Year
1989
Abstract
Obtaining maximum value from near-real-time Baterials accountancy for reprocessing requires that some (non-zero) value be assigned to the plutonius inventory in solvent extraction system contactors. A spectrum of possibilities has been studied, including (a) a constant value based on nominal throughput, (b) several empirical least squares models, and (c) several levels of sisplified equations derived from chemical principles. All models studied satisfy a fundamental constraint that nc operating data be used which would not otherwise be available to safeguards inspectors. The various models are discussed in terms of expected accuracy and projected effect on the detection sensitivity of near-real-time materials accountancy, It is shown that the best sodeis currently available will still have a small but non-zero effect on material balance uncertainty.