ML073410037

Steam Generator Inservice Inspection 2EOC21 3 Month Report - Letter to RGN-II Regarding Findings of Erroneous Information

ML073410037
Person / Time
Site:	Oconee
Issue date:	05/15/2007
From:	Brandi Hamilton Duke Energy Corp
To:	Travers W NRC/RGN-II
References
2EOC21
Download: ML073410037 (3)

Text

Duke BRUCE HHAMILTON President w DukeVice Energye Oconee Nuclear Station Duke Energy Corporation ONOIVP / 7800 Rochester Highway Seneca. SC 29672 864 885 3487 864 885 4208 fax May 15, 2007 bhhamilton0 eduke.energy. corn Mr. William D. Travers Administrator, Region Ii U.S. Nuclear Regulatory Commission 61 Forsyth Street, S. W., Suite 23T85 Atlanta, GA 30303

Subject:

Oconee Nuclear Station Docket No. 50-270 Steam Generator Inservice Inspection 2EOC21 3 Month Report Gentlemen:

On May 14, 2007, Oconee Nuclear Station notified NRC Region II staff, by telephone, of a case where information supplied to the NRC was not accurate in all material respects. This letter is provided, pursuant to 10 CFR 50.9 Sections (a) and (b), to further document the erroneous information.

Specifically, Duke Energy (DUKE) submitted the Unit 2 End of Cycle 21 (2EOC21) Steam Generator Inservice Inspection 3 Month Report by letter dated February 23, 2006. In Enclosure A of that report, Duke indicated that 15,630 tubes had been inspected on the 2B Steam Generator. Enclosure B indicated a total of 31,257 tubes inspected between the 2A and 2B Steam Generators. It has now been discovered that these numbers were in error, as documented in Oconee Problem Identification Process (PIP) 07-2685, initiated May 13, 2007.

During the Steam Generator Inservice Inspection for the current Unit 2 outage, (2EOC22) discrepancies were noted between current and past inspection data.

Misidentification of tubes during AREVA 2EOC21 inspections resulted in a failure to inspect 33 tubes in the 21 Steam Generator during that outage.

Therefore, it appears at this time that 15,597 Unit 2B tubes (31,224 total 2A and 2B) were actually inspected during the 2EOC21 outage.

www.dct: e.energy.com

Mr. William D. Travers, Administrator, Region II May 15, 2007 Page 2 The 33 tubes inadvertently omitted from inspection during 2EOC-21 have been inspected during the current outage inspection (2EOC-22) with acceptable results.

Therefore, this event is considered to be of no significance with respect to the health and safety of the public.

Duke has requested that AREVA perform an investigation into the root cause of this error and provide a report including the cause and appropriate corrective actions. Duke will implement corrective actions as needed to minimize the potential for recurrence.

Duke will submit additional information to correct or clarify the 2EOC21 3 Month Report.

Please address any questions to Randall P. Todd at (864) 885-3418.

Very truly yours, Bruce BueH. Hamilton,Viersdn Oconee Nuclear Site cc: U.S. Nuclear Regulatory Commission Document Control Desk Washington, D.C. 20555 Mr. L. N. Qlshan Project Manager U.S. Nuclear Regulatory Commission Office of Nuclear Reactor Regulation Washington, D.C. 20555 Mr. D. W. Rich NRC Senior Resident Inspector Oconee Nuclear Station

4 May 15, 2007 Page 3 bxc:

L.E. Nicholson B.G. Davenport R.L. Gill E.B. Kulesa Parker Downing, Jr.

Jeff D. Gilreath G.L. Brouette (ANI)

L.F. Vaughn S.J. Magee(WOE)

Document Control (Master File)

ELL PIP FILE CNS:

H.D. Brewer R.D. Hart MNS:

J.A. Kammer K.L. Ashe