APPLICATIONS OF A MATERIAL ACCOUNTING MODEL

A material accounting model has been developed. This paper describes applications of that model to NRC licensed operating facilities. The model has been used to examine the variation in the facility calculated LEID values, to investigate the impact of alternate measurement control programs on LEID performance, and to estimate the contributions of variables, external to the measurement system to the variation of observed ID values. Results of an application of the model to a specific facility are in excellent agreement with historical reported LEID and ID facility performance. This model is potentially useful in understanding the causal mechanisms underlying historical ID performance, identifying areas for material control improvement, and addressing the need and expected benefit from specific license conditions.