The NRC identified a Green non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to perform an adequate test to verify that anticipated water hammer forces would not exceed design limitations at high points in the essential raw cooling water piping associated with the upper containment coolers (UCC). This issue was entered into the licensees corrective action program as problem evaluation report 981278 and an operability determination was performed that provided reasonable assurance of operability while corrective actions are being evaluated. The licensees failure to perform an adequate test to verify that anticipated water hammer forces would not exceed design limitations at high points in the essential raw cooling water piping associated with the UCCs was determined to be a performance deficiency. The team determined that the performance deficiency was more than minor because it affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The team 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 structure, system, or component (SSC), and the SSC maintained its operability. The team determined that no cross-cutting aspect was applicable because the finding was not indicative of current licensee performance.
Failure To Perform An Adequate Water Hammer Test
05000390/FIN-2015007-01
IR 05000390/2015007
≤31 March 2015 ≥31 March 2015
≤1 July 2014 ≥1 July 2014
~IR 05000390/2015000
~IR 05000390/2015001
~IR 05000390/2015002
~IR 05000390/2015003
~IR 05000390/2015004
~IR 05000390/2015005
~IR 05000390/2015007
~IR 05000390/2015009
~IR 05000390/2015010
~IR 05000390/2015301
~IR 05000390/2015403
~IR 05000390/2015404
~IR 05000390/2015405
~IR 05000390/2015406
~IR 05000390/2015407
~IR 05000390/2015408
~IR 05000390/2015410
~IR 05000390/2015502
~IR 05000390/2015602
~IR 05000390/2015603
~IR 05000390/2015604
~IR 05000390/2015605
~IR 05000390/2015608
~IR 05000390/2015609
~IR 05000390/2015610
~IR 05000390/2015611
~IR 05000390/2015613
~IR 05000390/2015614
~IR 05000390/2015615
~IR 05000390/2015616
~IR 05000391/2015601
~IR 05000391/2015602
~IR 05000391/2015603
~IR 05000391/2015604
~IR 05000391/2015605
~IR 05000391/2015606
~IR 05000391/2015607
~IR 05000391/2015609
~IR 05000391/2015610
~IR 05000391/2015611
~IR 05000391/2015613
Watts Bar 2015
!Licensee-identified ≥1 July 2014 Watts Bar ≤31 March 2015 23:59:59
Licensee-identified ≥1 July 2014 Watts Bar ≤31 March 2015 23:59:59
Watts Bar