ML17207A516
| ML17207A516 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 10/17/1979 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Robert E. Uhrig FLORIDA POWER & LIGHT CO. |
| References | |
| NUDOCS 7911020197 | |
| Download: ML17207A516 (6) | |
Text
distribution;
~eeRet File NRC PDR L PDR ORB84 Rdg NRR Rdg DEisenhut RVollmer NGammill LShao JRMiller BGrimes 2 TJCaf ter llRussell RReid PErickson RIngram OELD Xaa I8E (2)
OCTOBER 1 7 1979 ACRS (16)
TERA JRBuchanan
~ray File (1)
Docket t@. 50-335 Dr. Robert E. Uhrig Vice President floÃda Pnwer 8 Light Company l,A'dvanced %Systems 5 Technology P. 0. Box 529100 hfami, Florida 33152 In our review of this matter Qe have drawn upon the information provided to us via Licensee Event Reports and followup 'letters which you have sent to us.
Our review of these reports indicated that loss of offs$te power events have occurred at St. Lucre Plant, Unit No.
1 on tray 16, 'l977 and Ny 14, 1978.
In order to complete our review of 'toss of offsite power events we require additional Information.
Thfs information should be provided to us
$ n the form of answers to the questions listed
$ n the
,~nclosuro.
/
Please provide your response to the enclosed questions f'r the St. Lucre P'lant, Unit 1'lo.
1 + HRC within 90 days of'he receipt of this 'letter.
Sincerely, Origlnel sigqeg by Robert W, Retd Robert H. Reid, Chief Operating Peactors Branch 5'4 Division of Operating Reactors Dear Or Uhrig:
He are currently reviewing the adequacy of the offs$te power systems Ice nucleaf power plants and
$ n parNcular, the loss of offs$te power events at your facility.
Gne aspect of th$ s review concerns the h4;story of expefienced total and paf teal power outages and attendent degraded vo'ltage or frequency conditions of the grid.
Enclosuf e:
Request for hddkC)onal Infoation cc w/enclosure See next page jlpp
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SURNAME DATE)
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+U.S. GOVERNMENT'RINTINGOFI=ICE: 1979.289.389
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~r UNITED STATES NUCLEAR REGULATORY COMMISS ION WASHINGTON, O. C. 20555 October 17, 1979 Docket Ho.
50-335 Dr. Robert E, Uhrio Vice President Florida Power K Light Company Advanced Systems I! Technology P. 0.
Box 529100 tliani, Florida 33152
Dear Dr,
Uhrig:
Me are currently reviewing the adequacy of the offsite pow r 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 attendent degraded voltage or frequency -conditions of the grid, In our review of this matter we have drawn upon the in ormation provided to us via Licensee Event Reports and followup letters which you have sent'o us, Our review of these reports indicated that loss of offsite power events have occurred at St. Lucie Plant, Unit !~o.
1 on Yay ')6, 1977 and Yiay 14,
- 1978, In order to complete our review of loss of offsite power
'vents we require additional information, This information should be
,provided to us in the form of answers to the questions listed in the enclosure.
Please provide your response to the enclosed questions for the St.
Lucie Plant, Unit Ro.
1 to NRC within 90 days of the receipt of this letter.
Sincerely, Enclosur Request for Additional Information Robert H. Reid, Chief Opera.ing Peactors Branch
-;.4 Division of Operating Reactors cc v'/enclosure See next page
\\
Florida Power h
~ ght ComPany.
CC:
Robert Lowenstein, Esquire Lowenstein,
- Newman, Reis 5 Axelrad 1025 Connecticut
- Avenue, H.W.
Mashington, 0.
C.
20036 Horman A. Coll, Esquire McCarthy, Steel, 8ector 8 Davis 14th Floor, First Hational Bank Building Miami, Florida 33131 Mr. Jack Shreve Office of the Public Counsel
'Room 4,,Holland Bldg.
Tallahassee, Florida 32304 Indian River Junior College Library 3209 Virginia Avenue Fort Pierce, Florida 33450
0 ENCLOSURE PROPOSED QUESTIONS'FOR LOSS OF OFF S!TE SURVEY For losses of offsite power where less than all offsite power was lost:
1.
How many circuits to the offsite net ork are nor-ally available and how many were lost during the event?
2.
What was the cause of the event?
3.:
Why did the other lines not fail when some die =ail?
4.
Was any."voltage increase or decrease experie.-ed just prior to or during the outage?
. I so, please give details, volvages
- leached, a fects, ec.
5.
Was any freauency decay experienced just prior to or during the outag'e?
If so, please give details, lowest frequency
- reached, decay rate, a,fec,s on equipmen. operation, etc.
6.
How long was power unavailable from the circuit?
7.
Date o
Even..
H.
For losses of all offsite power:
1.
How long was the power o f?
How long for partial recovery?
Please give details.
- 2. If turbine trip occurred, how soon after di.d loss of offsite power occur?
- 3. If power was.recovered promptly (10 minutes or less},
was it due to automatic or manual actions?
4.
Was any vol;age increase or decrease experienced just prior to or during
- the. outage?
If so, please give details, voltages
- reached, affects, 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 o
Even.,
Mele there anv other loss of offsite power events ether than we have listed?
I so, pi=asc cive d=~ai ls of each event,
0 II" g