DEVELOPING A STRATEGY FOR LICENSEE INVESTIGATION OF AN EXCESSIVE INVENTORY DIFFERENCE*

A strategy for investigating an excessive inventory difference (ID) is described. Possible sources of error are discussed in terms of expected effect on ID and ease of investigation. A priority is assigned to each possible source of error and an investigation plan is developed based on timeliness of resolution to minimize plant down time. The plan is divided into three sections to provide for assessment of investigation activities. The three sections correspond to the time interval prior to notification of the Nuclear Regulatory Commission (NRC), prior to the response of the NRC, and under the direction of the NRC.