ML050930029
| ML050930029 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 04/01/2005 |
| From: | James Shea NRC/NRR/DLPM/LPD2 |
| To: | Duke Energy Corp |
| SHea J, 415-1388, NRR/DLPM | |
| Shared Package | |
| ML051010310 | List: |
| References | |
| TAC MC6239, TAC MC6240 | |
| Download: ML050930029 (5) | |
Text
April 1, 2005 LICENSEE:
DUKE ENERGY CORPORATION FACILITY:
MCGUIRE NUCLEAR STATION, UNITS 1 AND 2
SUBJECT:
SUMMARY
OF MARCH 23, 2005, MEETING TO DISCUSS MEASUREMENT UNCERTAINTY RECAPTURE POWER UPRATE (TAC NOS. MC6239 AND MC6240)
On March 23, 2005, at 1:00 p.m., the Nuclear Regulatory Commission (NRC) staff conducted a Category 1 technical meeting with Duke Energy Corporation (Duke or the licensee), at NRC Headquarters in Rockville, Maryland. The purpose of the meeting was to present the technical merits for utilizing American Society of Mechanical Engineers (ASME) flow nozzles for a measurement uncertainty recapture (MUR) power uprate at McGuire Nuclear Station (McGuire),
Units 1 and 2. A list of attendees is provided in Attachment 1 and the handouts provided in the meeting are included in Attachment 2.
The licensee presented a technical drawing and description of the ASME flow nozzles used to measure the feed water flow at McGuire. These flow instruments were installed at McGuire in 1996 to replace venturi flow instruments that had experienced upstream tap erosion. The venturi instrument fouling caused a flow measurement error that resulted in a loss of station electrical generation.
Duke reported that thermal power measurement uncertainty can be as low as 0.25 percent using flow nozzles and that differential pressure based flow instrumentation is a measurement technique based on a mature process. In addition the licensee explained that the low pressure tap, referred to as the wall tap, is insensitive to fouling. Duke considers the ASME flow nozzles as applied at McGuire suitable for a MUR power uprate. The licensee has a time frame of between three and five years for implementation. If approved, Duke would pursue use of ASME nozzles for MUR power uprate at Oconee and Catawba.
The NRC staff asked a number of technical questions concerning the use of the ASME flow nozzle at McGuire including licensee maintenance practices and calibration. The NRC staff also suggested that a first step toward an approved power uprate would be a site-specific topical report using plant empirical data to demonstrate the accuracy of the flow nozzles. If the instrument accuracy and technical basis can be found acceptable by the NRC staff for use in a MUR power uprate at McGuire then an application for a licensing amendment could be reviewed in the same time frame as other MUR power uprate submittals. The NRC staff also discussed the MUR power uprate licensing process and noted some recent amendment approvals that could model for a future license amendment submittal.
Following the business portion of the meeting a question was asked by a member of the public concerning the licensing process for MUR power uprate. The NRC staff explained in more detail the licensing process for MUR power uprate and noted again that a McGuire licensing amendment submittal would be treated as other MUR power uprate amendments by the NRC staff if a site-specific topical report was approved for McGuire.
After no more questions were identified, the meeting was adjourned.
Please direct any inquires concerning this meeting to myself or Mr. John Stang, Senior Project Manager, Power Uprates. Mr. Stang may be reached at (301) 415-1345, or jfs2@nrc.gov.
/RA/
James J. Shea, Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-369 and 50-370 Attachments: 1. Attendance List
- 2. Meeting presentation materials cc w/atts: See next page
ML050930029 NRC-001 OFFICE PDII-1/PM PDII-1/LA PDII-1/SC NAME JShea CHawes JNakoski DATE 03 / 31 /05 03/ 31 /05 04/ 01/05 LIST OF ATTENDEES MEETING TO DISCUSS MUR POWER UPRATE MARCY 23, 2005 NRC DUKE A. Marinos M. Smith Y. Orechwa A. High J. Nakoski S. Warren J. Stang J. Shea P. Rebstock C. Grimes I. Ahmed OTHER J. Wooton, Westinghouse PSE N. Chapman, SERCH/Bechtel
McGuire Nuclear Station cc:
Ms. Lisa F. Vaughn Duke Energy Corporation Mail Code - PB06E 422 South Church Street P.O. Box 1244 Charlotte, North Carolina 28201-1244 County Manager of Mecklenburg County 720 East Fourth Street Charlotte, North Carolina 28202 Mr. C. Jeffrey Thomas Regulatory Compliance Manager Duke Energy Corporation McGuire Nuclear Site 12700 Hagers Ferry Road Huntersville, North Carolina 28078 Anne Cottingham, Esquire Winston and Strawn 1400 L Street, NW.
Washington, DC 20005 Senior Resident Inspector c/o U.S. Nuclear Regulatory Commission 12700 Hagers Ferry Road Huntersville, North Carolina 28078 Dr. John M. Barry Mecklenburg County Department of Environmental Protection 700 N. Tryon Street Charlotte, North Carolina 28202 Mr. Peter R. Harden, IV VP-Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road, 12th Floor Charlotte, North Carolina 28210 Ms. Karen E. Long Assistant Attorney General North Carolina Department of Justice P. O. Box 629 Raleigh, North Carolina 27602 Mr. R. L. Gill, Jr.
Manager - Nuclear Regulatory Issues and Industry Affairs Duke Energy Corporation 526 South Church Street Mail Stop EC05P Charlotte, North Carolina 28202 NCEM REP Program Manager 4713 Mail Service Center Raleigh, North Carolina 27699-4713 Mr. Richard M. Fry, Director Division of Radiation Protection North Carolina Department of Environment, Health and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 Mr. T. Richard Puryear Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, South Carolina 29745