ML18153A990
| ML18153A990 | |
| Person / Time | |
|---|---|
| Site: | Surry  |
| Issue date: | 06/30/1994 |
| From: | Ohanlon J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| 94-342, GL-92-01, GL-92-1, NUDOCS 9407070071 | |
| Download: ML18153A990 (2) | |
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VIRGINIA. ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261 June 30, 1994 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 GENERIC LETTER 92-01, REVISION 1 REACTOR VESSEL STRUCTURAL INTEGRITY REQUEST FOR ADDITIONAL INFORMATION Serial No.
NL&P/CGL Docket Nos.
License Nos.
.94-342 R1' 50-280 50-281 DPR-32 DPR-37 We have received your May 24, 1994 request for additional information for Surry Power Station Units 1 and 2 related to Generic Letter 92-01, Revision 1, regarding reactor vessel integrity. The information requested for Surry is verification of the NRC data base inputs, confirmation of the the plant-specific applicability of various B&WOG topical reports, and provision of additional data to demonstrate adequate upper shelf energy (USE) at end-of-life (EOL) for the nozzle belt to intermediate shell circumferential welds in the Surry Units 1 and 2 vessels.
Virginia Electric and Power Company is a participant in the Babcock & Wilcox Owners Group (B&WOG) Reactor Vessel Integrity Program for Surry Units 1 and 2.
The B&WOG Reactor Vessel Working Group (RVWG) utilities have received letters from the NRC staff requesting confirmation of the plant-specific applicability of various B&WOG topical reports to their plants. The B&WOG RVWG is comprised of ten utilities with sixteen plants.
To ensure consistency among the responses of the participating utilities, the RVWG utilities proposed the preparation of a generic response to the NRC requests for additional information. The feasibility of a generic response by the B&WOG was discussed by representatives of the B&WOG and Mr. J. R. Strosnider of the NRC staff.
Mr. Strosnider agreed that this was a reasonable approach and indicated that such an approach would not affect the NRC staff's overall schedule of planned actions. He did note, however, that it would be necessary to have a letter of response on. each docket which either includes or references the generic response.
9407070071 940630 PDR ADOCK 05000280 P
e In re~panse to the NRC request for Surry, the following information is provided.
Verification of the NRC data base inputs and confirmation of the plant-specific applicability to Surry of B&W topical reports BAW-2178P, Revision 1, dated December 1993, and BAW-2192P, Revision 0, dated February 1993 has been provided to the NRC by B&W report BAW-2222 (the B&WOG RVWG generic response). B&W report BAW-2222, which is entitled "Response to Closure Letters to NRC Generic Letter 92-01, Revision 1," dated June 1994, was transmitted to the NRC by B&WOG letter OG-94-1393, dated June 23, 1994.
Regarding the request for additional data to demonstrate adequate USE at EOL for the nozzle belt to intermediate shell circumferential welds in the Surry Units 1 and 2 vessels, reference is made to the Equivalent Margins Analyses documented in B&W topical reports BAW-2178P and BAW-2192P.
This information is referenced to demonstrate compliance with the requirements of 1 OCFR50 Appendix G (i.e., adequate USE) in lieu of the requested additional material properties data. The Surry Units 1 and 2 nozzle belt to intermediate shell circumferential welds and the Unit 2 intermediate to lower shell circumferential weld were manufactured by Rotterdam Dockyard Company. The NRC acceptance letters, both dated March 29, 1994, for B&W topical reports BAW-2178P and BAW-2192P confirm the applicability of the Equivalent Margins Analyses to these Rotterdam welds.
If you have questions regarding this information, please contact us.
Very truly yours, Qf.Of/~
J. P. O'Hanlon Senior Vice President - Nuclear cc:
U. S. Nuclear Regulatory Commission Region II 101 Marietta Street, N. W.
Suite 2900 Atlanta, Georgia 30323 Mr. M. W. Branch NRC Senior Resident Inspector Surry Power Station Mr. D. L. Howell, Program Manager Owners Group Projects B&W Nuclear Technologies 3315 Old Forest Road P. 0. Box 10935 Lynchburg, VA 24506