ML19309G463
| ML19309G463 | |
| Person / Time | |
|---|---|
| Site: | Haddam Neck File:Connecticut Yankee Atomic Power Co icon.png |
| Issue date: | 04/18/1980 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Counsil W CONNECTICUT YANKEE ATOMIC POWER CO. |
| References | |
| TASK-08-01.A, TASK-8-1.A, TASK-RR NUDOCS 8005070003 | |
| Download: ML19309G463 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION
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April 18,1980 Docket tio. 50-213 f!r. W. G. Counsil fluclear Engineering and Operations Connecticut Yankee Atomic Power Company Pest Office Sox 270 Hartford, Connecticut 06101
Dear !!r. Counsil:
You are requested to provide the information specified in the enclosure to this letter regarding degraded grid voltages on emergency power system for your facility. A copy of the enclosure was telecopied to you on April 14,1920.
Receipt of your response is requested by May 5, 1980.
i Sincerely, i
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j Dennis L. Ziemann, Chief
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Operating Reactors Branch h2 Division of Operating Reactors
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Encicsu e: As stated cc w/sr.:losure:
See next page 4
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Mr. W. G. Counsil April 18, 1980 CC Day, Berry & Howard U. S. Environmental Protection Counselors at Law Agency One Constitution Plaza Region I Office Hartford, Connecticut 06103 ATTN:
EIS COORDINATOR JFK Federal Building 1
Superintendent Boston, Massachusetts 02203 Haddam Neck Plant RF0 #1 Post Office Box 127E East Hampton, Connecticut 06:24 Mr. James R. Himmelwright Northeast Utilitics Scryica C;mpany P. O. Box 270 Hartforc, Connecticut 06101 Russell Library 119 Broad Street Middletown, Connecticut 06467 Soard of Selectmen Town Hall Haddam, Connecticut 06103 Connecticut Energy Agency ATTN:
Assistant Director Research and Policy Development Department of Planning and Energy Policy 20 Grand Street Hartford, Connecticut 06106 Director, Technical Assessment Division Office of Radiation Programs (AW 459)
U. S. Environmental Protection Agency Crystal Mall 72 Arlington, Virginia 20460
ENCLOS!!RE m
i REC'!EST FOR ADDITI0f'AL IflFORMATION FA03AM f!ECK ;UCLEAR POWER PLANT DEGRADED GRID VOLTAG_E, E
?.efere ce 1:
C:nnecticut Yankee Atomic Power Company (D.C. Switzer) letter to the f;RC (L Schwencer), dated July 21, 1977 Oefe ec.ce 2: "RC (A. Schwencer) letter to Connecticut Yankee Atomic Power Company (D.C. Switzer), dated June 3,1977 2.efe e ce 3: Connecticut Yankee Atomic -Power Company (W.G. Counsil) to the fiRC (D.L. Ziemann), dated September 24, 1979 4
Ref. 3, page 2, paragraph A2 states that Haddam fleck may have in operation certiir. ESF notors and equipment during various modes of plant operation.
Ref.
1 states that these motors will automatically be protected from degraded volt-age On:y if there is a LOCA (page 2, paragraph 3).
This means that there is no auto a:ic crotection from degraced voltage on certain ESF equipment during other modes Of operation until the voltage degrades below 2870 volts (69% of 4160V) at vi:n time the loss of voltage protection scheme would disconnect the Class 15 b. sis.
R=f. I and 3 sr.:w only manual operation for protection of ESF equia-ent f cm the degraded voltages between 93% and 69% of 4160V during all modes or operation ex:ect LOCA.
Ques-i:n:
?.ef. 2 - Position 1 requires that all Class IE equipment must be automatically
- r:tec ed frc: a degraded voltage condition. Please e nlain how the Haddam
- le-k Flant can meet this requirement with respect to ESF equipment which may
l-
.