ENS Event | |
|---|---|
04:00 Mar 31, 2018 | |
| Title | One Head Penetration Not Acceptable During Penetration Examinations |
| Event Description | On March 31, 2018, during the Indian Point Unit 2 refueling outage, with the reactor defueled and the head removed and located on the head stand, and all fuel from the reactor vessel removed and located in the spent fuel pool, while performing planned examinations on the 97 reactor vessel head penetrations, it was determined that one penetration could not be dispositioned as acceptable per the requirements of 10CFR50.55a for the reactor coolant system pressure boundary. The examinations are being performed to the meet the requirements of 10CFR50.55a(g)(6)(ii)(D), and ASME Code Case N-729-4, to find potential flaws/indications well before they increase to a degree that could potentially challenge the reactor vessel head pressure boundary. All other reactor vessel head penetrations have had a bare metal visual inspection completed with no other indications identified. The station is currently performing the remaining non-destructive examinations required by Code Case N-729-4.
Repairs are currently being planned, and will be completed prior to entering Mode 5 from the current refueling outage. This is reportable, pursuant to 10CFR50.72(b)(3)(ii)(A) since the as found indications did not meet the applicable acceptance criteria referenced in ASME Code Case N-729-4 to remain in-service without repair. The NRC Resident Inspector has been informed. The licensee has also notified the NY Public Service Commission. |
| Where | |
|---|---|
Indian Point  New York (NRC Region 1) | |
| Reporting | |
| 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded | |
| Time - Person (Reporting Time:+15.55 h0.648 days <br />0.0926 weeks <br />0.0213 months <br />) | |
| Opened: | Adam Hukill 19:33 Mar 31, 2018 |
| NRC Officer: | Jeff Herrera |
| Last Updated: | Mar 31, 2018 |
| 53305 - NRC Website
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WEEKMONTHYEARENS 535892018-09-07T04:00:0007 September 2018 04:00:00
[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)(2)(i), Tech Spec Required Shutdown, 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded Technical Specification Required Shutdown ENS 533052018-03-31T04:00:00031 March 2018 04:00:00 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded One Head Penetration Not Acceptable During Penetration Examinations 2018-09-07T04:00:00 | |