ENS 52275: Difference between revisions
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| event date = 10/02/2016 16:00 CDT | | event date = 10/02/2016 16:00 CDT | ||
| last update date = 10/03/2016 | | last update date = 10/03/2016 | ||
| title = Liquid Penetration Examination Results | | title = Liquid Penetration Examination Results in Indications on Reactor Vessel Head Penetration | ||
| event text = On October 2, 2016 during the Braidwood Station Unit Refueling outage (A1R19), an in-service Liquid Penetration examination was performed on the previously repaired control rod drive mechanism (CRDM) penetration 69. During the examination on the weld build up for CRDM penetration 69, two indications were discovered. A 7/32 inch rounded indication was discovered located at 359 degrees on the reactor head portion of the weld buildup, and it is 4 inches from the transition of the head to penetration. A 1/4 inch rounded indication was also discovered located at 200 degrees at the transition of the head to penetration. 0 degrees is located at the outermost portion of the penetration on the flange side. The transition is the point where the vertical portion of the penetration meets the horizontal area of the reactor head. | | event text = On October 2, 2016 during the Braidwood Station Unit Refueling outage (A1R19), an in-service Liquid Penetration examination was performed on the previously repaired control rod drive mechanism (CRDM) penetration 69. During the examination on the weld build up for CRDM penetration 69, two indications were discovered. A 7/32 inch rounded indication was discovered located at 359 degrees on the reactor head portion of the weld buildup, and it is 4 inches from the transition of the head to penetration. A 1/4 inch rounded indication was also discovered located at 200 degrees at the transition of the head to penetration. 0 degrees is located at the outermost portion of the penetration on the flange side. The transition is the point where the vertical portion of the penetration meets the horizontal area of the reactor head. | ||
Rounded indications that exceed 3/16 inch are rejectable per ASME Code Case N-729-1. | Rounded indications that exceed 3/16 inch are rejectable per ASME Code Case N-729-1. |
Latest revision as of 21:44, 1 March 2018
Where | |
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Braidwood Illinois (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
LER: | 05000456/LER-2016-003 |
Time - Person (Reporting Time:+3.03 h0.126 days <br />0.018 weeks <br />0.00415 months <br />) | |
Opened: | Ron Bruck 00:02 Oct 3, 2016 |
NRC Officer: | Dong Park |
Last Updated: | Oct 3, 2016 |
52275 - NRC Website
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