ML18139A272
| ML18139A272 | |
| Person / Time | |
|---|---|
| Site: | Surry, North Anna  |
| Issue date: | 05/09/1980 |
| From: | Varga S Office of Nuclear Reactor Regulation |
| To: | Ferguson J VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.) |
| References | |
| NUDOCS 8005290537 | |
| Download: ML18139A272 (4) | |
Text
~ -
IOCKET FlltSB: fJ~
<(
May 9, Y980
\\
Docket No~
50-281 and 50-338 Mr. J. H. Ferguson Executive Vice President - Power Virai n ia Electric and Power Company Post Office Box 26666 Richmond, Virginia 23261
Dear Mr. Ferguson:
RE:
SURRY POWER STATION, UNIT NOS. 1 AND 2 AND NORTH ANNA, UNIT NO. 1 DISTRIBUTION
~,_
Docket Files 50-280/281/338 NRC PDRs (3)
Loe a 1 PD Rs ( 3)
TERA NSIC NRR Reading ORB1 Reading D: Eisenhut T. Novak S. Varga D. Neighbors C. Parrish I&.E ( 3)
Attorney, OELD G. Lainas L. Engle l*Je are currently reviewing the adequacy of the offsite power systems of nuclear power plants and in particular, the loss of offsite p9wer eteents 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 uoon the information providdd to us via Licensee Event Reports and followup letters which have* been sent to us.
Our records do not indicate that you have experienced any loss of offsi.te power events efther completely or partially. Please review your experiences and, if any are identified, then report them in answer to this letter and furnish the related information as included
\\
in the snclosure.
\\
Please provide your response to us within.30 days of the receipt of this letter.
Sincerely, Steven A. Varga, Chief Ooeratina Reactors Branch #1 D~vision~of Licensing*
Enclosure:
800529053,g Request for Additional
~
~,,
\\ *,,
.\\
\\
\\ **..
\\
,\\
~
FORM 318 (9-76) NRCM 0249 u.*. GOVERNMENT ~RINTING OFP'ICI!!: 1971.. 2&5..,es
e UNITED STATES NUCLEAR REGULATORY COMMIS$10N WASHINGTON, D. C. 20555 Docket Nos. 50-280 50-281 and 50-338 Mr. J. H. Ferguson Executive Vice P-resident - Power Virginia Electric and Power tompany Post Office Box 26666 Richmond, Virginia 23261
Dear Mr. Ferguson:
May 9, 1980 RE:
SURRY POWER STATION, UNIT NOS. l AND 2 AND NORTH ANNA, UNIT NO. 1 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 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 information provided to us via Licensee Event Reports 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 information as included in the enclosure.
Please provide your response to us within 30 days of the receipt of this letter.
Enclosure:
Request for Additional Information cc: w/enclosure See next page s*ncerely, ve~~..£Jh~
Operating Reactors~~h #1 Divisirin of Litensing
Mr. J. H., Ferguson Virginia Electric and Power Company cc:
Mr. Michael W. Maupin Hunton and Williams Post Office Box 1535 Richmond, Virginia 23213 Mr. w. L. Stewart, Manager P. o. Box 315 Surry, Virginia 23883 Swem Li bra ry College of William and Mary Wil1iamsburg, Virginia 23185 Donald J. Burke, Resident Inspector Surry Power Station
- u. s. Nuclear Regulatory Corrrnission Post Office Box 959 Williamsburg, Virginia 23185 May 9, 1980
,.'.\\
.j, LOSS OF OFFSITE POWER SURVEY*
A.. For losses of offsite power where less than all offsite power was lost:*
- l.
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 1 ines not fail when some did fail?
_4.
Was any voltage increase cir 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?**.I{ so, please give details, lowest fr~quency reached, decay rate, affects on equipment operation, etc.:
- r-
- 6.
How long was po~er unavailable from the circuit?*
- 7.
Date of event *
. B.
For losses of all offsite power:
- 1.
How long was the power off? How long for partial recovery?*
Please giV~ details.
- 2. -If turbine trip occurred, how soon after did loss of offsite power occur?
- 3.
If power was recovered promptly (10mini.Jtes or less), was it due to automatic or manual actions?
- 4.
Was any voltage increase or decrease experienced just prior to or during the outage? If so, please give detials, 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..