Safety approach and engineered safety systems for the APT 3He Target/Blanket System

A preconceptual design has been developed for the 3He Target/Blanket (T/B) System for the Accelerator Production of Tritium (APT) Project. A major part of the design effort was to develop the safety approach and engineered safety systems for this system. The APT safety approach has been developed to ensure with high confidence that a beam trip will occur and adequate cooling will be provided if the target/blanket parameters deviate from the design operating range. The safety approach uses redundant and diverse systems to ensure high reliability for tripping the beam and removing the decay heat. This paper describes the general safety approach and its use of inherent safety features and active- and passive-engineered safety systems to meet or exceed the requirements