05000483/FIN-2017007-03
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Finding | |
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Title | Inputs to Internal Flooding Calculations Not Translated into Procedures or Instructions |
Description | The team identified a Green, non-cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, which requires, in part, that measures shall be established to assure that the design basis is correctly translated into procedures and instructions. Specifically, prior to on August 4, 2017, the licensee had design calculations that assumed operator actions to mitigate internal flooding of certain areas within specified time durations. These time requirements for the design basis flooding calculations had not been translated into any procedures or instructions. In response to this issue, the licensee performed a preliminary evaluation and determined that operator actions to support the design calculation could be performed within the time required. The licensee has entered this issue into their corrective action program as Condition Report CR-201703981. The team determined that the failure to translate operator time requirements for mitigating design basis flooding of critical areas into procedures or instructions was a 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 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 confirm that design basis inputs had been translated into procedures or instructions. In accordance with NRC Inspection Manual Chapter 0609, Appendix A, 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; and did not result in the loss of one or more trains of nontechnical specification equipment. The team determined that this finding did not have a cross-cutting aspect because the most significant contributor did not reflect current licensee performance. |
Site: | Callaway ![]() |
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Report | IR 05000483/2017007 Section 1R21 |
Date counted | Sep 30, 2017 (2017Q3) |
Type: | NCV: Green |
cornerstone | Mitigating Systems |
Identified by: | NRC identified |
Inspection Procedure: | IP 71111.21M |
Inspectors (proximate) | I Anchando J Watkins A Palmer |
Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion III, Design Control |
INPO aspect | |
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Finding - Callaway - IR 05000483/2017007 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Callaway) @ 2017Q3
Self-Identified List (Callaway)
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