ML19254D076
| ML19254D076 | |
| Person / Time | |
|---|---|
| Site: | Farley  |
| Issue date: | 10/02/1979 |
| From: | Schwencer A Office of Nuclear Reactor Regulation |
| To: | Barton A ALABAMA POWER CO. |
| References | |
| NUDOCS 7910220329 | |
| Download: ML19254D076 (3) | |
Text
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'l $b. e ( [ h NUCLEAR REGULATORY COMMISSION j 'C /. E WASHINGTON, D. C. 20555 5
OCT 2 1979 Docket No. 50-348 Mr. Alan R. Barton Senior Vice President Alabana Pcwer Company Post Office Box 2641 Birningham, Alabama 35291
Dear fir. Barton:
RE: JOSEPH M. FARLEY NUCLEAR PLANT, UNIT NO. 1 We are currently reviewing the adequacy of the offsite ;ower 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-infomation 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 September 16, 1977 and August 12, 1978.
In order to complete our review of loss of offsite power events we require response to the enclosed recuest for information.
We request that you provide your response within 90 days of the receipt of this letter.
Sincerely, 2 tWAU A. Schwencer, Chief
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Operating Reactors Branch #1 Division of Operating Reactors Enciosure:
Request for Infomation cc: w/ enclosure See next page 1194 110 79$22o 3W
Mr. Alan R. Barton Alabama Pcwer Company cc: Ruble A. Thomas, Vice President Sout53rn Services, Inc.
Post Office Box 2625 Birmingham, Alabama 35202 George F. Trowbridge. Esquire Shaw, Pittman, Potts and Trewbridge 1800 M Street, N.W.
Washington, D. C.
20036 Uchn Bingham, Esquire Balch, Bingham, Baker, Hawthorne, Williams and Ward 600 North 18th Street Birmingham, Alabama 35202 Edward H. Keiler, Esquire Keiler and Buckley 9047 Jeffersen Highway River Ridge, Louisiana 70123 George S. Houston Memorial Library 212 W. Burdeshaw Street -
Dothan, Alabama 36303
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s ATIACHMENT A.
For losses of offsite power where less than all offsite power was lost:
Mcw many circuits to the offsite network are normally available and how
'l-many +.ere lost during the event?
2.
What was the cause of the event?
3.
Why did the other lines not fail when some did fail?
Was any voltage increase or decrease experier.ced just prior to or during 4
the cutage? 'If so, please give details, voltages reached, affects, etc.
Was any frequency d:. cay experienced just prior to or during the outage?
5.
If so, please give details, lowest frequency reached, decay rate, affects or, equipment operation, etc.
6.
How icng.was power unavailable frem the circuit?
7 Date of Event.
3.
For lesses s.
all offsite power:
1.
How long was the power off? How long for partial recovery? Please give details.
2.
If turbine trip occurred, how scon after did loss of offsite power occur?
If power was recovered promptly (10 minutes or less), was it due to automatic 3.
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, affects, etc.
5.
Was any frequency decay experienced just prior 'to or during the outage?
If sL, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
6.
Date of Event.
C.
Were there any cther loss of offsite power events other than we have listed?
If so, please give details of each event.
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