Passive Negative-Reactivity Injector for a Lead-Cooled Fast Reactor

Abstract

A passive system for introducing an absorbing material into the core without any mechanical motions is incorporated in the BR-1200 lead-cooled fast reactor. The structural arrangement of the setup and the results of calculations of transient regimes in the BR-1200 reactor are described. A system with such setups included in the core will make it possible to lower the maximum fuel, fuel-element cladding, and coolant temperatures below the design limits, including in the event of accidents with multiple failures, and to completely suppress a fission chain reaction if the efficiency of the system is high enough.