Evaluation of high-resolution gamma-ray methods for determination of solid plutonium holdup in high-throughput bulk-processing equipment.

摘要

The first field testing of high-resolution gamma-ray methods and current hardware and software technologies applied to measurements of solid plutonium holdup in high-throughput bulk-processing equipment has shown promising results. The gamma-ray assays agree reasonably with the quantities recovered from the cleanout of a continuous-feed rotary calciner. The limitations on these measurements are primarily the uncertainties in the equipment attenuation factors. Approaches to reduce these uncertainties and to correct for effects of deposit self-attenuation are discussed. The criteria for success in measurements of this type are reviewed, and the impact of anticipated holdup on the recommended startup procedures for new facilities is addressed. 4 refs., 9 figs., 4 tabs.