05000461/FIN-2011002-02
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Finding | |
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Title | Failure to Meet Surveillance Testing Requirement for Hydrogen Igniters in Accessible Areas of the Primary Containment and Drywell |
Description | The inspectors identified a finding of very low safety significance with an associated non-cited violation of Technical Specification Surveillance Requirement (TSSR) 3.6.3.2.4. The licensee failed to verify that each required hydrogen igniter in accessible areas of the Primary Containment and Drywell develops a surface temperature of Y 1700 degrees Fahrenheit (aF) every 24 months. The licensee performed a risk assessment of the missed surveillance in accordance with TSSR 3.0.3, which determined that completion of the surveillance could be delayed up to the 24-month surveillance interval without a significant increase in plant risk. The licensee also completed an operability evaluation for the TS nonconformance and concluded that there was reasonable assurance that the affected hydrogen igniters were operable based on the results of surveillance testing to measure voltage/current draw. The finding was of more than minor significance because it was associated with the Human Performance attribute for the Containment and adversely affected the Barrier Integrity Cornerstone objective to provide reasonable assurance that physical design barriers protect the public from radionuclide releases caused by accidents or events. Specifically, the licensee did not correctly evaluate a change to perform the surveillance test with the unit at power beginning in March 2002. It was not recognized that TSSR 3.6.3.2.4 would not be met for accessible hydrogen igniters in the Drywell and 755 Elevation Steam Tunnel when performing the test with the unit at power and the licensee incorrectly believed that performance of the current/voltage surveillance test procedure for inaccessible igniters was an appropriate substitute, contrary to existing procedural guidance. The finding was a licensee performance deficiency of very low safety significance because it did not involve an actual reduction in the function of hydrogen igniters in the Primary Containment and Drywell. The inspectors concluded that because the scheduling change to perform the surveillance with the unit at power took place prior to surveillance testing beginning in March 2002, it did not necessarily reflect current licensee performance and no cross-cutting aspect was identified. |
Site: | Clinton |
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Report | IR 05000461/2011002 Section 1R22 |
Date counted | Mar 31, 2011 (2011Q1) |
Type: | NCV: Green |
cornerstone | Initiating Events, Barrier Integrity |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.22 |
Inspectors (proximate) | R Orlikowski J Cassidy B Kemker C Brown S Mischke D Lords S West |
INPO aspect | |
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Finding - Clinton - IR 05000461/2011002 | |||||||||||||||||||||||||||||||||||||||||||
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Finding List (Clinton) @ 2011Q1
Self-Identified List (Clinton)
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