Measurements of Nonfission Heating in a High Neutron Flux Reactor

The nonfission (NF) heating and thermal-neutron flux were measured in copper as a function of distance from the core center line of the ORR Reactor at different times of a reactor cycle. Above the core, the NF heating is a linear function of the thermal-neutron flux φ expressed by Within the core the relation between the measured thermal-neutron flux and the NF heating is influenced by other factors.