ML030310531
| ML030310531 | |
| Person / Time | |
|---|---|
| Site: | Mcguire |
| Issue date: | 01/31/2003 |
| From: | Martin R NRC/NRR/DLPM/LPD2 |
| To: | Jamil D Duke Energy Corp |
| Martin RE, NRR/DLPM, 415-1493 | |
| References | |
| Download: ML030310531 (6) | |
Text
January 31, 2003 Mr. Dhiaa Jamil Vice President, McGuire Site Duke Energy Corporation 12700 Hagers Ferry Road Huntersville, NC 28078-8985
SUBJECT:
WILLIAM B. MCGUIRE NUCLEAR STATION, UNIT 2 RE: REQUEST FOR ADDITIONAL INFORMATION ON STEAM GENERATOR TUBE INSPECTION
Dear Mr. Jamil:
By letters dated March 20 and May 30, 2002, you submitted reports for the McGuire, Unit 2, end of cycle 14 steam generator tube inspection, in accordance with the Technical Specifications and the American Society of Mechanical Engineers Code,Section XI reporting requirements. The Nuclear Regulatory Commission staff has reviewed the information provided and has determined that additional information is required. Our questions are provided in the Enclosure.
Please contact me at (301) 415-1493, if you have any other questions on these issues.
Sincerely,
/RA/
Robert E. Martin, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket No. 50-370
Enclosure:
Request for Additional Information cc w/encl: See next page
- See previous concurrence OFFICE PDII-1PM EMCB:DE PDII-1/LA PDII-1/SC NAME RMartin LLund*
CHawes JNakoski DATE 1/13/03 1/29/03 1/30/03 1/31/03
REQUEST FOR ADDITIONAL INFORMATION ON STEAM GENERATOR TUBE INSPECTION REPORT DUKE POWER COMPANY WILLIAM B. MCGUIRE NUCLEAR STATION, UNIT 2 DOCKET NUMBER 50-370 1.
Provide definitions for the codes HNI and CBH used in the reports under the IND and LOCATION columns, respectively. Explain how these codes are used at McGuire, Unit 2.
2.
Identify all types of imperfections that are left in service (e.g., wear, manufacturing burnish marks, etc.), the number of each type of imperfection, their location in the steam generator and the basis for leaving them in service (e.g., depth sizing, review of historical data, etc.).
3.
The report dated May 30, 2002, indicates that two possible loose parts (PLPs) were confirmed in each steam generator inspected. Describe the actions that were taken upon confirmation of these loose parts, and the basis for leaving them in service, if this was the result.
4.
The steam generator tube inspection reports indicate that a PLP was identified in the freespan in Rows 93 and 95 in steam generator B. The freespan location is an unusual location for a PLP. If not already addressed as a result of question 4, above, describe what actions were taken based on the identification of the PLP signal? Describe any theories/conclusions you have regarding the cause of the PLPs.
5.
The report dated May 30, 2002, indicates that one tube in steam generator B, which contained a volumetric indication, was left in service. What was the volumetric indication attributed to? If it was attributed to degradation, explain the cause of the degradation, the tube and location within the tube where the degradation was identified, and the basis for leaving the tube in service.
6.
The Updated Final Safety Analysis Report (UFSAR) provides some information on the design of the steam generators. Please provide additional details, as follows, which will support the staffs review of the steam generator reports, especially the tables containing the tube-by-tube listing.
A.
Tube Support Plates - The UFSAR states they are an open flow lattice design.
How many tube contact points are there and what is the thickness of the tube support plates?
B.
What is the tube pitch?
C.
What tube expansion method was used on the tube within the tubesheet? How thick is the tubesheet?
D.
Identify the fabricator of the steam generator tubes and the steam generators.
E.
Please provide a diagram of the steam generator which identifies the numbering scheme of the tube support plates and the fan bars. This will enable the staff to determine the location of the imperfections identified in the tube-by-tube listings enclosed with the steam generator reports.
McGuire Nuclear Station cc:
Ms. Lisa F. Vaughn Legal Department (PBO5E)
Duke Energy Corporation 422 South Church Street Charlotte, North Carolina 28201-1006 County Manager of Mecklenburg County 720 East Fourth Street Charlotte, North Carolina 28202 Michael T. Cash 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. C. Jeffrey Thomas Manager - Nuclear Regulatory Licensing Duke Energy Corporation 526 South Church Street Charlotte, North Carolina 28201-1006 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