ENS 48491

v t e ENS Event
17:40 Nov 7, 2012
Title	Liquid Penetrant Surface Indications Found on Control Rod Drive Return Nozzle Safe End to Pipe Weld
Event Description	Oyster Creek Nuclear Generating Station is currently in Cold Shutdown executing Refueling Outage 1R24, which includes in-service inspections. At 1240 EST, General Electric notified Oyster Creek Management of surface indications that were detected by dye penetrant testing. The indications are in the adjacent base material area of the System Pressure Boundary weld. The indications are located Top Dead Center (TDC) of the 3 inch pipe. Indication #1 is upstream 0.7 inches away from the weld toe, the indication is 1.5" long. Indication #2 is downstream 0.2 inches away from the weld toe, the indication is 2.5" long. The depth of the indications are unknown at this time. Initial investigation revealed that there was no moisture or leakage found in the area of the indications. Further investigation is in progress to better characterize the indications. The cause is under investigation and corrective action plans are being developed. The surface defects have been evaluated by Exelon and determined to meet the criteria for reporting identified in NUREG-1022: Welding or material defects in the primary coolant system that cannot be found acceptable under ASME Section XI. IWB-3600, 'Analytical Evaluation of Flaws,' or ASME Section XI, Table IWB-3410-1, 'Acceptable Standards'. The NRC Resident Inspector has been informed.

ENS 48491 +/-
Where
Oyster Creek New Jersey (NRC Region 1)
Reporting

10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded
Time - Person (Reporting Time:+2.63 h0.11 days <br />0.0157 weeks <br />0.0036 months <br />)
Opened:	Andrew Zuchowski 20:18 Nov 7, 2012
NRC Officer:	Charles Teal
Last Updated:	Nov 7, 2012
48491 - NRC Website
v • d • e

v t e Emergency Notification System
Oyster Creek with 10 CFR 50.72(b)(3)(ii)(A), Seriously Degraded
WEEKMONTHYEAR2012-11-07T17:40:00 [Table view]
[ENS list for Oyster Creek]

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