05000528/FIN-2012005-02
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Finding | |
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| Title | Failure to Perform Pressure Testing of the Reactor Vessel Flange Leak-Off Lines |
| Description | Inspectors identified a non-cited violation of 10 CFR 50.55a(g)(4) involving the licensees failure to perform a system pressure test of the reactor vessel flange leak off-line of Units 1, 2, and 3 in accordance with the applicable edition of Section XI of the ASME Code. Contrary to the above, prior to October 10, 2012, the licensee failed to perform the required pressure test of the reactor vessel flange seal leak-off line for all three units. Specifically, the licensee failed to implement the ASME Code,Section XI, Class 2 requirements for pressure retaining components as provided by Article IWC-5220, System Leakage Test. The licensee entered the finding into their corrective action program as Palo Verde Action Request 4269674. The inspectors determined that the licensees failure to perform a pressure test of the reactor vessel flange leak-off line was a performance deficiency. The performance deficiency was more than minor because it is associated with the Barrier Integrity Cornerstone attribute of systems, structures and components and barrier performance, and adversely affects the cornerstone objective to provide a reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. Using Manual Chapter 0609, Attachment A, The Significant Determination Process (SDP) for Findings At-Power, the finding was determined to be of very low safety significance (Green) because the finding did not result in exceeding the reactor coolant system leak rate for a small loss-of-coolant accident, and did not affect other systems used to mitigate a loss-of-coolant accident resulting in a total loss of their function. This issue did not have a cross-cutting aspect associated with it because it is not indicative of current performance. |
| Site: | Palo Verde  |
|---|---|
| Report | IR 05000528/2012005 Section 1R08 |
| Date counted | Dec 31, 2012 (2012Q4) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.08 |
| Inspectors (proximate) | M Brown L Carson S Garchow D Allen J Reynoso M Young B Larson J Groom I Anchondo N Hernandez D You |
| INPO aspect | |
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Finding - Palo Verde - IR 05000528/2012005 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Palo Verde) @ 2012Q4
Self-Identified List (Palo Verde)
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