ML020180061
| ML020180061 | |
| Person / Time | |
|---|---|
| Site: | Mcguire, Catawba, McGuire  |
| Issue date: | 01/17/2002 |
| From: | Rani Franovich Division of Regulatory Improvement Programs |
| To: | Tuckman M Duke Energy Corp |
| Franovich R, NRR/RLSB, 415-1868 | |
| References | |
| Download: ML020180061 (9) | |
Text
January 17, 2002 Mr. M. S. Tuckman Executive Vice-President Nuclear Generation Duke Energy Corporation PO Box 1006 Charlotte, NC 28201-1006
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE MCGUIRE NUCLEAR STATION, UNITS 1 AND 2, AND CATAWBA NUCLEAR STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION (LRA)
Dear Mr. Tuckman:
By letter dated June 14, 2001, Duke Energy Corporation (Duke) submitted for Nuclear Regulatory Commission (NRC) review an application, pursuant to 10 CFR Part 54, to renew the operating licenses for the McGuire Nuclear Station, Units 1 and 2, and Catawba Nuclear Station, Units 1 and 2. The NRC staff is reviewing the information contained in this license renewal application and has identified, in the enclosure, areas where additional information is needed to complete its review. Specifically, the enclosed request for additional information (RAI) is from the following sections of the LRA:
Section 2.5, Scoping and Screening Results: Electrical and Instrumentation and Controls Section 3.6, Aging Management of Electrical and Instrumentation and Controls Appendix B, B.3.19, Inaccessible Non-EQ Medium-voltage Cables Aging Management Program Please provide a schedule by letter, or electronic mail for the submittal of your response within 30 days of the receipt of this letter. Additionally, the staff would be willing to meet with Duke prior to the submittal of the response to clarify the staffs request for additional information.
Sincerely,
/RA/
Rani L. Franovich, Project Manager License Renewal and Environmental Impacts Branch Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket Nos. 50-369, 50-370, 50-413 and 50-414
Enclosure:
As stated cc w/encl: See next page
Mr. M. S. Tuckman Executive Vice-President Nuclear Generation Duke Energy Corporation PO Box 1006 Charlotte, NC 28201-1006
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE MCGUIRE NUCLEAR STATION, UNITS 1 AND 2, AND CATAWBA NUCLEAR STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION
Dear Mr. Tuckman:
By letter dated June 14, 2001, Duke Energy Corporation (Duke) submitted for Nuclear Regulatory Commission (NRC) review an application, pursuant to 10 CFR Part 54, to renew the operating licenses for the McGuire Nuclear Station, Units 1 and 2, and Catawba Nuclear Station, Units 1 and 2. The NRC staff is reviewing the information contained in this license renewal application and has identified, in the enclosure, areas where additional information is needed to complete its review. Specifically, the enclosed request for additional information (RAI) is from Section 3.6, Aging Management of Electrical and Instrumentation and Controls.
Section 2.5, Scoping and Screening Results: Electrical and Instrumentation and Controls Section 3.6, Aging Management of Electrical and Instrumentation and Controls Appendix B, B.3.19, Inaccessible Non-EQ Medium-voltage Cables Aging Management Program Please provide a schedule by letter, or electronic mail for the submittal of your response within 30 days of the receipt of this letter. Additionally, the staff would be willing to meet with Duke prior to the submittal of the response to provide clarification of the staffs request for additional information.
Sincerely,
/RA/
Rani L. Franovich, Project Manager License Renewal and Environmental Impacts Branch Division of Regulatory Improvement Programs Office of Nuclear Reactor Regulation Docket Nos. 50-369, 50-370, 50-413 and 50-414
Enclosures:
As stated cc w/encl: See next page DISTRIBUTION:
See next page
- See previous concurrence Document Name: C:\\Program Files\\Adobe\\Acrobat 4.0\\PDF Output\\Duke RAI - Electrical.wpd OFFICE PM:RLEP:DRIP LA:DRIP SC:RLEP:DRIP BC:RLEP:DRIP NAME RFranovich EGHylton PTKuo CIGrimes DATE 01/15/2002 01/15/2002 01/17/2002 01/17/2002 OFFICIAL RECORD COPY
DISTRIBUTION:
HARD COPY RLSB RF E. Hylton E-MAIL:
PUBLIC J. Johnson W. Borchardt D. Matthews C. Carpenter C. Grimes B. Zalcman J. Strosnider (RidsNrrDe)
E. Imbro G. Bagchi K. Manoly W. Bateman J. Calvo C. Holden P. Shemanski S. Rosenberg G. Holahan B. Boger D. Thatcher G. Galletti B. Thomas J. Moore R. Weisman M. Mayfield A. Murphy W. McDowell S. Droggitis N. Dudley RLEP Staff R. Martin C. Patel C. Julian (RII)
R. Haag (RII)
A. Fernandez (OGC)
J. Wilson M. Khanna C. Munson R. Elliott D. Nguyen
McGuire & Catawba Nuclear Stations, Units 1 and 2 Mr. Gary Gilbert Regulatory Compliance Manager Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Ms. Lisa F. Vaughn Duke Energy Corporation 422 South Church Street Charlotte, North Carolina 28201-1006 Anne Cottington, Esquire Winston and Strawn 1400 L Street, NW Washington, DC 20005 North Carolina Municipal Power Agency Number 1 1427 Meadowwood Boulevard P. O. Box 29513 Raleigh, North Carolina 27626 County Manager of York County York County Courthouse York, South Carolina 29745 Piedmont Municipal Power Agency 121 Village Drive Greer, South Carolina 29651 Ms. Karen E. Long Assistant Attorney General North Carolina Department of Justice P. O. Box 629 Raleigh, North Carolina 27602 Ms. Elaine Wathen, Lead REP Planner Division of Emergency Management 116 West Jones Street Raleigh, North Carolina 27603-1335 Mr. Robert L. Gill, Jr.
Duke Energy Corporation Mail Stop EC-12R P. O. Box 1006 Charlotte, North Carolina 28201-1006 Mr. Alan Nelson Nuclear Energy Institute 1776 I Street, N.W., Suite 400 Washington, DC 20006-3708 North Carolina Electric Membership Corporation P. O. Box 27306 Raleigh, North Carolina 27611 Senior Resident Inspector U.S. Nuclear Regulatory Commission 4830 Concord Road York, South Carolina 29745 Mr. Virgil R. Autry, Director Dept of Health and Envir Control 2600 Bull Street Columbia, South Carolina 29201-1708 Mr. C. Jeffrey Thomas Manager - Nuclear Regulatory Licensing Duke Energy Corporation 526 South Church Street Charlotte, North Carolina 28201-1006 Mr. L. A. Keller Duke Energy Corporation 526 South Church Street Charlotte, North Carolina 28201-1006 Saluda River Electric P. O. Box 929 Laurens, South Carolina 29360 Mr. Peter R. Harden, IV VP-Customer Relations and Sales Westinghouse Electric Company 6000 Fairview Road - 12th Floor Charlotte, North Carolina 28210 Mr. T. Richard Puryear Owners Group (NCEMC)
Duke Energy Corporation 4800 Concord Road York, South Carolina 29745 Mr. Richard M. Fry, Director North Carolina Dept of Env, Health, and Natural Resources 3825 Barrett Drive Raleigh, North Carolina 27609-7721 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 Senior Resident Inspector 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. Gregory D. Robison Duke Energy Corporation Mail Stop EC-12R 526 S. Church Street Charlotte, NC 28201-1006 Mary Olson Nuclear Information & Resource Service Southeast Office P.O. Box 7586 Asheville, North Carolina 28802 Paul Gunter Nuclear Information & Resource Service 1424 16th Street NW, Suite 404 Washington, DC 20036 Lou Zeller Blue Ridge Environmental Defense League P.O. Box 88 Glendale Springs, North Carolina 28629 Don Moniak Blue Ridge Environmental Defense League Aiken Office P.O. Box 3487 Aiken, South Carolina 29802-3487
Request for Additional Information (RAI)
McGuire Nuclear Station, Units 1 and 2, and Catawba Nuclear Station, Units 1 and 2 2.5 Scoping and Screening Results: Electrical and Instrumentation and Controls RAI 2.5-1 Section 2.5 of the LRA indicates that the switchyard systems (i.e., switchyard bus, transmission conductors, and high-voltage insulators) do not meet any of the scoping criteria of §54.4(a). §54.4(a)(3) requires all systems, structures, and components to be included in the scope of license renewal that are relied on in safety analyses or plant evaluations to perform a function that demonstrates compliance with the Commissions regulations for station blackout (§50.63).
§50.63(a)(1) requires that the nuclear power plant be able to recover from a station blackout. Clarify why switchyard systems are not relied on in safety analyses or plant evaluations to perform a function in the recovery from a station blackout. Also clarify why these offsite system components do not meet the scoping criteria of §54.4(a)(1), §54.4(a)(2) or §54.4(a)(3).
RAI 2.5-2 Section 2.5 of the LRA indicates that the Unit Main Power System and Nonsegregated-Phase bus in the 6.9 kV Normal Auxiliary Power System were found not to meet any of the scoping criteria of §54.4(a). Clarify why the Unit Main Power System and the Nonsegregated-Phase bus in the 6.9 kV Normal Auxiliary Power System are not relied on in safety analyses or plant evaluations to perform a function in the recovery from a station blackout. Also clarify why these offsite system components do not meet the scoping criteria of §54.4(a)(1),
§54.4(a)(2) or §54.4(a)(3).
RAI 2.5-3 Section 2.5 of the LRA indicates that non-insulated ground conductors were found not to meet any of the scoping criteria of §54.4(a). Non-insulated ground conductors provide safety-related electrical systems with the capability to withstand transient conditions (e.g., electrical faults). Clarify why this function does not meet the scoping criteria of §54.4(a)(1) and §54.4(a)(2).
3.6 Aging management of Electrical and Instrumentation and Controls RAI 3.6.1-1 Exposure of electrical cables to localized environments caused by heat or radiation can result in reduced insulation resistance (IR). Reduced IR causes an increase in leakage currents between conductors and from individual conductors to ground. A reduction in IR is a concern for circuits with sensitive, low-level signals such as radiation monitoring and nuclear instrumentation since it may contribute to inaccuracies in instrument loop. The applicant states that the Non-EQ Insulated Cables and Connections Aging Management Program includes non-EQ cables used in low-level signal application that are sensitive to reduction in insulation resistance such as radiation monitoring and nuclear instrumentation.
Further, the applicant states that the accessible non-EQ insulated cables installed in reactor buildings, auxiliary buildings and turbine building are visually inspected for cables jacket surface anomalies such as embrittlement, discoloration, cracking or surface contamination. Visual inspection may not be sufficient to detect aging degradation from heat and radiation in the instrumentation circuits with sensitive, low-level signal. Because low level signal instrumentation circuits may operate with signals that are normally in the
2 milliamp range or less, they can be affected by extremely low levels of leakage current. These low levels of leakage current may affect instrument loop accuracy before the adverse localized environment that caused them produces changes that are visually detectable. Routine calibration test performed as part of the plant surveillance test program can be used to identify the potential existence of this aging degradation. Provide a description of your plant calibration test program that will be relied upon as the aging management activity used to detect this aging degradation in sensitive, low level signal circuits, or provide the technical basis for excluding it.
B.3.19 Inaccessible Non-EQ Medium-voltage Cables Aging Management Program B.3.19-1 Periodic actions are taken to prevent cable from being exposed to significant moisture, such as inspecting for water collection in cable manholes and conduit, and draining water. These actions are considered as preventive actions.
Section B.3.19 of the LRA under topic heading Preventive Actions indicates no preventive actions are required as part of the Inaccessible Non-EQ Medium-Voltage Cables Aging Management Program (AMP). Explain why no preventive actions are required as part of the AMP.
B.3.19-2 Section B.3.19 of the LRA under topic heading Scope defines significant moisture as exposure to long-term (over a long period such as a few years),
continuous standing water. Similar words are used in Section 3.6.2 of the LRA.
The Oconee LRA defined significant moisture as exposure to moisture that lasts more than a few days. Explain why exposure to moisture over more than a few days, and up to a few years, is not significant.
Division of Regulatory Improvement Programs COVER PAGE DATE:
January 14, 2002
SUBJECT:
REQUEST FOR ADDITIONAL INFORMATION FOR THE REVIEW OF THE CATAWBA NUCLEAR STATION, UNITS 1 AND 2, AND MCGUIRE NUCLEAR STATION, UNITS 1 AND 2, LICENSE RENEWAL APPLICATION ORIGINATOR:
Rani Franovich SECRETARY:
S. Chey
!!!DRIP ROUTING LIST!!!
NAME DATE 1.
R. Franovich
/ /02 2.
E. Hylton 3.
P. T. Kuo
/ /02 4.
C. Grimes
/ /02 DOCUMENT NAME:
C:\\Program Files\\Adobe\\Acrobat 4.0\\PDF Output\\Duke RAI -
Electrical.wpd ADAMS ACCESSION NUMBER: ML DATE ENTERED: / /02 FORM 665 ATTACHED and filled out: YES NO COMMITMENT FORM ATTACHED: YES NO