ML18152B786
| ML18152B786 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 04/28/1998 |
| From: | Kuo P NRC (Affiliation Not Assigned) |
| To: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| Shared Package | |
| ML18152B787 | List: |
| References | |
| TAC-MA1277, NUDOCS 9805040085 | |
| Download: ML18152B786 (3) | |
Text
.,.
- UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D.C. 20555--0001 Mr. J. P. O'Hanlon Senior Vice President - Nuclear Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, VA 23060 April 28, 1998
SUBJECT:
SURRY POWER STATION, UNIT 1-ASME SECTION XI RESIDUAL HEAT REMOVAL SYSTEM PRESSURE BOUNDARY LEAKAGE RELIEF REQUEST 98-177 (TAC NO. MA1277)
Dear Mr. O'Hanlon:
This letter grants relief from the American Society of Mechanical Engineers (ASME) Boiler and Pressure Vessel Code Section XI requirements as you requested in your March 23, 1998, relief request 98-177 related to residual heat removal (RHR) system pressure boundary leakage.
This relief allows you to determine RHR system operability having considered the identified through-wall piping leakage.
Your letter indicated that on March 22, 1998, with Unit 1 in an 8-day maintenance outage, plant staff detected minor leakage on the Unit 1 RHR Class 2 piping. The leak was located downstream of the RHR heat exchanger discharge and bypass piping in the common return header that feeds both Loop B and C reactor coolant system (RCS) cold legs. The piping did riot meet ASME Code acceptance criteria due to the through-wall leakage, and you declared the system inoperable.
Pursuant to 10 CFR 50.55a(a)(3)(ii), you requested a one-time schedule relief from ASME Section XI pressure boundary leakage corrective action and flaw evaluation requirements as described in the enclosed Safety Evaluation.
Based on our evaluation, we conclude that compliance with the specified ASME Section XI requirements would result in hardship or unusual difficulty without a compensating increase in
. the level of quality and safety. Therefore, pursuant to 10 CFR 50.55a(a)(3)(ii), your proposed alternatives are authorized until you repair or replace the RHR piping and place it in service prior to the unit exceeding 350 degrees and 450 psig during the maintenance outage startup.
The proposed alternatives to an immediate Code repair incorporate alternative flaw evaluation methods and acceptance criteria and a visual examination of the leak location once per day prior to the repair or replacement to monitor for any changes in leakage that would require immediate attention during the shutdown condition.
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J. O'Hanlon The staffs evaluation and conclusions are contained in the enclosed Safety Evaluation. The staff has completed its evaluation of this matter and we are, therefore, closing TAC No.
MA1277.
Docket No. 50-280
Enclosure:
Safety Evaluation Distribution
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PUBLIC PDll-1 RF J. Zwolinski T. Harris (E. Mail TLH3 SE only)
OGG G. Hill (4)
ACRS M. Gamberoni L. Plisco, RII J. Hornseth J. Fair FILENAME-G:\\SURRY.REL OFFICE NAME DATE COPY
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Sincerely, (Original Signed By)
P. T. Kuo, Acting Director Project Directorate 11-1 Division of Reactor Projects - 1/11 Office of Nuclear Reactor Regulation 4/,?'/198 Yes/No Yes/No
e Mr. J. P. O'Hanlon Virginia Electric and Power Company cc:
Mr. Michael W. Maupin, Esq.
Hunton and Williams Riverfront Plaza, East Tower 951. E. Byrd Street Richmond, Virginia 23219 Mr. David Christian, Manager Surry Power Station
- Virginia Electric and Power Company 5570 Hog Island Road Surry, Virginia 23883 Senior Resident Inspector Surry Power Station U. S. Nuclear Regulatory Commission 5850 Hog Island Road Surry, Virginia 23883 Chairman Board of Supervisors of Surry County Surry County Courthouse Surry, Virginia 23683 Dr. W. T. Lough Virginia State Corporation Commission Division of Energy Regulation P. 0. Box 1197 Richmond, Virginia 23209 Regional Administrator, Region II U. S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth Street, SW, Suite 23T85 Atlanta, Georgia 30303 Robert 8. Strobe, M.D., M.P.H.
State Health Commissioner Office of the Commissioner Virginia Department of Health P.O. Box 2448 Richmond, Virginia 23218 Surry Power Station Office of the Attorney General Commonwealth of Virginia 900 East Main Street Richmond, Virginia 23219 Mr. J. H. McCarthy, Manager Nuclear Licensing & Operations
- -Support-*
Innsbrook Technical Center Virginia Electric and Power Company 5000 Dominion Blvd.
Glen Allen, Virginia 23060 Mr. R. C. Haag U.S. Nuclear Regulatory Commission Atlanta Federal Center 61 Forsyth St., SW, Suite 23T85 Atlanta, Georgia 30303 Mr. W. R. Matthews, Manager North Anna Power Station P. 0. Box 402 Mineral, Virginia 23117