Abstract: A system for criticality incident detection is described. The system comprises a plurality of sensors at least partially comprised of storage phosphors. The sensors are distributed throughout the environment to be monitored. The sensors are coupled to a central detection system comprised of at least a luminescence detector and a processor. The luminescence detector measures the luminance of the sensors and provides that measurement to the processor. The processor then calculates the radiation level that the luminance measurement corresponds to. In other embodiments, monitoring units are installed in various portions of the environment being monitored. The monitoring units accept the sensors and are coupled to the central detection system so that the remote monitoring units can be interrogated from the central detection system.

Abstract: A neutron monitoring instrument, principally of the survey type, is provided with an inner neutron detector(s) enclosed in a layer of neutron attenuating material and one or more outer neutron detectors provided on the attenuating layer and enclosed in a layer of neutron moderating material. The inner detector(s) monitor neutrons in the 100 KeV to 15 MeV energy range, with the outer detectors monitoring neutrons in the thermal to 100 KeV range. Sensitivity across the spectrum and evenness of response are improved compared with the prior art to give better close equivalence determinations.