ENS 48435: Difference between revisions
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| event date = 10/23/2012 19:22 EDT | | event date = 10/23/2012 19:22 EDT | ||
| last update date = 10/25/2012 | | last update date = 10/25/2012 | ||
| title = Degraded Condition Due | | title = Degraded Condition Due to Reactor Head Vessel Penetration Indications | ||
| event text = On October 23, 2012, V. C. Summer Station Unit 1 (VCSNS) identified two reactor vessel head penetrations (19 and 52) that did not meet the requirements of 10CFR50.55a(g)(6)(ii)(D) and ASME Code Case N-729-1. The station is in a refueling outage (RF20) and the plant is currently shutdown and in Mode 6. The reactor vessel head (RVH) contains a total of 66 penetrations and inspection efforts are approximately 50% percent complete. There have been no previous repairs to the reactor vessel head penetrations and/or j-groove welds. The indications are not through wall as indicated by volumetric and bare metal visual inspections. The penetrations will be repaired to meet the requirements of 10CFR50.55a prior to returning the vessel head to service. | | event text = On October 23, 2012, V. C. Summer Station Unit 1 (VCSNS) identified two reactor vessel head penetrations (19 and 52) that did not meet the requirements of 10CFR50.55a(g)(6)(ii)(D) and ASME Code Case N-729-1. The station is in a refueling outage (RF20) and the plant is currently shutdown and in Mode 6. The reactor vessel head (RVH) contains a total of 66 penetrations and inspection efforts are approximately 50% percent complete. There have been no previous repairs to the reactor vessel head penetrations and/or j-groove welds. The indications are not through wall as indicated by volumetric and bare metal visual inspections. The penetrations will be repaired to meet the requirements of 10CFR50.55a prior to returning the vessel head to service. | ||
The inspection results are reportable pursuant to 10CFR50.72(b)(3)(ii)(A). The NRC Resident Inspector has been notified. | The inspection results are reportable pursuant to 10CFR50.72(b)(3)(ii)(A). The NRC Resident Inspector has been notified. | ||
Latest revision as of 21:02, 1 March 2018
| Where | |
|---|---|
Summer  South Carolina (NRC Region 2) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-2.38 h-0.0992 days <br />-0.0142 weeks <br />-0.00326 months <br />) | |
| Opened: | Bruce Thompson 20:59 Oct 23, 2012 |
| NRC Officer: | Vince Klco |
| Last Updated: | Oct 25, 2012 |
| 48435 - NRC Website
| |