ML20125B590
| ML20125B590 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 12/03/1992 |
| From: | Berkow H Office of Nuclear Reactor Regulation |
| To: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| Shared Package | |
| ML20125B592 | List: |
| References | |
| TAC-M84103, TAC-M84458, TAC-M84487, NUDOCS 9212100072 | |
| Download: ML20125B590 (4) | |
Text
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UNITED STATES g
NUCLEAR REGULATORY COMMISSION I
r, WASHINGTON, D. C. 20555
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December 3, 1992 Docket Nos. 50-338 and 50-339 Mr. W. L, Stewart Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060
Dear Mr. Stewart:
SUBJECT:
NORTH ANNA POWER STATION, UNITS NO. 1 AND NO. 2 (NA-1&2)
EXEMPTION FROM REQUIREMENTS OF 10 CFR PART 50, APPENDIX A, GENERAL DESIGN CRITERION-2 FOR NA-1&2 (TAC N05.
M84103 AND M84458) AND EXEMPTION FROM REQUIREMENTS OF 10 CFR 50.49. ENVIRONMENTAL QUALIFICATION OF ELECTRIC EQUIPMENT IMPORTANT TO SAFETY FOR NUCLEAR POWER PLANTS FOR NA-2 (TAC NO. M84487)
The Commission has issued the enclosed exemptions from the requirements of 10 CFR Part 50, Appendix A, General Design Criterion-2 (GDC-2), for NA-1&2, and from the requirements of 10 CFR 50.49, Environmental Qualification of Electric Equipment Important to Safety for Nuclear Power Plants, for NA-2.
The Virginia Electric and Power Company (VEPCO) plans to perform refurbishment activities for restoration of certain portions of the service water system (SWS) at NA-1&2 during the forthcoming NA-1 steam generator replacement program (SGRP).
Implementation of the SWS repair and replacement program requires removing the surrounding earth and/or concrete encasement of certain portions of normally buried SW headers. As a result, the normal design basis protection against natural phenomena afforded by earth and concrete encasement will temporarily be removed from certain SW components. Therefore, pursuant to 10 CFR 50.12(a), VEPC0 has requested a temporary exemption from the requirements of 10 CFR Part 50, Appendix A, GDC-2, for NA-1&2 during the Phase 1, Stage 1 SWS restoration activities.
Based on the current NA-1 SGRP outage schedule, VEPC0 has requested that the GDC-2 exemption period be from December 1, 1992 until June 30, 1993.
A1:0, during most of the Phase 1 stage of the SW restoration project, it will be necessary i.o isolate SW from the NA-1 control room chillers.
VEPC0 plans to provide a temporary water supply and return path to the NA-1 control room chillers from the common bearing cooling water system to provide normal control rnom temperatures and provide a reliable backup cooling system to the NA-2 air conditioning chillers. However, this will affect the normal environmental qualification design basis for the NA-2 control room chillers.
Therefore, pursuant to 10 CFR 50.12(a), VEPCO has requested a tem;mrary exemption from the requirements of 10 CFR 50.49, Environmental Qualification 9212100072 921203 DR ADOCK 05000338
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Mr. W. L. Stewart December 3, 1992 of Electric Equipment important to Safety for Nuclear Power Plants, for NA-2 for approximately the duration of the NA-1 SGRP outage.
The staff notes that Phase 1 Stage I of the SW restoration project is not in conformance with NRC guidance in Generic Letter 91-18, "Information to Licensees Regarding Two NRC Inspection Manual Sections on Resolution of Degraded and Nonconforming Conditions and on Operability," relative to performance of on-line preventive maintenance in that you plan repeated entering and exiting of LC0 action statements.
You have been made aware of the staff's concerns and have planned adequate compensatory measures and taken other steps to minimize risks.
A safety evaluation supporting the above exemptions is also enclosed. Also, a copy of the exemptions is being forwarded to the Office of Federal R2gister for publication.
Sincerely, (Original Signed By)
Herbert N. Berkow, Director Project Directorate 11-2 Division of Reactor Projects 1/11 Office of Nuclear Reactor Regulation
Enclosures:
- 1. Exemptions
- 2. Safety Evaluation cc w/ enclosures:
See next page J
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My NAME ATHADANI for DATE 12/ 2/92 W
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e Mr. W. L. Stewart North Anna Power Station
--Virginia Electric & Power Company Units-1.and 2 CC:
'l Mr. William C. Porter, Jr.
Robert B. Strobe, M.D.. M.P.H.
I County Administrator State Health Commissioner J
Louisa County-Office of the Commissioner
' l P.O. Box 160 Virginia Department of Health Louisa, Virginia 23093 P.O. Box 2448 Richmond, Virginia-23218-Michael W. Maupin, Esq.
Hunton and Williams Regional Administrator,-RII.
Riverfront Plaza, East Tower U.S. Nuclear Regulatory Commission.
951 E. Dyrd Street 101 Marietta Street, N.W., Suite 2900-Richmond, Virginia 23219 Atlanta, Georgia 30323 Dr. W. T. Lough Virginia State Corporation Commission Mr. G. E. Kane, Manager Division of Energy Regulation North Anna Power Station P.O. Box 1197 P.O. Box 402 Richmond, Virginia 23209 Mineral, Virginia 23117-Old Dominion Electric Cooperative 4201 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. M. L. Bowling, Manager-Nuclear Licensing & Programs Virginia Electric and Power Company Innsbrook Technical Center 5000 Dominion Blvd.
Glen Allen, Virginia 23060 Office of the Attorney General Supreme Court Building 101 North 8th-Street Richmond, Virginia 23219 Senior Resident Insh, er North Anna Power Sta. ion U.S. Nuclear Regulatory Commission
' Route 2,' Box 78 Mineral, Virginia 231172 1
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Memorandum Dated December 3, 1992 Distribution
" Docket:F1le NRC & Local PDRs PD# 11-2 Reading T. Murley/F. Miraglia J. Partlow B. Grimes J. Lieberman S. Varga G. Lainas
OPA OC/LFDCB L. Plisco, EDO E. Merschoff, R-!!
M. Sinkule, R-Il Senior Resident inspector, North Anna A. Thadani W. Beckner C. McCracken
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