05000298/FIN-2012004-02
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Finding | |
|---|---|
| Title | Failure to Demonstrate that Emergency Diesel Generators can Perform Multiple Air Starts from a Single Air Receiver |
| Description | The inspectors identified a cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the licensees failure to assure that the applicable design basis for applicable structures, systems, and components were correctly translated into specifications, procedures, and instructions. As described in UFSAR Section 5.3.3, a part of the design basis for a component to which this appendix applies is for each emergency diesel generator starting air receiver to be capable of providing sufficient air to perform multiple starts without immediate replenishment, and measures established by the licensee failed to assure that that part of the design bases was correctly translated into test procedures to verify that each emergency diesel generator starting air receiver is capable of providing sufficient air to perform multiple starts without immediate replenishment. The violation is cited because the licensee failed to restore compliance in a reasonable time following documentation of the issue as a non-cited violation in NRC Inspection Report 05000298/2010007, issued December 3, 2010 (ML103370640). The licensee entered this deficiency into their corrective action program for resolution as Condition Report CR-CNS-2012-05837. The licensees failure to ensure that the plant design bases were correctly translated into test procedures was a performance deficiency. This performance deficiency was determined to be more than minor and is therefore a finding because it was associated with the design control attribute of the Mitigating Systems Cornerstone, in that the licensees failure to appropriately analyze or test the multiple-start capability of a single air receiver affected the associated objective to ensure availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. The inspectors evaluated the finding using Inspection Manual Chapter 0609, Appendix A, Initial Screening and Characterization of Findings. The inspectors determined that the finding is of very low safety significance (Green) because the finding: (1) was not a deficiency affecting the design or qualification of a mitigating structure, system or component, and did not result in a loss of operability or functionality; (2) did not represent a loss of system and/or function; (3) did not represent an actual loss of function of at least a single train for longer than its technical specification allowed outage time, or two separate safety systems out-of-service for longer than its technical specification allowed outage time; and (4) did not represent an actual loss of function of one or more non-technical specification trains of equipment designated as high safety-significance in accordance with the licensees maintenance rule program. Since operators used non-conservative decisions when they evaluated the stations licensing basis when isolating and depressurizing air receiver 1B for emergency diesel generator 1, the finding has a cross-cutting aspect in the area of human performance associated with the decision making component because the licensee failed to use conservative assumptions in decision making and adopt a requirement to demonstrate that the proposed action is safe in order to proceed rather than a requirement to demonstrate it is unsafe in order to disapprove the action. |
| Site: | Cooper |
|---|---|
| Report | IR 05000298/2012004 Section 1R11 |
| Date counted | Sep 30, 2012 (2012Q3) |
| Type: | Violation: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.11 |
| Inspectors (proximate) | J Josey J Laughlin P Elkmann R Hagar A Fairbanks C Henderson G Guerrac Hendersond Allen J Josey J Laughlin J O'Donnell L Ricketson P Elkmann |
| CCA | H.14, Conservative Bias |
| INPO aspect | DM.2 |
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Finding - Cooper - IR 05000298/2012004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Cooper) @ 2012Q3
Self-Identified List (Cooper)
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