05000269/FIN-2010007-03
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Finding | |
|---|---|
| Title | SSF Reactor Coolant Makeup Subsystem Inoperable for Greater than Allowed by Technical Specifications |
| Description | A self-revealing apparent violation of Technical Specification 3.10.1 was identified when the Standby Shutdown Facility (SSF) Reactor Coolant Makeup (RCM) subsystem letdown line failed to pass the required flow. As a result, the SSF RCM subsystem was rendered inoperable for greater than the seven days allowed by technical specifications (TSs). This apparent violation has been entered into the corrective action program as PIPO-09-7536.The licensees failure to ensure the SSF RCM subsystem remained operable as required by TSs was a performance deficiency. The performance deficiency was determined to be more than minor because it was associated with the Mitigating Systems Cornerstone attribute of Equipment Performance and adversely impacted the cornerstone objective in that the letdown line could not perform its design function during an SSF event. This finding was preliminarily determined to be greater than very low safety significance. This finding does not present an immediate safety concern because the filters have been removed from the SSF RCM subsystem letdown lines on all three units. No cross-cutting aspect was identified because the most significant contributor to this finding was not indicative of current licensee performance. |
| Site: | Oconee  |
|---|---|
| Report | IR 05000269/2010007 Section 4OA5 |
| Date counted | Jun 30, 2010 (2010Q2) |
| Type: | Violation: Yellow |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | |
| Inspectors (proximate) | A Sabisch K Ellis L Wert W Rogersc Evansg Bowman J Bartley L Wert V Mccree W Rogers |
| INPO aspect | |
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Finding - Oconee - IR 05000269/2010007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Oconee) @ 2010Q2
Self-Identified List (Oconee)
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