ML19209C476
| ML19209C476 | |
| Person / Time | |
|---|---|
| Site: | Oyster Creek |
| Issue date: | 09/25/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Finfrock I JERSEY CENTRAL POWER & LIGHT CO. |
| References | |
| TASK-08-01.A, TASK-RR NUDOCS 7910150626 | |
| Download: ML19209C476 (3) | |
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September 25, 1979 Docket No. 50-219 Mr. I. R. Finfrock, Jr.
Vice President - Generation Jersey Central Power & Light Company Madison Avenue at Punch Bowl Road Morristown, New Jersey 07960
Dear Mr. Finfrock:
RE: 0YSTER CREEK NUCLEAR GENERATING STATION, 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 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 you have sent to us. Our review of these reports indicated the loss of offsite power events have occurred at Oyster Creek Nuclear Generating Station on September 8,1973, July 28,1977, February 14, 1978, and August 24, 1978.
To complete our review of loss of offsite power events we require the additional ir.fomation concerning the station offsite grid indicated in the enclosure to this letter.
Please provide your response to the attached questions for the Oyster Creek Nuclear Generating Station within 90 days of receipt of this letter.
Sincerely, C/ w.&
Dennis L. Ziemann, Chief Operating Reactors Branch #2 Division of Operating Reactors
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page l})4 /2[
7 91015 0 h P
Mr. I. R. Finfrock, Jr. September 25, 1979 CC G. F. Trowbridge, Esquire Shaw, Pittman, Potts and Trowbridge 1800 M Street, N. W.
Washington, D. C.
20036 GPU Service Corporation ATTN:
Mr. E. G. Wallace Licensing Manager 260 Cherry Hill Rcad Parsippany, New Jersey 07054 Anthony Z. Roisman Natural Resources Defense Council 917 15th Street, N. W.
Washington, D. C.
20005 Steven P. Russo, Esquire 248 Washington Street P. 0. Box 1060 Toms River, New Jersey 08753 Joseph W. Ferraro, Jr., Esquire Deputy Attorney General State of New Jersey Departnent of Law and Public Safety 1100 Raynond Boulevard Newark, New Jersey 07012 Ocean County Library Brick Township Branch 401 Chanbers Bridge Road Brick Town, New Jersey 08723 1134 228
ENCLOSURE REQUEST FOR ADDITIONAL INFORMATION LOSS OF 0FFSITE POWER A.
For losses of offsite power where less than all offsite power was lost:
1.
How many circuit's 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 soms 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?
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7.
Date of Event.
B.
For losses.of all offsite power:
1.
How long was the power off? How long for partial recovery?
Please give details.
2.
If turbine trip occurred, how soon after did 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 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 ecuipment 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.
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