Nuclear Detection Instrumentation for Reactivity Measurements with the Fast Flux Test Facility Engineering Mockup Core

Four multichannel detection systems, two operating in an integrated current mode and two in a pulse mode within the engineering mockup core for the Fast Flux Test Facility reactor, successfully furnished signals during a 5-month reactivity surveillance procedures experiment for evaluation of reactivity measurement methods and associated instrumentation for Liquid Metal Fast Breeder Reactor applications. In addition, the adequacy of the low level flux monitor desigin for the Fast Flux Test Facility was verified.