ML053480051
| ML053480051 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/13/2005 |
| From: | Hartz L Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 05-803, BL-04-001 | |
| Download: ML053480051 (3) | |
Text
VIRGINIA ELECTRIC AND POWER COMPANY
- RICHMOND, VIRGINIA 23261 December 13, 2005 U.S. Nuclear Regulatory Commission Serial No.:
05-803 Attention: Document Control Desk NL&OS/ETS Rev 0 Washington, D. C. 20555 Docket No.:
50-339 License No.:
NPF-7 PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNEl PERFORMED FOR NRC BULLETIN 2004-01 In a letter dated May 28, 2004, the NRC issued NRC Bulletin 2004-01, "Inspection of Alloy 82/182/600 Materials Used in the Fabrication of Pressurizer Penetrations and Steam Space Piping Connections at Pressurized-Water Reactors (PW Rs)." The bulletin requested inspection of the Alloy 82/182/600 materials used in the pressurizer penetrations and steam space piping connections. It also requested a 60-day report regarding the inspections performed, including the as-found condition of the pressurizer shell and associated penetrations.
During the fall 2005 refueling outage for North Anna Unit 2, Dominion performed 100%
bare metal visual examination of the welds connecting the pressurizer spray, three safety valves, and the power-operated relief valve nozzles to the associated downstream piping. No indications of leakage or cracking were found. In addition, best effort ultrasonic examinations were performed to the greatest extent possible given certain geometric limitations, resulting in an aggregate coverage of about 60%.
No reportable axial or circumferential flaws were found. Because the coverage was limited, no credit is taken towards fulfilling MRP-139 requirements. The ability to perform examinations that comply with Code and MRP-139 coverage and frequency requirements, and the alternatives relative to applying some form of mitigation to these welds are currently being analyzed.
Should you have any questions regarding Dominion's response to the bulletin, please contact Mr. Thomas Shaub at (804) 273-2763.
Very truly yours, Leslie N. Hartz L/
Vice President - Nuclear Engineering Commitments made in this letter: None
Serial No.05-803 Docket No. 50-339 Response to BL 2004-01 Page 2 of 3 cc:
U.S.
Nuclear Regulatory Commission Region II Sam Nunn Atlanta Federal Center 61 Forsyth Street, SW Suite 23 T85 Atlanta, Georgia 30303-8931 Mr. J. T. Reece NRC Senior Resident Inspector North Anna Power Station Mr. S. R. Monarque NRC Project Manager U. S. Nuclear Regulatory Commission One White Flint North 11 555 Rockville Pike Mai I Stop 8-H 1 2 Rockville, Maryland 20852 Mr. J. E. Reasor, Jr.
Old Dominion Electric Cooperative lnnsbrook Corporate Center, Suite 300 4201 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. M. M. Grace Authorized Nuclear I nspecto r North Anna Power Station
Serial No.05-803 Docket No. 50-339 Response to BL 2004-01 Page 3 of 3 North Anna Power Station Unit 2 Results of Inspection of Alloy 82/182/600 Materials Used In Pressurizer Penetrations and Steam Space Piping Connections Performed for NRC Bulletin 2004-01 COMMONWEALTH OF VIRGINIA
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COUNTY OF HENRICO The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by Leslie N. Hartz, who is Vice President - Nuclear Engineering of Virginia Electric & Power Company. She has affirmed before me that she is duly authorized to execute and file the foregoing document in behalf of those companies, and that the statements in the document are true to the best of her knowledge and belief.
Acknowledged before me this /3? day of,(f&&mh Y,2005.
My Commission Expires: L. /hkh 3f, h o b.
(S EAL)