Year
1990
Abstract
DOE Order 5633.3 requires that the accountable nuclear material holdings be inventoried at bi-monthly, semi-annual and annual intervals. This paper will describe a sampling plan designed to bound the total inventory difference. It is used in conjunction with a computerized nuclear material accountability system. The computer executes a statistical algorithm for selecting inventory items for measurement and produces a report listing those items to be inventoried. Based on verification or confirmatory measurements of the inventoried items, the computer calculates the estimated total inventory difference and accepts or rejects a hypothesis of no inventory difference. If the hypothesis is not rejected, one concludes, with a specified level of confidence, that the total inventory difference is less than a specified threshold value. The computer maintains a permanent data base describing the inventory items sampled and the results of the statistical analysis.