ML18152B361
| ML18152B361 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 08/23/1999 |
| From: | Edison G NRC (Affiliation Not Assigned) |
| To: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| Shared Package | |
| ML18152B362 | List: |
| References | |
| GL-97-05, TAC-MA0501, TAC-MA0502, NUDOCS 9908300113 | |
| Download: ML18152B361 (4) | |
Text
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UNITED JTA"f ~S 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, Virginia 23060 August 23, 1999
SUBJECT:
CLOSURE OF REVIEW OF RESPONSE TO GENERIC LETTER 97-05, "STEAM GENERATOR TUBE INSPECTION TECHNIQUES" FOR THE SURRY POWER STATION, UNITS 1 AND 2 (TAC NOS. MA0501 AND MA0502)
Dear Mr. O'Hanlon:
The purpose of this letter is to provide our completed evaluation of your response to the subject generic letter, and to inform you we have closed the issue.
The NRC issued Generic Letter (GL) 97-05, "Steam Gener2.tor Tube l.r,spection Techniques,"
on December 17, 1997. The focus of GL 97-05 was to verify that licensees' steam generator (SG) tube inspection practices were consistent with regulatory reciuirements and plant licensing bases. Virginia Electric and Power Company (VEPCO) has provided the NRC with information regarding the inspection techniques used at Surry Power Station, Units 1 and 2, in submittals dated March 17, and September 10, 1998, during phone calls on October 28, 1998 and April 28, 1999, and in a submittal dated May 17, 1999. According to information provided by VEPCO, two types of SG tube degradation are dispositioned by sizing the through-wall depth at Surry Power Station, anti-vibration bar (AVB) wear and pit indications. Only the Surry Unit 2 SG tubes are believed to be affected by pitting at this time.
We have completed our review of your response to GL 97-05. The enclosure provides the staff's assessment of the inspection techniques used to size SG tube degradation at Surry Units 1 and 2. We have concluded that VEPCO had an inadequate technical basis for assuming that suspected pit indications contained in four tubes in the Surry Unit 2 SGs were representative of actual pitting prior to the 1999 refueling outage. Therefore, the application of a pitting sizing technique to estimate the depth of these indications was inappropriate.
However, all tubes with known pit-like indications were plugged in the most recent Unit 2 outage. We commend VEPCO for taking these steps to ensure integrity of the reactor coolant pressure boundary. The staff did not identify any concerns with the licensee's approach for dispositioning tubes with AVB wear indications.
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J. P. O'Hanlon This closes the staff's efforts in regard to TAC Nos. MA0501 AND MA0502. The staff appreciates your efforts in regard to this matter.
Sincerely, Original signed by:
Gordon E. Edison, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear Reactor Regulation Docket Nos. 50-280 and 50-281
Enclosure:
As stated cc w/encl: See next page Distribution:
Docket File PUBLIC PDll-1 Reading PRush EDunnington OGC GEdison ACRS RScholl(SE)
COgle, RII DOCUMENT NAME:
G:\\PDll-1\\SURRY\\Ma0501.wpd To receive a copy of this document, indicate in the box C=Copy w/o attachment/enclosure E=Copy with attachment/enclosure N = No co OFFICE PDll-1/PM PDll-2/LA E NAME DATE (1~ /99 OFFICIAL RECORD COPY
e J. P., O'Hanlon This closes the staff's efforts in regard to TAC Nos. MA0501 AND MA0502. The staff appreciates your efforts in rega,*d to this matter.
Docket Nos. 50-280 and 50-281
Enclosure:
As stated cc w/encl: See next page Sincerely, Gordon E. Edison, Senior Project Manager, Section 1 Project Directorate II Division of Licensing Project Management Office of Nuclear rleactor Regulation
Mr. J. P. O'Hanlon
- Virginia Electric and Power Company C"'
Mr. Donald P. Irwin, Esq.
Hunton and Williams Riverfront Plaza, East Tower 951 E. Byrd Street Richmond, Virginia 23219 Mr. E. S. Grecheck Site Vice President 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 Robert B. 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 SOC-') Dominion Blvd.
Glen Allen, Virginia 23060 Mr. W. R. Matthews Site Vice President North Anna Power Station Virginia Electric and Power Company P. 0. Box 402 Mineral, Virginia 23117