05000336/FIN-2009005-04: Difference between revisions
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| CCA = P.3 | | CCA = P.3 | ||
| INPO aspect = PI.3 | | INPO aspect = PI.3 | ||
| description = A Green, self-revealing finding (FIN) was identified for Dominion's failure to complete effective corrective actions for known degraded conditions associated with theVR-11 and VR-21 120-volt AC non-vital instrument power supplies. This condition led to a loss of annunciators and declaration of a Notification of Unusual Event (NOUE) on November 15, 2009. Dominion took immediate action to expedite the installation of an uninterruptible power supply (UPS) for VR-11 and VR-21.This finding was more than minor because it was associated with the Procedure Quality attribute of the Mitigating Systems cornerstone and affected the cornerstone objective of ensuring capability of systems that respond to initiating events to prevent undesirable consequences. The finding was determined to be of very low safety significance(Green) because the finding did not involve a design or qualification deficiency resulting in loss of operability or functionality, did not result in a loss of system safety function, and did not screen as potentially risk significant due to external initiating events. No violation of regulatory requirements occurred, because the annunciator system is non-safety related. This finding had a cross-cutting aspect in the Problem Identification and Resolution cross-cutting area, Corrective Action Program component, because Dominion did not take appropriate corrective actions to address safety issues and adverse trends in a timely manner, commensurate with their safety significance and complexity. P.1(d | | description = A Green, self-revealing finding (FIN) was identified for Dominion\'s failure to complete effective corrective actions for known degraded conditions associated with theVR-11 and VR-21 120-volt AC non-vital instrument power supplies. This condition led to a loss of annunciators and declaration of a Notification of Unusual Event (NOUE) on November 15, 2009. Dominion took immediate action to expedite the installation of an uninterruptible power supply (UPS) for VR-11 and VR-21.This finding was more than minor because it was associated with the Procedure Quality attribute of the Mitigating Systems cornerstone and affected the cornerstone objective of ensuring capability of systems that respond to initiating events to prevent undesirable consequences. The finding was determined to be of very low safety significance(Green) because the finding did not involve a design or qualification deficiency resulting in loss of operability or functionality, did not result in a loss of system safety function, and did not screen as potentially risk significant due to external initiating events. No violation of regulatory requirements occurred, because the annunciator system is non-safety related. This finding had a cross-cutting aspect in the Problem Identification and Resolution cross-cutting area, Corrective Action Program component, because Dominion did not take appropriate corrective actions to address safety issues and adverse trends in a timely manner, commensurate with their safety significance and complexity. P.1(d | ||
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Latest revision as of 19:38, 20 February 2018
| Site: | Millstone  |
|---|---|
| Report | IR 05000336/2009005 Section 4OA3 |
| Date counted | Dec 31, 2009 (2009Q4) |
| Type: | Finding: Green |
| cornerstone | Mitigating Systems |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71153 |
| Inspectors (proximate) | T Moslak D Silk G Johnson D Jackson M Modes B Haagensen J Krafty S Shaffer |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
| ' | |