The NRC identified a finding for the licensees failure to translate the design requirements of the high pressure injection (
HPI) pump motor coolers into the procedure used to verify adequate flow from PSW, in accordance with the Duke Energy Carolinas Topical Report, Quality Assurance Program. Specifically, the licensee failed to incorporate the fouling factor assumed in Calculation OSC-2042,
HPI Pump Motor Upper Bearing Cooling Report, Rev. 8, into Procedure TT/1/A/05000/008, High Pressure Injection Motor Cooler Flow Test from PSW, Rev. 2. The licensee entered this issue into their corrective action program as
PIPs O-15-03608 and O-15-04544. The performance deficiency was more than minor because if left uncorrected, the performance deficiency had the potential to
lead to a more significant safety concern. Specifically, the low pressure
service water (
LPSW) and PSW flow test acceptance criteria could have been met without ensuring adequate heat transfer could be provided from the
HPI motor coolers to PSW. The inspectors determined the finding to be of very low safety significance (Green) because the finding was a deficiency affecting the design or qualification of a mitigating
SSC, and the
SSC maintained its operability or functionality. The inspectors determined the finding was indicative of present licensee performance and was associated with the cross-cutting aspect of teamwork within the human performance area. Specifically, the licensee failed to demonstrate a strong sense of collaboration and cooperation in connection with projects to ensure critical reviews were performed for the procedures used to test the
HPI motor coolers.
