Abstract
Methods are being investigated to improve neutron dosimety at Los Alamos National Laboratory (LANL) using the etched track dosemeter CR-39. Specifically, use of CR-39 for dynamic environments, typically encountered at the LANL Plutonium Facility, is shown to be a superior method for personnel neutron dosimetry when compared to the currently used TLD system. The results of glovebox experiments simulating hydrogenous shielding used at LANL, temporal variations of neutron correction factors used at the Plutonium Facility, trial implementation at this facility and preliminary neutron spectroscopy measurements are presented and compared to reference dosimetry measurements. The results confirm that use of a TLD system in a facility implementing hydrogenous shielding requires frequent field recalibration. When such correction factors are not re-evaluated frequently, or are maintained at pre-shielding levels, significant (i.e. 2- to 3-fold) overestimation of the neutron dose equivalent can occur.
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