Study on the Plutonium Holdup Measurement in Glove-Box

Based on passive total neutron counting with the 3He detectors, an assay system that can define the plutonium holdup in glove-box directly had been established through optimization design by Monte-Carlo simulation. The subsequent debugging for the electronics of this system ensured the system staying in a good operation state. The carried out experimental measurements had defined a series of parameters for the system, including the optimal operation voltage, detection efficiency for neutrons, spatial efficiency distribution, and the relationship between sample mass and the counts. Finally, according to the on-site measurements, the RSD of the measurement system for the glove-box holdup was 0.2%, which indicates the excellent stability of this system.