05000382/FIN-2015001-04
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Finding | |
|---|---|
| Title | Inadequate Procedure for Tightening Thermal Overload Connections for Safety-Related Components |
| Description | A self-revealing, non-cited violation of Technical Specification 6.8.1.a and Regulatory Guide 1.33, Revision 2, Appendix A, was identified for the failure to perform maintenance that could affect the performance of safety-related equipment in accordance with written procedures, documented instructions, or drawings appropriate to the circumstances. Specifically, prior to December 17, 2014, the licensee used a procedure that contained insufficient detail for tightening a thermal overload connection that resulted in a loose connection on a motor starter and eventual trip of a wet cooling tower fan, resulting in the A train of ultimate heat sink being declared inoperable. The licensee entered this condition into their corrective action program as Condition Report CR-WF3-2014-04430. The corrective action taken to restore compliance was to add additional detail to the procedure to ensure thermal overload connections are verified secure after their mechanical connections are tightened. The inspectors determined that the performance deficiency was more than minor because it was associated with the equipment performance attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to ensure successful tightening of the thermal overload connections for the wet cooling tower fans adversely impacted the capability of the system to perform its function. The inspectors performed the initial significance determination using NRC Inspection Manual Chapter 0609, Attachment 4, Initial Characterization of Findings. The inspectors determined the finding was of very low safety significance (Green) because it affected one train for less than the allowed outage time. When the A train of ultimate heat sink was declared inoperable, the B train of ultimate heat sink was already inoperable for planned maintenance. As a result, the B train maintenance was unrelated to the performance deficiency. In addition, the finding did not affect the design or qualification of the system, did not represent the loss of a safety system or function, did not represent the loss of function of at least a single train for greater than its Technical Specification allowed outage time, and did not represent an actual loss of function of one or more non-Technical Specification trains of equipment. The inspectors concluded that the finding did not have a cross-cutting aspect because the most significant contributor to the performance deficiency occurred more than two years ago and did not reflect current licensee performance. |
| Site: | Waterford  |
|---|---|
| Report | IR 05000382/2015001 Section 4OA3 |
| Date counted | Mar 31, 2015 (2015Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | C Speer F Ramirez G Replogle J Dixon J O'Donnell L Carson N Greene P Hernandez R Lantz |
| Violation of: | Technical Specification - Procedures Technical Specification |
| INPO aspect | |
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Finding - Waterford - IR 05000382/2015001 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Waterford) @ 2015Q1
Self-Identified List (Waterford)
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