05000272/FIN-2013002-05
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Finding | |
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| Title | Failure to Implement Feedwater Control Valve Corrective Actions |
| Description | A self-revealing finding was identified because PSEG did not implement timely and effective corrective actions to address feedwater control valve (FCV) positioner malfunctions that occurred between 2004 and 2012. The inspectors determined that minor malfunctions between 2007 and 2012 provided PSEG indication that the ability of FCVs to properly respond to plant transients remained adversely affected and that actions completed to date may not have been effective. As a result of PSEGs ineffective and untimely action, on November 25, 2012, Unit 2 tripped from 92 percent power due to a malfunction of FCV 24BF19. Planned corrective actions include replacing the FCV positioners with digital controllers during the next refueling outage at each unit. The performance deficiency was determined to be more than minor because it affected the equipment performance attribute of the Initiating Events cornerstone and affected the cornerstone objective to limit the likelihood of events that upset plant stability and challenge critical safety functions during shutdown as well as at power operations. Specifically, the failure of the FCV to reposition as demanded resulted in a low steam generator water level and subsequent plant trip. In accordance with IMC 0609.04 Initial Screening and Characterization, and Exhibit 1 of IMC 0609, Appendix A, The Significance Determination Process for Findings At-Power, issued June 19, 2012, the inspectors determined that this finding is of very low safety significance (Green) because the performance deficiency did not cause both a reactor trip and the loss of mitigation equipment relied upon to transition the plant from the onset of the trip to a stable shutdown condition. This finding has a crosscutting aspect in the area of Human Performance, Decision Making, because PSEG decisions did not demonstrate that nuclear safety was an overriding priority. Specifically, PSEG did not demonstrate conservative assumptions in decision making by postponing corrective actions to prevent recurrence over an eight year time span, despite numerous issues with the feedwater regulating valves that culminated in the plant tripping. |
| Site: | Salem  |
|---|---|
| Report | IR 05000272/2013002 Section 4OA3 |
| Date counted | Mar 31, 2013 (2013Q1) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | S Barr G Dentel J Laughlin R Rolph E Burket P Mckenna E Bonney |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Salem - IR 05000272/2013002 | |||||||||||||||||||||||||||||||||||||
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Finding List (Salem) @ 2013Q1
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