Assessment of Safety Criteria of Indian SFR with respect to International Scenarios

The core is monitored by functionally diverse sensors: • Neutron detectors to monitor the power and provide signals for safety action by SCRAM on parameters like linear power, period and reactivity; • 3 fast response thermocouples to monitor central fuel subassembly sodium outlet temperature and two thermocouples each within a single thermo-well to monitor other individual SA sodium outlet temperatures; • Thermocouples within thermo-well in each of the two primary sodium pump suction side to monitor the reactor inlet temperature; • Eddy current flow meter to measure the flow delivered by the primary sodium pump, thereby to monitor power to flow ratio; • The pump discharge head and speed are measured and used a trip parameter for pipe rupture and pump seizure respectively; • Failure of fuel is detected by monitoring the cover gas fission product activity and Delayed Neutron Detection (DND) in the primary coolant.