ENS Event | |
|---|---|
22:30 Apr 20, 2018 | |
| Title | Degraded Reactor Vessel Head |
| Event Description | On Friday, April 20, 2018 at 1730 CDT, during the Braidwood Station Unit 1 refueling outage (A1R20), a scheduled ultrasonic test (UT) was performed on the top head to upper center disc weld of the Unit 1 reactor head. The UT identified 19 indications, 9 of which are not acceptable per ASME Section XI, 2001 Edition, 2003 Addenda, Paragraph IWB-3510.
This event is reportable under 10 CFR 50.72(b)(3)(ii)(A) for 'Any event or condition that results in the condition of the nuclear power plant, including its principal safety barriers, being seriously degraded'. The licensee notified the NRC Resident Inspector. |
| Where | |
|---|---|
Braidwood  Illinois (NRC Region 3) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+-0.13 h-0.00542 days <br />-7.738095e-4 weeks <br />-1.78074e-4 months <br />) | |
| Opened: | Rich Rowe 22:22 Apr 20, 2018 |
| NRC Officer: | Dong Park |
| Last Updated: | Apr 20, 2018 |
| 53354 - NRC Website
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WEEKMONTHYEARENS 579782025-10-10T07:30:00010 October 2025 07:30:00
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