ML071420061
| ML071420061 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 06/05/2007 |
| From: | Stang J NRC/NRR/ADRO/DORL/LPLII-1 |
| To: | Gordon Peterson Duke Power Co |
| Stang J, NRR/DORL, 415-1345 | |
| References | |
| BL-04-001, TAC MC3487, TAC MC3488 | |
| Download: ML071420061 (5) | |
Text
June 5, 2007 Mr. G. R. Peterson Vice President McGuire Nuclear Station Duke Power Company LLC 12700 Hagers Ferry Road Huntersville, NC 28078
SUBJECT:
DUKE POWER COMPANY LLCS RESPONSE TO BULLETIN 2004-01, "INSPECTIONS OF ALLOY 82/182/600 MATERIALS USED IN THE FABRICATION OF PRESSURIZER PENETRATIONS AND STEAM SPACE PIPING CONNECTIONS AT PRESSURIZED-WATER REACTORS," FOR MCGUIRE NUCLEAR STATION, UNITS 1 AND 2 (TAC NOS. MC3487 AND MC3488)
Dear Mr. Peterson:
On May 28, 2004, the U.S. Nuclear Regulatory Commission (NRC) issued Bulletin 2004-01, "Inspections of Alloy 82/182/600 Materials Used in the Fabrication of Pressurizer Penetrations and Steam Space Piping Connections at Pressurized-Water Reactors," to the industry. This bulletin informed addressees that current methods of inspecting the pressurizer penetrations and steam space piping connections fabricated from Alloy 82/182/600 materials may need to be supplemented with additional measures (e.g., bare-metal visual inspections) to detect pressurizer penetration and steam space piping connection flaws or leakage. The bulletin requested that addressees provide the NRC with information related to the materials of construction, the inspections that have been performed, and the inspections which will be performed to verify the integrity of the pressurizer penetrations and steam space piping connections.
By letter dated July 27, 2004 (Agencywide Documents Access and Management System (ADAMS) Accession No. ML042110135), and by supplemental letters dated September 21, 2004 (ADAMS Accession No. ML042750234), May 19, 2005 (ADAMS Accession No. ML0511530324), and November 1, 2005 (ADAMS Accession No. ML053130260), Duke Power Company LLC (the licensee) provided its responses to items 1a, 1b, 1c, and 1d of Bulletin 2004-01 for McGuire Nuclear Station, Units 1 and 2 (McGuire). The licensees responses described its materials of fabrication and past, current and future pressurizer penetrations and steam space piping inspection programs at McGuire 1 and 2.
The licensees response to item 1a reported that some of the materials used in the fabrication of the pressurizer penetrations and steam space piping connections were Alloy 82/182/600 materials. This reply required you to provide further responses to the remaining items in the bulletin.
In response to item 1b, the licensee described prior inspections and inspection results of
G. Peterson pressurizer penetrations and steam space piping connections which had been performed at McGuire 1 and 2. The licensees response included the basis for concluding that McGuire 1 and 2 satisfies the applicable regulatory requirements related to the integrity of pressurizer penetrations and steam space piping connections.
In response to item 1c in the bulletin, the licensee provided a description of the Alloy 82/182/600 pressurizer penetration and steam space piping connection inspection program that will be implemented at your plant during the next and subsequent refueling outages. The description included the items to be inspected; the percent coverage that would be performed at each location, the inspection methods to be used, the qualification standards for the inspection methods and personnel, the process used to resolve any inspection indications, the inspection documentation to be generated, and the basis for concluding that your plant will satisfy the applicable regulatory requirements related to the structural and leakage integrity of pressurizer penetrations and steam space piping connections. If leaking pressurizer penetrations or steam space piping connections are found, the licensee indicated that follow-up nondestructive examinations (NDE) will be performed to characterize flaws in the leaking penetrations. The licensee provided its plans for expansion of the scope of NDE to be performed if circumferential flaws are found in any portion of the leaking pressurizer penetrations or steam space piping connections.
In response to item 1d in the bulletin, the licensee explained why the inspection program identified in the response to item 1c in the bulletin is adequate for the purpose of maintaining the integrity of the McGuire 1 and 2 reactor coolant pressure boundary and for meeting all applicable regulatory requirements which pertain to your facility.
By letters dated May 19, 2005, and November 1, 2005, the licensee provided a response to item 2a in Bulletin 2004-01. This letter provided a statement to the NRC indicating that the inspections described in your response to item 1c of the bulletin were completed during a recent McGuire 1 and 2 outages and a description of the as-found condition of the locations inspected was provided. The licensee also described any findings of relevant indications of through-wall leakage and follow-up NDE performed to characterize flaws in leaking penetrations or steam space piping connections. A summary of all relevant indications found by NDE, a summary of the disposition of any findings of boric acid, and a description of any corrective actions taken and/or repairs made as a result of the indications found was also provided in this letter.
The NRC staff has completed its activities associated with the review of the licensee's responses to Bulletin 2004-01 and finds the licensee's response to be acceptable. It should be noted that industry commitments or staff regulatory actions may result in the need for you to modify your plans for the inspection and repair of items discussed in Bulletin 2004-01. For example, specific actions addressed in topical report MRP-139, "Materials Reliability Program:
Primary System Piping Butt Weld Inspection and Evaluation Guideline" and/or plant-specific Confirmatory Action Letters regarding dissimilar metal butt welds encompassed by Bulletin 2004-01 may exceed the scope of actions addressed in your response to Bulletin 2004-01. It is the staffs expectation that you will revise your plan for the inspection and repair of items discussed in Bulletin 2004-01 consistent with other industry commitments or staff regulatory
G. Peterson actions. This closes the staffs efforts with regard to the review of the Bulletin 2004-01 response for McGuire 1 and 2. Please contact me at (301) 415-1345 if you have any questions on this issue.
Sincerely,
/RA/
John Stang, Senior Project Manager Plant Licensing Branch II-1 Division of Operating Reactor Licensing Office of Nuclear Reactor Regulation Docket Nos. 50-369 and 50-370 cc: See next page
ML071420061 OFFICE NRR/LPL2-1/PM NRR/LPL2-1/LA NRR/CVIB/BC NRR/PGCB/LPM NRR/LPL2-1/BC NAME JStang:nc MOBrien MMitchell JODriscoll EMarinos DATE 05/31/07 05/30/07 6/4/07 05/31/07 6/5/07
McGuire Nuclear Station, Units 1 & 2 cc:
Vice President McGuire Nuclear Station Duke Power Company, LLC 12700 Hagers Ferry Road Huntersville, NC 28078 Associate General Counsel and Managing Attorney Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, North Carolina 28202 County Manager of Mecklenburg County 720 E. Fourth St.
Charlotte, NC 28202 Regulatory Compliance Manager Duke Energy Corporation McGuire Nuclear Site 12700 Hagers Ferry Road Huntersville, NC 28078 Senior Resident Inspector U.S. Nuclear Regulatory Commission 12700 Hagers Ferry Road Huntersville, NC 28078 Mecklenburg County Department of Environmental Protection 700 N. Tryon St Charlotte, NC 28202 Vice President Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road, 12th Floor Charlotte, NC 28210 NCEM REP Program Manager 4713 Mail Service Center Raleigh, NC 27699-4713 Assistant Attorney General NC Department of Justice P.O. Box 629 Raleigh, NC 27602 Manager Nuclear Regulatory Issues &
Industry Affairs Duke Energy Corporation 526 S. Church St.
Mail Stop EC05P Charlotte, NC 28202 Division of Radiation Protection NC Dept of Environment, Health & Natural Resources 3825 Barrett Dr.
Raleigh, NC 27609-7721 Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, SC 29745 Group Vice President, Nuclear Generation
& Chief Nuclear Officer P.O. Box 1006-EC07H Charlotte, NC 28201-1006 Senior Counsel Duke Energy Carolinas, LLC 526 South Church Street - EC07H Charlotte, NC 28202