ML20237C459
| ML20237C459 | |
| Person / Time | |
|---|---|
| Site: | McGuire, Mcguire  |
| Issue date: | 08/19/1998 |
| From: | Rinaldi F NRC (Affiliation Not Assigned) |
| To: | Barron H DUKE POWER CO. |
| References | |
| GL-96-06, GL-96-6, TAC-M96830, TAC-M96831, NUDOCS 9808210188 | |
| Download: ML20237C459 (4) | |
Text
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l-UNITED STATES g
j NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 30846 4001
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August 19, 1998 Mr. H. B. Barron j
Vice President, McGuire Site
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Duke Energy Corporation 12700 Hagers Ferry Road Huntersville, North Carolina 28078-8985 St>3 JECT:
REQUEST FOR ADDITIONAL INFORMATION REGARDING RESPONSE TO GENERIC LETTER 96-06 FOR MCGUIRE UNITS 1 AND 2 (TACS M96830 AND M96831) l
Reference:
Letter from Duke Power Company (the licensee) to NRC regarding response to
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Generic Letter (GL) 96-06 dated January 28,1997
Dear Mr. Barron:
The staff has reviewed the referenced submittal regarding GL 96-06, " Assurance of Equipment Operability and Containment integrity During Design Basis Accident Conditions." The submittal addresses the issues of waterhammer, two-phase flow, and thermally induced pressurization of piping runs penetrating the containment for McGuire Units 1 and 2.
In your submittal, you indicated that a total of five pipe segments are isolated by at least one soft seated diaphragm valve in each unit, and are susceptible to thermally induced pressurization. Also, you stated that these soft seated valves are capable of slight leakage or displacement. In order to complete its review, the staff requires the following information.
- 1. Describe the applicable design criteria for the piping and valves. Include the required load combinations.
- 2. Provide a drawing of the valve. Identify the pressure at which the valve was determined to lift off its seat or leak, and describe the method used to estimate this pressure.
Discuss any sources of uncertainty associated with the estimated liftoff or leakage l
pressure.
- 3. Provide the maximum-calculated stress in the piping run based on the estimated liftoff
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I H. B. Barron August 19, 1998 i
l Please provide your response by September 30,1998. This date was discussed with Mr. M. Cash of your staff.
Sincerely, ORIGINAL SIGNED BY:
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Frank Rinaldi, Project Manager Project Directorate ll-2 Division of Reactor Projects - 1/11
~ Office of Nuclear Reactor Regulation l Docket Nos. 50-369 and 50-370' cc: See next page Distribution:
Docket File PUBLIC PD 11-2 Rdg.
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~ To receive a copy of this document, indicate in the box:
"C" = Copy "N" = No copy I
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NAME FRinaldi:enQ LfBerry M )
HB8rW DATE 6 /11 /98
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DOCUMENT NAME: G:\\MCGUIRE\\M96830.RAI OFFICIAL RECORD COPY I'
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l Please provide your response by September 30,1998. This date was discussed with Mr. M. Cash of your staff.
Sincerely, l
Frank Rinaldi, Project Manager Project Directorate ll-2 Division of Reactor Projects -l/Il Office of Nuclear Reactor Regulation Docket Nos. 50-369 &nd 50-370 cc: See next page i
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McGuire Nuclear Station cc:
Mr. Paul R. Newton Ms. Karen E. Long Legal Department (PBOSE)
Assistant Attomey General Duke Energy Corporation North Carolina Department of 422 South Church Street Justice Charlotte, North Carolina 28242 P. O. Box 629 Raleigh, North Carolina 27602 County Manager of Mecklenburg County L. A. Keller 720 East Fourth Street Manager-Nuclear Regulatory Charlotte, North Carolina 28202 Licenring 4
Duke Energy Corporation
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Michael T. Cash 526 South Church Street Regulatory Compliance Manager Charlotte, North Carolina 28242 Duke Energy Corporation -
McGuire Nuclear Site Regional Administrator, Region 11 12700 Hagers Ferry Road U.S. Nuclear Regulatory Commission Huntersville, North Carolina 28078 Atlanta Federal Center 61 Forsyth Street, S.W., Suite 23T85 J. Michael McGarry, lil, Esquire Atlanta, Georgia 30303 Winston and Strtwn 1400 L Street, NW.
Elaine Wathen, Lead REP Planner Washington, DC 20005 Division of Emergency Management 116 West Jones Street Senior Resident inspector Rale.ph, North Carolina 27603-1335 clo U.S. Nuclear Regulatory Commission Mr. Richard M. Fry, Director 12700 Hagers Ferry Road Division of Radiation Protection Huntersville, North Carolina 28078 North Carolina Department of Environment, Health and Natual Dr. John M. Barry Resources Mecklenbetg County 3825 Barrett Drive
' Department of Environmental Raleigh, North Carolina 27609-7721 Protection 700 N. Tryon Street Mr. T. Richard Puryest Charlotte, North Carolina 28202 Owners Group (NCEMC)
Duke Energy Corporation Peter R. Harden, IV 4800 Concord Road Account Manager York, South Carolina 29745 Energy Systems Sales Westinghouse Electric Corpoietion P. O. Box 7288 Charlotte, North Carolina 28241-7288 a
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