05000528/FIN-2011004-01
From kanterella
Jump to navigation
Jump to search
Finding | |
|---|---|
| Title | Failure to Adequately Classify and Evaluate Conditions Adverse to Quality |
| Description | The inspectors identified a noncited violation of 10 CFR Part 50, Appendix B, Criteria V, Instructions, Procedures, and Drawings, for the licensees failure to follow station procedures and perform an adequate classification and evaluation of two conditions adverse to quality. One example involved the installation of an automatic voltage regulator card in Unit 2 emergency diesel generator train B that was potentially defective and had been previously reported under 10 CFR Part 21 Notification 1996-29. The second example involved inadequate design control of the control room essential filtration system outside air dampers that resulted in Unit 1 and Unit 3 operators declaring all trains of control room emergency filtration actuation system inoperable. In both examples, Procedure 01DP-0AP12, Palo Verde Action Request Processing, required cause evaluations to be performed, however the licensee mis-classified the issues and only required a review for extent of condition. The licensee entered the issue into the corrective action program as Palo Verde Action Request (PVAR) 3824036. The licensee revised their corrective action review process to add additional management oversight. The licensee also implemented immediate corrective actions to revise plant procedures to maintain the control room outside air dampers normally open and replaced the automatic voltage regulator card in Unit 2 emergency diesel generator train B. The inspectors concluded the failure of Arizona Public Service to follow station procedures and adequately classify and evaluate two conditions adverse to quality was a performance deficiency. The inspectors concluded that the issue was more than minor because if left uncorrected, the performance deficiency has the potential to lead to a more significant safety concern. Specifically, the failure of plant personnel to perform apparent cause evaluations, and implement corrective actions to minimize recurrence could result in future plant changes outside of the design basis or potentially defective components being installed in plant equipment. The finding affected the Barrier Integrity and Mitigating Systems Cornerstones. The inspectors evaluated the significance of the finding under the Significance Determination Process, as defined in Inspection Manual Chapter 0609.04, Phase I Initial Screening and Characterization of Findings, and concluded the finding was of very low safety significance (Green). The first example was Green because it: (1) is not a design or qualification issue; (2) did not represent an actual loss of safety function of the system or train; (3) did not result in the loss of one or more trains of non-technical specification equipment; and (4) did not screen as potentially risk significant due to a seismic, flooding, or severe weather initiating event. The second example was Green because it only represented a degradation of the radiological barrier function of the control room. The inspectors determined this finding has a crosscutting aspect in the area of human performance associated with the component of work practices because the licensee failed to provide adequate supervisory and management oversight of the condition report classification activities such that nuclear safety is supported |
| Site: | Palo Verde  |
|---|---|
| Report | IR 05000528/2011004 Section 1R12 |
| Date counted | Sep 30, 2011 (2011Q3) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.12 |
| Inspectors (proximate) | G Warnick J Bashore M Baquera M Brown R Lantz |
| CCA | H.2, Field Presence |
| INPO aspect | LA.2 |
| ' | |
Finding - Palo Verde - IR 05000528/2011004 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Finding List (Palo Verde) @ 2011Q3
Self-Identified List (Palo Verde)
| |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||