05000416/FIN-2016007-05
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Finding | |
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Title | Failure to Establish Adequate Procedures for Building Sandbag Barriers |
Description | The team identified a Green, non-cited violation of Technical Specification 5.4.1(a), Procedures, for failure to establish adequate procedures for severe weather operations. Specifically, the licensee failed to establish adequate severe weather procedures to ensure the control building, diesel building, and standby service water pump houses would be adequately protected from flooding. The failure to establish adequate procedures for severe weather operations to ensure compliance with Technical Specification 5.4.1(a), Procedures, and with the Regulatory Guide 1.33, Appendix A, Section 6.w, Acts of Nature, was a performance deficiency. In response to this issue, the licensee calculated the maximum allowable leakage of the sandbag barriers that would adequately protect any structure, system, or components important to safety from flooding. Additionally, the licensee performed a mock-up of the sandbag barriers and determined that the expected leakage through the sandbag barriers during a probable maximum precipitation event would be less than the maximum leakage allowed by the calculation. This finding was entered into the licensees corrective action program as Condition Reports CR-GGN-2016-08294 and CR-GGN-1-2016-08912. This performance deficiency was more-than-minor because it was associated with the protection against external factors attribute of the Mitigating Systems Cornerstone, and adversely affected the cornerstone objective to ensure the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences. Specifically, the licensee failed to establish adequate procedures to ensure the sandbag barriers offer adequate flood protection during a probable maximum precipitation event that no structures, systems, or components important to safety are affected. In accordance with Inspection Manual Chapter 0609, Appendix A, The Significance Determination Process (SDP) for Findings At-Power, dated June 19, 2012, Exhibit 2, Mitigating Systems Screening Questions, the issue screened as having very low safety significance (Green) because it was a design or qualification deficiency that did not represent a loss of operability or functionality; did not represent an actual loss of safety function of the system or train; did not result in the loss of one or more trains of nontechnical specification equipment; and did not screen as potentially risk significant due to seismic, flooding, or severe weather. The team determined the finding had a crosscutting aspect of Avoiding Complacency within the area of Human Performance because the licensee failed to recognize and plan for the possibility of mistakes, latent issues, and inherent risk in building the sandbag barriers, even while expecting successful outcomes [H.12]. |
Site: | Grand Gulf |
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Report | IR 05000416/2016007 Section 1R17 |
Date counted | Dec 31, 2016 (2016Q4) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.17 |
Inspectors (proximate) | C Smith C Stott J Watkins T Farnholtz |
Violation of: | Technical Specification Technical Specification - Procedures |
CCA | H.12, Avoid Complacency |
INPO aspect | QA.4 |
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Finding - Grand Gulf - IR 05000416/2016007 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Grand Gulf) @ 2016Q4
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