ML19318A900
| ML19318A900 | |
| Person / Time | |
|---|---|
| Site: | Calvert Cliffs  |
| Issue date: | 06/20/1980 |
| From: | Olson R BALTIMORE GAS & ELECTRIC CO. |
| To: | Clark R Office of Nuclear Reactor Regulation |
| References | |
| IEIN-79-04, IEIN-79-4, NUDOCS 8006240339 | |
| Download: ML19318A900 (2) | |
Text
__ _
BALTIMORE l
GAS AND ELECTRIC
,,,/
CHARLES CENTER. P.O. BOX 1475 BALTIMORE, MARYLAND 21203 June 20, 1980 ELECTRIC ENGINEERING DEPARTMENT Office of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commir-on Washington, D. C.
20555 Attn:
Mr. Robert A. Clark, Chief Operating Reactors Branch #3 Division of Licensing
Subject:
Calvert Cliffs Nuclear Power Plant Units Nos. 1 & 2, Dockets Nos. 50-317 & 50,-318 Adequacy of Station Electric Distribution Systems Voltages
Reference:
BG&E letter dated 10/8/79 from A. E. Lundvall, Jr.
to D. G. Eisenhut, same subject.
Gentlemen:
The referenced letter, which was submitted in response to an NRC letter dated August 8,1979 concerning IE Information Notice 79-Oh, provided the results of tests, analyses and calculations performed to
~
determine the adequacy of station voltages,.
In our letter we indicated that we would further verify the accuracy of those calculations by conducting voltage profile tests during full ESF testing.
These tests vere completed on November 30, 1979, and the results are attached for your information. These results confirm our calculatior.s.
Very truly yours, Y
/
R. C. L. Olson Principal Engineer
'CC:
J. A. Biddison, Esquire G. F. Trowbridge, Esquire Mr. E. L. Conner, Jr. - NRC O
7
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p Attachnent I Belou are voltage conditions on Enaineered Safety Feature (ESP) busses during' our ESF test on Nove :bar 30, 1979.
The figures shoun are measured bus voltages using the nominal bus voltage as a basis.
The switchyard voltage vas between.99 and 1.03 for this test.
Starting Running ESF Start Running Bus Bie Au=. Load W/Au=. Running Aux. and ESF Bus
. Volt No.'
Casa 1 Case 5 Case 6 3
4.18KY 21
.99
.909
.978 7
480V 21A 1.00
.829
.975 8
480V 21B 1.00
.829
.963 6
4 9
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e G
4 9 '
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