ML18153B452
| ML18153B452 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 01/27/1994 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 93-814, 93-815, NUDOCS 9402030239 | |
| Download: ML18153B452 (3) | |
Text
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VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 January 27, 1994 United States Nuclear Regulatory Commission Attention: Document Control Desk Washington, D. C. 20555 Gentlemen:
VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SURRY POWER STATION UNITS 1 AND 2 Serial No.
93-814/
93-815 NL&P/CGL R3 Docket Nos.
50-338 50-339 50-280 50-281 License Nos. NPF-4 NPF-7 DPR-32 DPR-37 RESPONSE TO REQUEST FOR ADDITIONAL INFORMATION REGARDING THERMO-LAG FIRE BARRIERS By letters dated December 21, 1993, you requested additional information regarding Thermo-Lag applications at North Anna and Surry Power Stations. These letters indicated that Virginia Electric and Power Company planned to base operability determinations on the results of the industry test program being coordinated by the Nuclear Management and Resources Council (NUMARC). Our April 12, 1993, letter (Serial No.92-834) did not make such a statement. We have not and do not intend to base operability determinations on the NUMARC test program results. Our April 12, 1993 letter did, however, indicate that we were evaluating our Thermo-Lag applications and defining corrective actions, as appropriate. Those evaluations and actions have been completed. In our recent letter dated December 23, 1993 (Serial No. 92-834A), we supplemented our original response and provided identification of the actions taken to resolve the Thermo-Lag operability issue at both North Anna and Surry. Specifically, none of the methods of resolution are based on the results of the NUMARC test program.
To summarize the final resolution of the Thermo-Lag issue for North Anna and Surry (detailed in our December 23, 1993 letter), Thermo-Lag,has been replaced with other fire barriers in some applications and, for the remaining applications, engineering evaluations have been developed. These engineering evaluations demonstrate the
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adeqwacy of the Thermo-Lag applications that will remain in place.
In addition, compensatory measures will be maintained in two instances (i.e., related to the Surry communication system conduits and the North Anna exemption request addendum for the charging pump cubicle piping penetrations) until no longer required. We plan no further actions to address the Thermo-Lag issue for North Anna and Surry.
If you have questions regarding our final resolution of the Thermo-Lag issue for North Anna and Surry, please contact us.
Very truly yours, c~-
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W. L. Stewart Senior Vice President - Nuclear cc:
U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. R. D. Mcwhorter NRC Senior Resident Inspector North Anna Power Station Mr. M. W. Branch NRC Senior Resident Inspector Surry Power Station Mr. R. E. Bradley Nuclear Management and Resources Council 1776 Eye Street, NW Suite 300 Washington, DC 20006
e COMMONWEAL TH OF VIRGINIA )
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COUNTY OF HENRICO
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e The foregoing document was acknowledged before me, in and for the County and Commonwealth aforesaid, today by W. L. Stewart who is Senior Vice President -
Nuclear, of Virginia Electric and Power Company. He is duly authorized to execute and file the foregoing document in behalf of that Company, and the statements in the document are true to the best of his knowledge and belief.
Acknowledged before me this J27flday of c,m~,
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My Commission Expires: (.d1(1{ 3/
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Notary Public (SEAL)