05000244/FIN-2008010-01
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Finding | |
|---|---|
| Title | Untimely Corrective Actions Associated With the \"C\" Instrument Air Compressor. |
| Description | The inspectors identified a finding of very low safety significance for Constellations failure to take timely corrective actions to address repetitive failures of the C instrument air compressor (IAC). The C IAC had a history of tripping on high blow-off pressure since 2000 including at least 5 trips since May 2006. Ginna determined that the cause of the trips was due to back leakage through the IAC discharge check valve and/or master control panel design deficiencies. Although a design upgrade was considered several times since 2002, each upgrade of the C IAC was subsequently cancelled. Following the latest trip on September 9, 2008, Ginna declared the C IAC inoperable until the completion of the master controller upgrade later this year. Ginna entered this issue into their CAP for resolution. The finding is more than minor because it is associated with the equipment performance attribute of the Initiating Events cornerstone and affects the cornerstone objective of limiting the likelihood of events that upset plant stability and challenge critical safety functions during power operations. Specifically, unnecessary transients on the instrument air header increased the likelihood of a loss of instrument air. A loss of instrument air would cause the main steam isolation valves to close and result in a reactor trip. The inspectors determined that the finding was of very low safety significance because the finding did not contribute to the likelihood of a primary or secondary system loss of coolant accident initiator, contribute to both the likelihood of a reactor trip and the likelihood that mitigating equipment would not be available, or increase the likelihood of a fire or internal/external flood. This finding has a crosscutting aspect in the area of problem identification and resolution in that Ginna did not periodically trend and assess information associated with the C IAC trips to identify programmatic and common cause problems. (P.1(b)) (Section 4OA2.a.3.i) |
| Site: | Ginna  |
|---|---|
| Report | IR 05000244/2008010 Section 4OA2 |
| Date counted | Sep 30, 2008 (2008Q3) |
| Type: | Finding: Green |
| cornerstone | Initiating Events |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Klett M Marshfield J Ayala |
| CCA | P.4, Trending |
| INPO aspect | PI.4 |
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Finding - Ginna - IR 05000244/2008010 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Ginna) @ 2008Q3
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