For the D5
DG crankcase pressure issue, the inspectors noted that this had been a longstanding problem with the D5 and D6
DGs. Licensee corrective actions may have been inadequate and/or not completed in a timely manner, resulting in unnecessary increased unavailability of the
DGs. The licensee was performing a root cause evaluation of the high crankcase pressure problem technical issues, but it was not complete at the end of this inspection period. The licensee did complete a root cause evaluation of the management and organizational issues leading to the potential inadequate corrective actions. That evaluation indicated that there were wide-ranging organizational, management, leadership, and cultural issues contributing to the problem. Thus there may have been performance deficiencies which resulted in a violation of
10 CFR 50, Appendix B, Criterion XVI, Corrective Action. This issue was considered a
URI pending the inspectors review of the technical root cause report. The inspectors review will determine whether failure to take adequate and timely corrective actions led to unnecessary
DG unavailability and whether that unavailability resulted in a more than minor increase in risk. (
URI 05000306/2007005-02)
