ML17338B200
| ML17338B200 | |
| Person / Time | |
|---|---|
| Site: | Turkey Point  |
| Issue date: | 10/01/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 7910220338 | |
| Download: ML17338B200 (4) | |
Text
Docket Nos. 50-250 and 50-251 Dr. Robert E. Ubrig, Vice President gfgm
$8V 'itiipts~r Advanced Systems and Technology I'~< kVgp<(ff Pffft Florida 'Power and Light Company Post Office Box 529100 t'ii'ami, Fl orida 33152
Dear Dr. Uhrig:
RE:
TURKEY POINT PLANT, UNIT NOS.
3 AND 4 Me are currently reviewing the adequacy of.the offsite power systems of-'nuclear power plants and in particular, the loss of offsite power events at your facility.
One aspect of this.review concerns the history of experienced total and partial power outages and attendant degraded voltage or frequency conditions of the grid.
In our review of this matter we are drawing upon the information you provided in Licensee Event Reports
{LERs) and fol.lowup letters to the NRC.
Our review of a number. of these LERs indicates that loss of offsite power has occurred at your facility on April 3, 1973, April 4, 1973, April 25, 19?4, flay 16, 1977 and August 3, 1979.
In order. to complete our review of loss of offsite power events we require response to the enclosed request for information.
Me request that you provide your response within 90 days of the receipt of this letter.
Sincerely,
Enclosure:
Request for Information A. Schwencer, Chief Operating Reaqtors Branch gl Division of Operating Reactors 79I'OZZO338 PpPf.d OirislCCSte'UIINAMCW w/enclosur
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UNITED STATES NUCLEAR REGULATORY COMMISSION WASHINGTON, D. C. 20555 007 1 1979 F -~
Dr. Robert E. Uhrig, Vice President Advanced Systems and Technology Florida Power and Light Company Post Office Box 529100 hIiami, Florida 33152
Dear Dr. Uhrig:
RE:
TURKEY POINT PLANT, UNIT NOS ~
3 AND 4 He are currently reviewing the adequacy of the offsite power systems of nuclear power, plants and in particular, the loss of offsite power events at facilit.'.
One aspect of this review concerns the history of experienced a
your total and partial power outages and attendant degraded voltage or fre uenc conditions of the grid.
In our review of this matter we are drawing upon the information you provided in Licensee Event Reports (LERs) and followup letters to the NRC.
Our review of a number of these LERs indicates that, loss of offsite power has occurred at your facility on April 3, 1973, ApriI 4, 1973, April 25,
- 1974, tray 16, 1977 and August 3, 1979.
In order to complete our review of loss of offsite power events we require response to the enclosed
. request for information.
Me request that you provide your response within 90 days of the recei t of this letter.
e receip Si neer el y,
Enclosure:
Request for Information cc:
wlencl osure See next page A. Schwencer, Chief Operating Reactors Branch 81 Division of Operating Reactors 92 02'~
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Robe. t =. Uhri g Florida Power and Light Company CC:
Mr. Robert Lowenstein, Esquire Lowenstein,
- Newman, Reis and Axel rad 1025 Connecticut
- Avenue, N.M.
Sui te 1214 washington, D. C.
20036 Environmental and Urban Affairs Library Fl orida international Universi ty tliami, Florida 33199 Mr. Norman A. Coll, Esquire
- Steel, Hector and Davis 1400 Southeast First National Bank Building lliami, Florida 33131 Mr. Henry Yaeger, Plant Manager Turkey Point Plant Florida Power and Light Company P.
0.
Box 013100 Miami, Florida 33101 Mr. Jack Shreve Of,ice of the Public Counsel Room 4, Holland Builaing Tallahassee, Florida 32304
ATTACHMENT For losses 0, offsite power where less than aII o fsite power was los:
1.
How many circuits to the of site network are normally available and how many were lost during the event?
2.
What was the cause of the event?
3.
Wny did the other lines not fail when some did 'ail?
4.
Was any voltage increase or decrease experier.; ed just prior to or during the outage?
I so, please give details, voltag s leached, affects, etc.
5.
Was any frequency decay experienced just prior to or during the outage?
so, please give details, lowest frequency reached, decay rate, a,-,ec,s on equipment operation, etc.
6.
How long'was power unavailable from the circuit?
7.
Da.e of Event.
For losses of all offsite power:
l.
How long was the power off?
How long for partial recovery?
Please give detai
- 2. If turbine trip occurred, how soon after di.d loss of ofjsite power occur?
- 3. If power was recovered promptly (10 minutes or less},
was jt due to automaic or manual actions?
4.
Was any voltage increase or decrease experienced just prior to or during the outage?
If so, please give details, voltages reached, affect, etc.
5.
Was any frequency decay experienced just prior to or during the outage?
if so, please give details, lowest frequency
- reached, decay rate, affects on equipment operation, etc.
6.
Date of Event.
W re there any other loss of offsite power events other than we have listed?
Lf so, please give details of each even-'.