ML18152B358
| ML18152B358 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 10/14/1999 |
| From: | Christian D VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 50-280-98-201, 50-281-98-201, 98-300C, NUDOCS 9910290193 | |
| Download: ML18152B358 (2) | |
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 October 14, 1999 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY SURRY POWER STATION UNITS 1 AND 2 RESPONSE TO SURRY PLANT DESIGN INSPECTION Serial No.
NL&OS/SLW
- Docket Nos.
License Nos.
NRC INSPECTION REPORT NOS. 50-280/98-201 AND 50-281/98-201 INSPECTION ITEM 98-201-20, UNQUALIFIED COATINGS 98-300C R1' 50-280 50-281 DPR-32 DPR-37 In letter Serial No.98-300 dated July 9, 1998, Virginia Power provided a preliminary scope of work to address design inspection item 9.8-201-20. As part of that scope, Virginia Power performed an initial assessment of coatings inside containment at the Surry Power Station.
The evaluation clarified the licensing basis for coatings, established coating debris zones of influence, identified quantities and locations of unqualified or indeterminate coatings for the significant majority of items within the zones of influence, and evaluated the impact of coating debris on NPSH margin and sump performance.
Additionally, visual inspections were completed on accessible coatings inside containment for both Units 1 and 2.
The assessments of zones of influence and impact of coating debris on NPSH margin and sump performance are considered preliminary. The need for further analysis will be assessed following the additional guidance that is expected as a result of the ongoing research being done by the NRG Office of Research on inside containment coating.
As an interim and conservative measure, Virginia Power elected to encapsulate,
- repair, or remove degraded coatings identified during the visual inspections that are within the area of concern surrounding the containment sump. In addition, Virginia Power completed a self-assessment of its nuclear coatings program.
Enhancements identified in the self-assessment are being implemented to strengthen the control and maintenance of qualified coatings. Upon issuance of further guidance from the NRG, Virginia Power will perform any additional evaluations that are required.
Very truly yours, David A. Christian Vice President - Nuclear Operations 9910290193 991014 PDR ADOCK 05000280 G
PDR I
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cc:
US Nuclear Regulatory Commission Region II Atlanta Federal Center 61 Forsyth Street, S.W., Suite 23T85 Atlanta, Georgia 30303 Mr. R. A. Musser NRC Senior Resident Inspector Surry Power Station