ML17212B226
| ML17212B226 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 11/30/1981 |
| From: | Clark R Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 8112220112 | |
| Download: ML17212B226 (4) | |
Text
Oa NOV ~ 0 t981 Docket No. 50-335 e
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LUCIE UNIT 1 Gray File R.
Dr. Robert E. Uhrig Vice President Advanced Systems 8 Technology Florida Power 8 Light Company P. 0.
Box 529100 Miami, Florida 33152
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Dear Dr. Uhrig:
SUBJECT:
DEGRADED GRID VOLTAGE-
'4i You stated in your letter of July 3, 1980, that the setpoints of the Westinghouse CV-2 voltage relays would be investigated fur ther and, upon completion of that investigation, revised Technical Specifications would be provided.
That investigation was to be completed in January 1981 per your letter of'eptember 12, 1980.
Please provide the.following information:
Relay voltage and time-delay setpoints with tolerances.
2.
Your basis for selecting these setpoints.
3c Proposed Technical Specifications, including LCO s and surveillance requirements, per our letter of June 3, 1977.
The NRC position requiring coincidence logic to prevent spurious tripping of any safety related power train from its offsite power source is not met by the design described in your letter of'ovember 9, 1979.
With your design a spurious actuation or failure of a single CV-2 undervoltage relay will cause the power source of one train to separate from its offsite source and be connected to its diesel generator.
This is not acceptable.
A suggested minimum way of meeting this position would be to provide two undervoltage relays per bus and to series-connect their normally-closed contacts.
A preferred method would be to utilize three relays per bus with their contacts connected for 2-out-of-3 coincident logic.
Please provide your revised design to meet our position.
You are requested to provide the information identified above within 45 days of the date of this letter.
The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents, therefore, OHB clearance is not required under P.L.96-511.
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See next pa Sincerely, Original signed by Robert A. Clark Robert A. Clark, Chief Operating Reactors Branch ¹3 Division of Licensing OFFICE/
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'RC FORM 310 (10-80) NRCM 0240 OFFiC/AL RECORD COPY USQPO: 1981~5-960
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Florida Power
& Light Compan'y CC:
Harold'F..Reis, Esquire Lowenstein,
- Newman, Reis 8 Alexrad 1025 Connecticut
- Avenue, N.W.
Washington, D. C.
20036 Norman A. Coll, Esquire McCarthy, Steel, Hector 8 Davis 14th Floor, First National Bank Building Miami Florida 33131 Indian Piver Junior College Library 3209 Virginia Avenue Fort.Pierce, Florida 33450 Mr. Jack Schreve Office of the Public Counsel.
Room 4, Holland Building Tallahassee, Florida 32304 Resident Inspector/St.
Lucie Nuclear Power Station c/o U.S.N.R.C.
P. 0, Box 400 Jensen Beach, Florida 33457 Administrator Department of Environmental Regulation Power Plant Siting Section State of Florida 2600 Blair Stone Road Tallahassee, Florida 32301 Mr. Weldon B. Lewis County Administrator St. Lucie County
.2300 Virginia Avenue, Room 104 For t Pierce, Florida 33450 U.S.
Enviro'nmental Protection Agency Region IY Office ATTN:
Regional Radiation Representative 3-"5 Courtland Street, N.E.
Atlanta, Georgia 30308 Bureau of Intergovernmental Relations 660 Apalachee Parkway' Tallahassee, Florida 32304 Mr. Charles B. Brinkman Manager - Washington Nuclear Operations C-E Power Systems Combustion Engineering, Inc.
, 4853 Cordell Avenue, Suite A-1 Be ihesda, Maryland 20014
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