05000277/FIN-2012003-02
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Finding | |
|---|---|
| Title | Licensee-Identified Violation |
| Description | TS LCO 3.3.5.1, Condition E, requires that one inoperable channel of CS system bypass valve instrumentation be restored to operable in seven days, and, if the redundant emergency core cooling system initiation capability is inoperable, the supported feature(s) must be declared inoperable within one hour. Additionally, TS LCO 3.5.1, Condition I, requires that with two CS subsystems inoperable, LCO 3.0.3 be entered immediately. Contrary to the above, the A and D CS pump bypass valve instrumentation were both inoperable on April 18, 2012, for a period of time greater than one hour, the supported features were not declared inoperable, and LCO 3.0.3 was not immediately entered. Specifically, following discovery of the A CS pump bypass instrument inoperability during ST on April 18, 2012, the D CS pump bypass instrument was discovered to be inoperable on April 19, 2012. PBAPS determined that it was likely that the D CS instrument was also inoperable April 18, 2012, and therefore this event was reportable (see section 4OA3.3). Following successful recalibration, both switches were returned to an operable status on the day of their respective surveillance testing. The inspectors determined that this event screens to Green using the Table 4a screening criteria in Attachment 4 of IMC 0609, SDP, because there was no loss of the CS system safety function. Because this finding is of very low safety significance, and has been entered into Exelon\'s CAP under IR 1355773, this violation is being treated as a Green NCV consistent with the NRCs Enforcement Policy. |
| Site: | Peach Bottom  |
|---|---|
| Report | IR 05000277/2012003 Section 4OA7 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Licensee-identified |
| Inspection Procedure: | |
| Inspectors (proximate) | A Rao A Rosebrook A Ziedonis D Roberts J Caruso J Furia J Laughlin P Presby S Barr S Hansell T Hedigan |
| INPO aspect | |
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Finding - Peach Bottom - IR 05000277/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Peach Bottom) @ 2012Q2
Self-Identified List (Peach Bottom)
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