ENS Event | |
|---|---|
20:25 Apr 16, 2013 | |
| Title | Potential Cable Size and Breaker Mismatch |
| Event Description | During investigation of a documentation discrepancy, a potential cable size and breaker mismatch was identified to exist in a non-safety related DC panel. Initial evaluation has shown that the cable may heat and be potentially damaged if exposed to a 'smart' high impedance fault for an extended period. This discovered condition has not been previously analyzed for NFPA [National Fire Protection Association] 805 common enclosure circuit coordination.
Fire watches were established as a compensatory measure immediately following identification of the issue on April 8, 2013. An initial review of fire protection analysis was completed on April 16, 2013. Fire watches remain in place until a modification which will restore coordination is complete. The licensee notified the NRC Resident Inspector.
An analysis demonstrated that adjacent cables in the common enclosure would not be damaged, therefore, the condition does not significantly degrade plant safety. The licensee has notified the NRC Resident Inspector. Notified R2DO (McCoy). |
| Where | |
|---|---|
Harris  North Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition | |
| Time - Person (Reporting Time:+-3.17 h-0.132 days <br />-0.0189 weeks <br />-0.00434 months <br />) | |
| Opened: | Mark Lee 17:15 Apr 16, 2013 |
| NRC Officer: | Charles Teal |
| Last Updated: | Jun 4, 2013 |
| 48932 - NRC Website
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Unit 1 | |
|---|---|
| Reactor critical | Critical |
| Scram | No |
| Before | Power Operation (100 %) |
| After | Power Operation (100 %) |
WEEKMONTHYEARENS 511782015-06-16T15:45:00016 June 2015 15:45:00
[Table view]10 CFR 50.72(b)(3)(v)(D), Loss of Safety Function - Mitigate the Consequences of an Accident, 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Unanalyzed Condition Due to Open High Energy Line Break Doors ENS 501972014-06-12T16:47:00012 June 2014 16:47:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Inadequate Dc Cable Protection Could Adversely Affect Safe Shutdown ENS 489322013-04-16T20:25:00016 April 2013 20:25:00 10 CFR 50.72(b)(3)(ii)(B), Unanalyzed Condition Potential Cable Size and Breaker Mismatch 2015-06-16T15:45:00 | |