Abstract
This paper presents a compilation of experimental data on radiation fields found in commercial nuclear power plants. Exposure rates for systems and components are described by average values, although these averages may be significantly low (by orders of magnitude) near localized “hot spots”. Conditions for, and exposure rates from, important fields are cited for both normal and abnormal operating conditions. Away from hot primary components, exposure rates for both γ and neutron fields typically range from 0 to 1000 mrem h −1. Photon fields are most frequently the result of decay from neutron activated materials or fission product deposits. Neutron fields exhibit well-moderated spectra, with few neutrons above 750 keV. There seems to be no correlation between γ and neutron fields in a typical nuclear power plant outside the reactor core.
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