05000454/FIN-2012003-02
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Finding | |
|---|---|
| Title | Failure to Have Instructions Appropriate to the Circumstances |
| Description | A self-revealed finding with two examples of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified when licensee personnel failed to properly torque a RCS pressure boundary valve closed and failed to properly re-install a Reactor Containment Fan Cooler (RCFC) interior access panel during the previous Unit 1 refueling outage. The licensee replaced the valve and reinstalled the RCFC internal access panel upon identification and entered the item into the CAP as IR 1339375 and IR 1347450, respectively. Additional corrective actions included modifying the installation procedure to add clarity in the selection of the proper torque value and to add detail and tracking aids for the RCFC interior access panels. In accordance with IMC 0612, Appendix B, Issue Screening, the first example was determined to be more than minor because it was associated with the Procedure Quality attribute of the Initiating Events Cornerstone and adversely affected the cornerstone objective of limiting the likelihood of those events that upset plant stability and challenge critical safety functions during shutdown as well as power operations. Specifically, this issue increased the risk of a small break loss of coolant accident. The inspectors performed a Phase 1 SDP screening using IMC 0609, Attachment 4, Table 4a, Characterization Worksheet for Initiating Events Cornerstone. The inspectors determined that the finding would not result in exceeding the TS limit for any RCS leakage or could have likely affected other mitigation systems resulting in a total loss of their safety function. . A self-revealed finding with two examples of very low safety significance and an associated NCV of 10 CFR Part 50, Appendix B, Criterion V, Instructions, Procedures, and Drawings, was identified when licensee personnel failed to properly torque a RCS pressure boundary valve closed and failed to properly re-install a Reactor Containment Fan Cooler (RCFC) interior access panel during the previous Unit 1 refueling outage. The licensee replaced the valve and reinstalled the RCFC internal access panel upon identification and entered the item into the CAP as IR 1339375 and IR 1347450, respectively. Additional corrective actions included modifying the installation procedure to add clarity in the selection of the proper torque value and to add detail and tracking aids for the RCFC interior access panels. The second example was determined to be more than minor because it was associated with the Configuration Control attribute of the Barrier Integrity Cornerstone and adversely affected the cornerstone objective of providing reasonable assurance that physical design barriers, including the containment, protect the public from radionuclide releases caused by accidents and events. Specifically, this issue decreased the availability and reliability of the RCFCs for use during a design basis accident. The inspectors determined that the issue was of very low safety significance (Green) because the finding did not represent a degradation of the radiological barrier function, did not represent a degradation of the barrier function of the control room, did not represent an actual open pathway in the physical integrity of reactor containment, and did not involve an actual reduction in function of hydrogen igniters in the reactor containment. Both examples had a cross-cutting aspect in the Work Practices component of the Human Performance cross-cutting area H.4(a) because licensee personnel failed to properly utilize human error prevention techniques. These two examples of the finding with a cross-cutting aspect were considered as a single NCV. |
| Site: | Byron  |
|---|---|
| Report | IR 05000454/2012003 Section 4OA2 |
| Date counted | Jun 30, 2012 (2012Q2) |
| Type: | NCV: Green |
| cornerstone | Barrier Integrity |
| Identified by: | Self-revealing |
| Inspection Procedure: | IP 71152 |
| Inspectors (proximate) | J Tapp E Duncan J Gilliam C Crisden M Learn L Rodriguez R Jickling R Langstaff C Thompson B Bartlett J Robbins K Walton |
| CCA | H.12, Avoid Complacency |
| INPO aspect | QA.4 |
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Finding - Byron - IR 05000454/2012003 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||
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Finding List (Byron) @ 2012Q2
Self-Identified List (Byron)
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