ML19351G496
| ML19351G496 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 02/03/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Lundvall A BALTIMORE GAS & ELECTRIC CO. |
| References | |
| NUDOCS 8102240032 | |
| Download: ML19351G496 (3) | |
Text
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UNITED STATES NUCLEAR REGULATORY COMMISSION g
W ASHINGTON, D. C. 20555 j
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February 3, 1981 4
ocket Nos. 50-317 and 50-318 s
2 FEB j Vice President - Supply
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Mr. A. E. Lundvall, Jr.
4 Baltimore Gas & Electric Company
'S P. O. Box 1475 6
Baltimore, Maryland 21203
Dear Mr. Lundvall:
In the process of reviewing your letter dated October 8,1979 on Adequac; of Station Electric Distribution System Voltages, we find that additional information as detailed in the enclosure is needed to complete our review.
Please provide the additional information within 45 days of receipt of this letter.
Sincerely, f Lf "a
Robert A. Clark, Cni f Operating Reactors Branch #3 Division of-Licensing
Enclosure:
As stated cc: See next page l
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82 0224o on
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i Baltimera Gas and Electric Comp'any ec:
Jar.es A. Biddison, Jr.
Mr. Bernard Fowler General Counsel President, Board of County G and E Building Commissioners Charles Center Prince Frederick, Maryland 20768 21203 Baltimore, liaryland~
DLrecter, Criteria and Standards Divisic-George F. Trowbridge, Esquire Cffice cf Radiatic: P og a=s (AE-460)
Shaw, Pittnan, Potts and U.S. Dr.ir0= ental Prctec.icn Agency irowbridge Washirgton, D.C.
20L60 1800 M Street, N.W.
Washington, D. C.
20035 U. S. Enviromental Protection Acenc~y Region III Office Mr. R. C. L. Olson N.
US COMDI N Baltimore Gas and Electric Company Roo 922 - G and E Buildino
{urtis Building (Sixth Floor)
.ixth and Walnut Streets Post Of fice Box 1475 Philadelphia, Pennsylvania 19106 Bal:1 mere, Maryland 21203 Mr. Leon B. Russell Ralph E. Architzel Plant Superintendent Resident Reactor liispector Calvert Cliffs Nuclear Power Plant NRC Inspection and Enforcement P. O. Sex 437 Baltimore Gas & Electric Company Lt:sby, Maryland 20557 Lusby, Maryland 20557
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Sghtel Power Corocration Mr. Charles B. Brinkman Manager - Washington Nuclear Chief N lear Engineer Operations 15740 Snacy Grove Roac
{cn "E g ering, Inc.
r Gaithersberc, !!aryland 2076C
,3 fB53CordellAve.,SuiteA-1 Co.sustion Engineerine, In:.
cethesda, Maryland 2001, ATit: Mr. P. W. Kruse, tianager Engineering Services l
Post Office Box 500 Windsor, Connecticut 06095 Calvert County Library l
Prince Frederick, Maryland 20678 l
Director, Department of Sta'e Planning 301 West Preston Street l
l Baltin re, Maryland 21201 Mr. R. M. Douglass,11anager Quality Assurance Department Administrator, Power Plant Siting Program Recm 923 Gas & Electric Building Energy and Coastal Zone Administration i
P. O. Box 1475 Department of Natural Resources i
Baltimore, Maryland 21203 Tawes State Office Building l
Annapolis, Maryland 21204 l
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ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION CALVERT CLIFFS NUCLEAR POWER PLANT Units 1 and 2 DOCKET NO. 50-317 and 50-318 Reference 1: NRC letter (W. Gammill) to all Power Rer.etor Licensees, dated August 8, 1979.
Reference 2:
Baltimore Gas and Electric Company letter ( A. E. Lundvall) to the NRC (D.C. Eisenhut), dated October 8,1979.
Reference 3:
Baltimore Gas and Electric Company letter (A. E. Lundvall) to the NRC (D. L. Zieman), dated September 15, 1976 1.
The voltage analysis submitted in Ref. 2 was performed using both service transformers (P-13000-1 and P-13000-2) supplying the Class 1E buses.
Ref. I requests that an analysis be completed for the worst case. Submit an analysis assuming only one service transformer is in service prior to an accident (Guideline 2, Ref. 1).
Af ter the transients of the emergency loading, calculations showing the effect of starting a large non-safety load should be made (Guideline 3, Ref.1).
Also, confirm that the second-level of undervoltage protection relays will not give a sourious trip for this condition.
2.
Ref. 2 provided calculations and tests for 4160 volt buses and 480 volt buses. Submit calculated voltages for all low-voltage AC (less than 480 volts) Class lE buses or distribution terminals or document that all low-voltage AC Class 1E equipment will be operating within their required voltage ratings for each case analyzed.
Do these buses supply any instru-ments or control circuits required by GDC-13? If so, is all equipment capable of sustaining the analyzed voltages without blowing fuses, over-heating, etc., and without affecting the equipment's ' ability to perform the required function.
3.
Ref. 3, Enclosure 1, page 1 refers to " safety related" buses 4160-14, 480-14A, and 480-14B. Are these buses Class 1E supplying Class 1E equip-ment? If so, submit an analysis for these buses and equipment as sub-mitted for buses 11, 11A, and 11B.
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