critical Assemblies

Safety circuit designs for Critical Assemblies are somewhat different in concept from those applied to power reactors due to differences in operation and to different importance factors attached to various possible failure modes. The development of such circuit designs is described to illustrate past and current practices which have been found practical, efficient, and reliable. A number of problem areas and their solutions are given in order that similar problems might be avoided in future design. Directions for future development effort are indicated.