ML19254D072
| ML19254D072 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 09/18/1979 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Jackie Jones CAROLINA POWER & LIGHT CO. |
| References | |
| NUDOCS 7910220320 | |
| Download: ML19254D072 (3) | |
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SEPTEMBER 1 8 1973 Docket No. 50-324 Mr. J. A. Jones Executive Vice President Carolina Power & Light Compar.y 336 Fayetteville Street Raleigh, North Carolina 27602
Dear Mr. Jones:
We 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 ccr.cerns the history of experienced total and partial power outages and attendent voltage or frequency conditions of the grid.
In cur review of this matter we have drawn upon the information provided to us via Licensee Event Reports and followup letters which you have sent to us. Our review of there reports indicated the loss of offsite
-power events have occurred at the Brunswick Steam Electric Plant, Unit No. 2 on March'26, 1975.
To complete our review of loss of offsite power events we require the additional infonnation concerning the Brunswick Steam Electric Plant, Unit No. 2 offsite grid indicated in the enclosure to this letter.
Please provide your response to the attached questions for the Brunswick Steam Electric Plant Unit No. 2 within 90 days of receipt of this letter.
Sincerely, h Y,peo Thomas W. Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reactors
Enclosure:
Re uest for Additional nf$rmation cc w/ enclosure:
See next page ik0If 0)
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79Mseo320
Mr. J. A. Jones sgPTEMSER18I373 2
Carolina. Power & Light Company cc:
Richard E. Jones Esquire Carolina Pager & Light Company 336 Fayetteville Street Raleigh, North Carolina 27602 George F. Trowbridge, Esquire Shaw, Pittman, Potts & Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 John J. Burney, Jr., Esquire Burney, Burney, Sperry & Barefoot 110 North Fifth Avenue Wilmington, North Carolina 28401 Southport - Brunswick County Library 109 W. Moore Street Southport, North Carolina 28461 9
O
s REQUEST FOR ADDITIONAL INFORMATION A.
For losses of offsite power where less than all offsite power was lost:
1.
How many circuits to the offsite network are normally 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 did fail?
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 so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
6.
How long was power unavailable from the circuit?
7.
Date of Event.
B.
For losses of all offsite power:
How long was the power off? -How long for partial recovery? Please give 1.
details.
2.
If turbine trip oc:urred, how soon after did loss of offsite power occur?
3.
If power was recovered promptly (10 minutes or less), was it due to autcmatic 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 so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
6.,
Date of Event.
C.
Were there any other loss of offsite power events other than we have listed?
If so, please give details of each event.
.