Resolving inventory differences

Conference · Tue Dec 31 04:00:00 EST 1991

OSTI ID:10133012

Weber, J H; Clark, J P

Determining the cause of an inventory difference (ID) that exceeds warning or alarm limits should not only involve investigation into measurement methods and reexamination of the model assumptions used in the calculation of the limits, but also result in corrective actions that improve the quality of the accountability measurements. An example illustrating methods used by Savannah River Site (SRS) personnel to resolve an ID is presented that may be useful to other facilities faced with a similar problem. After first determining that no theft or diversion of material occurred and correcting any accountability calculation errors, investigation into the IDs focused on volume and analytical measurements, limit of error of inventory difference (LEID) modeling assumptions, and changes in the measurement procedures and methods prior to the alarm. There had been a gradual gain trend in IDs prior to the alarm which was reversed by the alarm inventory. The majority of the NM in the facility was stored in four large tanks which helped identify causes for the alarm. The investigation, while indicating no diversion or theft, resulted in changes in the analytical method and in improvements in the measurement and accountability that produced a 67% improvement in the LEID.

• Research Organization: Westinghouse Savannah River Co., Aiken, SC (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC09-89SR18035
• OSTI ID: 10133012
• Report Number(s): WSRC-MS--91-058; CONF-910774--97; ON: DE92009863
• Country of Publication: United States
• Language: English

Related Subjects

055000
98 NUCLEAR DISARMAMENT, SAFEGUARDS, AND PHYSICAL PROTECTION
INVENTORIES
INVESTIGATIONS
NUCLEAR MATERIALS MANAGEMENT
SAFEGUARDS, INSPECTION, AND ACCOUNTABILITY
SAVANNAH RIVER PLANT
STORAGE FACILITIES