05000498/FIN-2017002-03
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Finding | |
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| Title | Failure To Establish Adequate Procedures To Ensure Emergency Diesel Generator Access Flood Panels Would Meet Their Safety Function |
| Description | Green . The inspectors identified a non -cited violation of 10 CFR 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, for the failure to provide adequate written instructions for performing preventative maintenance to ensure the emergency diesel generator building access flood panels remain capable of performing their safety function. Specifically, the preventative maintenance work order model number 61046 was not adequate to detect degraded seal conditions, which were revealed during the flooding event on March 17, 2017. This issue was entered into the licensees corrective action program as Condition Report 2017- 12897. The licensee assembled a panel of individuals who were familiar with the design, and individuals responsible for the maintenance of these access panels and is still considering options to prevent future leakage. The failure to provide adequate written instructions for performing preventative maintenance to ensure diesel generator building access flood panels remain capable of performing their safety function was a performance deficiency. Specifically, preventative maintenance work order model number 61046 was not adequate to detect degraded seal conditions, which were revealed during the flooding event on March 17, 2017. The performance deficiency is. 4 more than minor, and therefore a finding, because it is associated with the protection against external f actors attribute of the Mitigating Systems Cornerstone and adversely affected the cornerstone objective to ensure availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the failure to identify degrading flood barriers could result in emergency diesel generator inoperability or failure during a design basis flooding event. Using Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) For Findings At-Power, dated July 1, 2012, Exhibit 2, Mitigating System Screening Questions, the finding was determined to of very low safety significance (Green). Specifically, the finding was not a deficiency affecting the design or qualification of a mitigating structure, system, and component ; did not represent a loss of system and/or function; did not represent an actual loss of function of at least a single train for greater than its technical specification allowed outage time; and did not represent an actual loss of function of one or more than non- technical specification trains of equipment designated as high -risk significance for greater than 24 hours2.777778e-4 days <br />0.00667 hours <br />3.968254e-5 weeks <br />9.132e-6 months <br />. The inspectors determined that this finding did not have a cross- cutting aspect because the most significant contributor to the performance deficiency did not reflect current licensee performance. Specifically, the emergency diesel generator access panels had not allowed water intrusion due to flooding within the last 3 years and, therefore, the licensee did not have a recent opportunity to understand that the preventative maintenance work order instructions were inadequate. |
| Site: | South Texas  |
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| Report | IR 05000498/2017002 Section 4OA2 |
| Date counted | Jun 30, 2017 (2017Q2) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | A Sanchez N Hernandez I Anchando J Braisted W Cullum N Okonkwo C Smith |
| Violation of: | 10 CFR 50 Appendix B Criterion V |
| INPO aspect | |
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Finding - South Texas - IR 05000498/2017002 | |||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (South Texas) @ 2017Q2
Self-Identified List (South Texas)
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