05000261/FIN-2012002-03
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Finding | |
|---|---|
| Title | LOW Temperature Overpressure System Rendered Inoperable for Operational Convenience |
| Description | The inspectors identified a Green finding for failure to follow the TS bases associated with Improved Technical Specification (ITS) 3.0.2 Limiting Condition for Operability (LCO) Applicability. Specifically, the licensee rendered the Low Temperature Overpressure Protection System (LTOP) inoperable and entered ITS 3.4.12 Condition G for operational convenience. On March 11, 2012, for approximately 90 minutes, while transitioning the Low Temperature Overpressure System from ITS LCO 3.4.12 b. to ITS LCO 3.4.12 a., the LTOP system was rendered inoperable. This issue has been entered in the corrective action program as NCR 523648. Corrective actions are being evaluated. Rendering the LTOP system inoperable for operational convenience was a performance deficiency. The finding was more than minor because it impacted the Equipment Performance attribute of the Barrier Integrity Cornerstone, and adversely affected the cornerstone objective to provide reasonable assurance that the physical design barriers of the reactor coolant system protect the public from radionuclide releases caused by accidents or events. Specifically, with an inoperable LTOP system the RCS protection from an overpressure event is reduced. The significance of this finding was assessed using Inspection Manual Chapter 0609 Shutdown Significance Determination Process Appendix G. The inspectors determined that the finding was of very low safety significance (Green) and it did not adversely impact the five guidelines contained in Checklist 4 of core heat removal, inventory control, power availability, containment closure, or reactivity. No cross-cutting aspect is associated with this finding as the performance deficiency does not reflect current licensee performance in that licensee has utilized this process for years. |
| Site: | Robinson  |
|---|---|
| Report | IR 05000261/2012002 Section 1R20 |
| Date counted | Mar 31, 2012 (2012Q1) |
| Type: | Finding: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.2 |
| Inspectors (proximate) | A Nielsen R Hamilton L Lake J Hickey R Musser P Lessard C Scott J Rivera A Sengupta W Pursley |
| INPO aspect | |
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Finding - Robinson - IR 05000261/2012002 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Robinson) @ 2012Q1
Self-Identified List (Robinson)
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