05000445/FIN-2016004-02
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Finding | |
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| Title | Failure to Scope the Containment Ventilation System in the Maintenance Rule Program |
| Description | Green. The inspectors identified a non-cited violation of 10 CFR 50.65(b)(2) associated with the licensees failure to scope the containment ventilation system into the maintenance rule program. Specifically, the containment ventilation system, a non-safety related system that is relied upon to mitigate accidents or transients and used in emergency operating procedures, was not included in the scope of the monitoring program specified in 10 CFR 50.65(a)(1). In response to this issue the licensee scoped the system in the plants maintenance rule monitoring program, and placed the equipment under 10 CFR 50.65(a)(1) monitoring requirements pending further review. The licensee entered this issue into the corrective action program as CR-2016-008491. The failure to monitor the performance and condition of a system that meets the maintenance rule scoping criteria of 10 CFR 50.65(b)(2) is the performance deficiency. The performance deficiency was more than minor, and therefore a finding, because it was associated with the equipment performance attribute of the Mitigating Systems cornerstone and affected the cornerstone objective to ensure availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Using Inspection Manual Chapter 0609, Attachment 04, Initial Characterization of Findings, dated July 1, 2012, and Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated October 7, 2016, Exhibit 2, Mitigating Systems Screening Questions, the inspectors determined the finding affected the Mitigating Systems cornerstone and was of very low safety significance (Green), because the finding did not represent a loss of system function and the system was not designated as high safety-significant in accordance with the licensees maintenance rule program. The finding has a human performance cross-cutting aspect associated with avoiding complacency, in that, the licensee failed to ensure that individuals recognized and planned for the possibility of mistakes and latent issues when re-evaluating the basis for excluding the system [H.12]. |
| Site: | Comanche Peak  |
|---|---|
| Report | IR 05000445/2016004 Section 1R12 |
| Date counted | Dec 31, 2016 (2016Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | E Simpson J Groom J Josey J Tapp K Clayton L Brandt R Kumana T Farina W Gardner |
| Violation of: | 10 CFR 50.65(b) |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Comanche Peak - IR 05000445/2016004 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Comanche Peak) @ 2016Q4
Self-Identified List (Comanche Peak)
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