ML19260C671
| ML19260C671 | |
| Person / Time | |
|---|---|
| Site: | Brunswick  |
| Issue date: | 12/13/1979 |
| From: | Ippolito T Office of Nuclear Reactor Regulation |
| To: | Jackie Jones CAROLINA POWER & LIGHT CO. |
| References | |
| NUDOCS 8001080281 | |
| Download: ML19260C671 (3) | |
Text
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UNITED STATES f
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NUCLEAR REGULATORY COMMISSION g 3--
l WASHINGTON, D. C. 20555
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v DECEY3ER. 3 373 Decket No. 50-325 Mr. J. A. Jones Executive Vice President Carolina Power and Light Company 336 Fayetteville Street Raleigh, North Carolina 27602
Dear Mr. Jones:
We are currently reviewing the adequacy of the offsite pcwer systems of nuclear power plants and in particular, the loss of offsite power events at Brunswick Unit No.1.
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 uoan the infomation provided to us via Licensee Event Mports and followup letters which have been sent to us.
Our records do not indicate that you have experienced any loss of offsite power events either completely or partially. Please review your experiences and, if any are identified, then report them in answer to this letter and furnish the related infomation as included in the enclosure.
Please provide your response for the Brunswick Steam Electric Plant Unit No.1 to us within 90 days of the receipt of this letter.
Si ncerely, MWdk Thomasd# Ippolito, Chief Operating Reactors Branch #3 Division of Operating Reactors Encl osure:
Request for Additional Information 1702 277
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Mr. J. A. Jores Carolina Power & Ligrt Company
-2 cc:
Richard E. Jones, Esquire Carolina Power & 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 1702 278
r 9
RE0 VEST FOR ADDITIONT I?:F P S TION A.
For losses of offsite power where less t.an all c#fsite p:wer was lost:
. 1.
How many circuits to the offsite net ork a e o :. 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 whe. some did fail?
4.
Was any voltage increase or decrease experier:ed just prior to or during the outage?
If so, please give detafis, voinges rea: hec, affects, etc.
5.
Was any frequency decay experienced.'ust ;-it-to or during the outage?
If so, please give details, lowest frecuen:y eached, decay rate, affects on equipment operation, etc.
6.
How long was power unavailable from the cf rc.it?
7.
Date of Event.
B.
For losses of all offsite power:
1.
How long was the power off? How long fer pa-tial recovery? Please give details.
2.
If turbine trip occurred, how soon after did icss of offsite power occur?
3.
If power was recovered promptly (10 minutes :r less), was it due to automatic or manual actions?
4.
Was any voltage increase or decrease ex:.e-ie :ed jus prior to or during the outage?
If so, please give cetails, vol ages reached, affects, etc.
5.
Was any frequency decay experienced just =ri:r to or during the cutage?
If so, please give details, lowest frequer.cy reached, decay rate, affects on equipment operation, etc.
6.' Date of Event.
C.
Were there any other loss of offsite co-er s'.enn ctr.er :har we have listed?
If so, please give details of each ever..
1702 279