05000456/FIN-2017008-03
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Finding | |
|---|---|
| Title | Failure to Properly Correct Errors in Design Analysis for Main Steam Line Break in Main Steam Tunnel |
| Description | The inspectors identified a finding of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion XVI, Corrective Action, when the licensee failed to promptly correct errors in the design analysis for a main steam line break in the main steam tunnel. As part of their immediate corrective actions, the licensee entered this issue into their CAP as A R 4075641 and completed an operability evaluation. The finding was determined to be more than minor because it was associated with the Mitigating Systems cornerstone attribute of Design Control and adversely affected the cornerstone objective of ensuring the availability, reliability, and capability of systems that respond to initiating events to prevent undesirable consequences (i.e., core damage). In accordance with IMC 0609, Significance Determination Process, Attachment 0609.04, Initial Characterization of Findings, and Appendix A, The Significance Determination Process for Findings At -Power, Exhibit 2, Mitigating Systems Screening Questions, the inspectors answered Yes to Question 1, If the finding is a deficiency affecting the design or qualification of a mitigating SSC, does the SSC maintain its operability or functionality? because the finding did not result in a loss of operability or functionality. Therefore, this finding was of very low safety significance. No cross -cutting aspect was assigned to this finding as it was not reflective of current performance. |
| Site: | Braidwood  |
|---|---|
| Report | IR 05000456/2017008 Section 4OA2 |
| Date counted | Dec 31, 2017 (2017Q4) |
| Type: | NCV: Green |
| cornerstone | Mitigating Systems |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | B Bartlett D Sargis E Duncan |
| Violation of: | 10 CFR 50 Appendix B Criterion XVI |
| INPO aspect | |
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Finding - Braidwood - IR 05000456/2017008 | |||||||||||||||||||||||||||||||||||||||||
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Finding List (Braidwood) @ 2017Q4
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