05000461/FIN-2017002-02
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Finding | |
|---|---|
| Title | Failure to Perform Adequate Evaluation of Crane Rail Clips |
| Description | Green . The inspectors identified a finding of very -low safety significance and an associated cited violation of 10 CFR Part 50, Appendix B, Criterion III, Design Control, for the failure to properly verify the adequacy of design of the fuel building crane and crane support structure elements. Specifically, calculations involving the crane rail clips and clip bolts had multiple technical errors and failed to adequately demonstrate that the design met the design basis requirements. The licensee initiated corrective actions by documenting the deficiency in A R 4001089 and performed an evaluation demonstrating that the functionality of the crane was maintained. The finding was determined to be more -than -minor because it was associated with the design control attribute of the Barrier Integrity cornerstone and adversely affected the cornerstone objective of maintaining the functionality of the spent fuel pool (SFP) cooling system. Specifically, crane rail clip bolts were required to ensure structural integrity of structures, systems, and components described in the Updated Safety Analysis Report, 5 when subjected to design loads as part of safe load handling of heavy loads near the SFP and to ensure integrity of the spent fuel cask. In accordance with IMC 0609, Significance Determination Process , Attachment 0609.04, Initial Characterization of Findings, Table 2, the inspectors determined the finding affected the Barrier Integrity cornerstone because it was associated with SFP/fuel handling activities . Based on answering No to questions A through F in Table 3, the inspectors determined the finding could be evaluated using Appendix A, The Significance Determination Process for Findings At -Power, Exhibit 3, for the Barrier Integrity cornerstone screening questions. Based on the crane remaining functional, the inspectors answered No to Questions D.1 through D.4 because the finding did not adversely affect decay heat removal capabilities, did not result from fuel handling errors, did not result in loss of SFP inventory, and did not affect the SFP neutron absorber or fuel bundle misplacement ; therefore , the finding screened as having very -low safety significance. The finding was cross- cutting in the resolution aspect of the problem identification and resolution area because the licensee failed to take effective corrective actions in a timely manner to address issues identified earlier in the rail clip evaluations. [P.3] |
| Site: | Clinton  |
|---|---|
| Report | IR 05000461/2017002 Section 1R18 |
| Date counted | Jun 30, 2017 (2017Q2) |
| Type: | Violation: Green |
| cornerstone | Barrier Integrity |
| Identified by: | NRC identified |
| Inspection Procedure: | IP 71111.18 |
| Inspectors (proximate) | W Schaup E Sanchez-Santiago M Doyle S Bell G Edwards V Meghani L Torres S Mischke K Stoedter |
| Violation of: | 10 CFR 50 Appendix B 10 CFR 50 Appendix B Criterion III, Design Control |
| CCA | P.3, Resolution |
| INPO aspect | PI.3 |
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Finding - Clinton - IR 05000461/2017002 | |||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Clinton) @ 2017Q2
Self-Identified List (Clinton)
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