ML20236T118
| ML20236T118 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 11/23/1987 |
| From: | Stewart W VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| To: | NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM) |
| References | |
| 87-520A, IEB-85-003, IEB-85-3, NUDOCS 8712010025 | |
| Download: ML20236T118 (2) | |
Text
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l VINGINTA ELECTRIC AND POWER COMPANY j
Hrcuxoxn,VinoinxA uneet W. L. STuwAar l
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November 23, 1987 l
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United States Nuclear Regulatory Commission Serial No.
87-520A Attention:
Document ~ Control Desk N0/RCB:jmj Washington, D.C.
20555 Docket Nos.
50-338 50-339 License Nos. NPF-4 NPF-7 i
Gentlemen:
I VIRGINIA ELECTRIC AND POWER COMPANY NORTH ANNA POWER STATION UNITS 1 AND 2 SUPPLEMENTAL RESPONSE TO THE REQUEST FOR ADDITIONAL INFORMATION REGARDING IEB 85-03 By our letter Serial No.87-520 dated September 18, 1987, Virginia Electric and Power Company provided additional information concerning IEB-85-03, " Motor Operated Valve Common Mode Failures During Plant Transients Due to Improper Switch Settings."
In subparagraph (b) of our response to NRC Comment 2, we committed to revising Attachment II to our October 17, 1986 response to IEB 85-03. The revised table is attached.
If you have any further questions, please contact us.
Very truly yours, h
h/t(b W. L. S art Attachment cc:
U. S. Nuclear Regulatory Commission 101 Marietta Street, N.W.
Suite 2900 Atlanta, GA 30323 Mr. J. L. Caldwell NRC Senior Resident Inspector North Anna Power Station 8712010025 871123 l
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DR ADDCK 050 8
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ATTACMENT MAXIMUM DIFFERENTIAL PRESSURE SUPMARY NORTH ANNA UNITS 1 AND 2 Design Valve Valve Function Basis d/o 1115B, D RWST to high-head SI pump isolation 36 psi 21158, D 36 psi 11150, E VCT to charging pump isolation 80 psi 21150, E 80 psi 1267A, B' Low-h'ead S1 to high-head SI isolation 180 psi 2267A, B 180 psi 1269A, B 180 psi 2269A, B 180 psi 1270A, B 180 psi 2270A, B 180 psi 1286A, B, C Charging pump to normal charging 2740 psi 2286A, B, C isolation 2740 psi 1289A, B Charging pump to normal charging 2636 psi 2289A, B isolation 2636 psi 1867A, B, C, D High-head SI to cold leg isolation 2636 psi 2867A, B, C, D 2636 psi FW-100B, D Auxiliary steam generator feedwater-1406 psi FW-2008, D pump to steam generator 1406 psi 1275A, B, C Charging pump recirculation to seal open-close water heat exchanger 2297 psi close-open 2737 psi 2275A, B, C open-close 2297 psi close-open 2737 psi 1373 2740 psi 2373 2740 psi 87-520A
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