Online embedded integrated scanning system for identifying failed fuel sub assemblies in fast reactor

The physical integrity of the fuel in fast reactor is of utmost concern for the healthiness of the reactor and operating people. Hence details of the failed fuel location in the core shall be determined at the earliest, to minimize reactor down time and radiation exposure. In the present reactor under construction, i.e., 500 MWe Prototype Fast Breeder Reactor (PFBR), a system for failed fuel identification, was proposed. The system follows a novel scheme to locate the failed fuel using failed fuel location module along with necessary instrumentation and control. This paper details out the scheme followed.

► It is proposed to make a single selector valve to avoid the mechanical complexity for all the 198 fuel sub assemblies. ► The instrumentation and control is to be made into an embedded system. ► The motor is to be made ac induction motor with DSP processor to control. ► Algorithm for PID controller is being refined to make digital.