ENS 50517: Difference between revisions
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| event date = 10/07/2014 19:00 CDT | | event date = 10/07/2014 19:00 CDT | ||
| last update date = 10/07/2014 | | last update date = 10/07/2014 | ||
| title = Ultrasonic Testing Reveal Degraded Condition | | title = Ultrasonic Testing Reveal Degraded Condition on One Control Rod Drive Mechanism Penetration | ||
| event text = In accordance with 10 CFR 50.72(b)(3)(ii)(A), this notification reports a degraded condition on Byron Station Unit 2 that occurred on October 7, 2014, when it was determined that the results of planned ultrasonic testing (UT) examinations performed on one CRDM penetration of the reactor vessel head would not meet the applicable acceptance criteria. Byron Station Unit 2 is presently in day eight of a refueling outage. The examinations were | | event text = In accordance with 10 CFR 50.72(b)(3)(ii)(A), this notification reports a degraded condition on Byron Station Unit 2 that occurred on October 7, 2014, when it was determined that the results of planned ultrasonic testing (UT) examinations performed on one CRDM penetration of the reactor vessel head would not meet the applicable acceptance criteria. Byron Station Unit 2 is presently in day eight of a refueling outage. The examinations were | ||
being performed to meet the requirements of 10 CFR 50.55a(g)(6)(ii)(D) and ASME Code Case N-729-1 to ensure the structural integrity of the reactor vessel head pressure boundary. The UT examinations continue for the remaining CRDM head penetrations. The repairs are currently being planned and will be completed prior to unit start-up. | being performed to meet the requirements of 10 CFR 50.55a(g)(6)(ii)(D) and ASME Code Case N-729-1 to ensure the structural integrity of the reactor vessel head pressure boundary. The UT examinations continue for the remaining CRDM head penetrations. The repairs are currently being planned and will be completed prior to unit start-up. |
Latest revision as of 21:49, 1 March 2018
Where | |
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Byron ![]() Illinois (NRC Region 3) | |
Reporting | |
10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
Time - Person (Reporting Time:+-2.63 h-0.11 days <br />-0.0157 weeks <br />-0.0036 months <br />) | |
Opened: | Charles Berger 21:22 Oct 7, 2014 |
NRC Officer: | Dong Park |
Last Updated: | Oct 7, 2014 |
50517 - NRC Website
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