Patent ID: 6420712
Filing Date: 2002-07-16
Classification: G01T

Abstract:
Apparatus for increasing the sensitivity of measuring the amount of radioactive material in waste utilizing localized neutron coincidence vetoes to reduce the interference caused by cosmic ray generated neutrons, said apparatus comprising:a) a plurality of neutron detectors, each of said detectors including means for generating a pulse in response to the detection of a neutron; and b) means, coupled to each of said neutron detectors, for counting only some of said pulses from each of said detectors, whether cosmic ray or fission generated, said means for counting including means that, after counting one of said pulses from a given one said detectors, vetos the counting of additional ones of said pulses for a prescribed period of time from said given one of said detectors without vetoing all of said pulses from all of said detectors.