05000266/FIN-2014002-03
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Finding | |
|---|---|
| Title | Failure to Perform Flood Reviews of Material That Could Affect Flood Relief Paths |
| Description | The inspectors identified a Green non-cited violation of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the failure to follow procedures. Specifically, the licensee failed to perform a flood review, as required by NP 8.4.17, PBNP Flooding Barrier / Relief Path Program, Revision 15, when work activities in the G02 EDG room left a lightweight wet floor safety sign that could have been transported during a license basis internal flood event and affected the flow capacity of the flood relief slots. The licensees short-term corrective actions included removing the material from the G02 EDG room and communicating to station personnel the importance of not leaving susceptible material unattended. The licensee entered this issue into their CAP as AR 01960472. The inspectors determined that the finding was more than minor, because, if left uncorrected, it could have the potential to become a more significant safety concern. Specifically, if the licensee was not performing flood reviews for material left unattended during or after work activities, susceptible unattended material could be transported to credited flood relief dampers and impeded the design flow rate required for the dampers to protect safety related equipment. The inspectors determined the finding could be evaluated using the SDP in accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, dated June 19, 2012, and Appendix A, The Significance Determination Process for Findings At-Power, Exhibit 4, External Events Screening Questions, dated June 19, 2012. The inspectors answered yes to question 1 of External Events screening questions since the finding could potentially degrade one train of the emergency power system (a risk-significant system). Thus the inspectors consulted the regional Senior Risk Analyst (SRA). The SRA performed a detailed risk evaluation using the Point Beach Standardized Plant Analysis Risk Model Version 8.22. For there to be a risk increase due to this deficiency there would have to be a LOOP coincident with a flood event that renders the GO2 EDG unavailable. The SRA performed a bounding analysis assuming that the flood event occurred coincident with a LOOP. The exposure time for the deficient condition was not more than 15-days. Assuming a 15-day exposure time, the delta CDF was 9.3E-08/yr. The dominant sequence involved a transient initiating event with a consequential LOOP and station blackout. Based on the result of the detailed risk evaluation, the issue was of very low risk significance (Green). This finding has a cross-cutting aspect of Training (H.9) in the area of human performance, for failing to provide training and ensure knowledge transfer to maintain a knowledgeable workforce. Specifically, the licensee did not ensure that personnel were knowledgeable of need to control material that could transport during an internal flooding event, restrict flood relief paths, and affect flood mitigation features. |
| Site: | Point Beach  |
|---|---|
| Report | IR 05000266/2014002 Section 1R15 |
| Date counted | Mar 31, 2014 (2014Q1) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.15 |
| Inspectors (proximate) | B Bartlett J Cameron K Barclay R Elliott T Bilik V Myers |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| CCA | , |
| INPO aspect | CL.4, CL.4, CL.4 |
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Finding - Point Beach - IR 05000266/2014002 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Point Beach) @ 2014Q1
Self-Identified List (Point Beach)
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