Abstract
An intercomparison of the response of different photon and neutron detectors was performed in several measurement positions around a spent fuel cask (type TN 12/2B) filled with 4 MOX and 8 UO 2 15 × 15 PWR fuel assemblies at the nuclear power plant Gösgen (KKG) in Switzerland. The instruments used in the study were both active and passive, photon and neutron detectors calibrated either for ambient or personal dose equivalent. The aim of the measurement campaign was to compare the responses of the radiation instruments to routinely used detectors. It has been shown that especially the indications of the neutron detectors are strongly dependent on the neutron spectra around the cask due to their different energy responses. However, routinely used active photon and neutron detectors were shown to be reliable instruments. ► Response of different detectors around a spent fuel cask is compared. ► We use active and passive, photon and neutron detectors. ► We measure on two positions the neutron spectrum with Bonner spheres. ► Indications of neutron detectors are strongly dependent on neutron spectra. ► Routinely used detectors were shown to be reliable instruments.
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