ML19323D906
| ML19323D906 | |
| Person / Time | |
|---|---|
| Site: | Maine Yankee |
| Issue date: | 05/08/1980 |
| From: | Reid R Office of Nuclear Reactor Regulation |
| To: | Groce R Maine Yankee |
| References | |
| NUDOCS 8005220498 | |
| Download: ML19323D906 (3) | |
Text
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NUCLEAR REGULATORY COMMISSION 3
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May 8,1980 Docket No. 50-309 1
Mr. Robert H. Groce Senior Engineer - Licensing Maine Yankee Atomic Power Coupany j
25 Research Drive Westboro, Massachusetts 01581
Dear Mr. Groce:
RE: LOSS OF 0FFSITE POWER EVENTS We are currently reviewing the adequacy of the offsite power systens of nuc' ear 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 i
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 corrpletely or partially. P! ease 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 for the Maine Yankee Atomic Power Station within 30 days of the receipt of this letter.
l Sincerely, obert W. Reid, Chief Operating Reactors Branch #4 Division of Licensing
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page e
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Yankee Atomic Electric Ccmpany cc w/ enclosure (s):
firs. L. Patricia Doyle, President E. W. Thurlow, President SAFE POWER FOR MAINE N
Maine Yankee Atomic Power Company Post Office Box 774 Edison Drive Camden, liaine 04843 Augusta, Maine 04336 First Selectman of Wiscasset Mr. Donald E. Vandenburgh Municipal Building Vice President - Engineering U. S. Route 1 Yankee Atomic Electric Company Wiscasset, Maine 04578 20 Turnpike Road Westboro, Massachusetts 01581 Director Technical Assessment Division John A. Ritsher, Esquire Office of Radiation Programs Ropes & Gray (AW-459) 225 Franklin Street U. S. Environmental Protection Agency Boston, Massachusetts 02110 Crystal Mall #2 Arlington, Virginia 20460 Mr. John fl. R. Paterson Assistant Attorney General U. S. Environmental Protection Agency State of Maine Region I Office Augusta, Maine 04330 ATTH: EIS COORDINATOR JFK 9ederal Building Mr. Nicholas Barth Boston, liassachusetts 02203 Executive Director Sheepscot Valley Conservation Stanley R. Tupper, Esq.
Association, Inc.
Tupper and Bradley P. O. Box 125 102 Townsend Avenue Alan, Maine 04535 Boothbay Harbor, Maine 04538 Wiscassett Public Library Association David Santee Miller, Esq.
High Street 213 Morgari Street, N. W.
Wiscasset, "laine 04578 Washington, D. C.
20001 i
Mr. Robert R. Radcliffe Of fice of Energy Resources 55 Capitol Street Augusta, Maine 04330 Robert M. Lazo, Esq., Chainnan Atomic Safety and Licensing Board U. S. Nuclear Regulatory Comission Washington, D. C.
20555 Dr. Cadet H. Hand, Jr., Director Bodega Marine Laboratory University of California Bodega Bay, California 94923 Nr. Gustave A. Linenberaer State Planning Officer Atomic Safety and Licensing Board Executive Department U. S. Nuclear Regulatory Commission State of Maine Washington, D.'C.
20555 189 State Street Augusta, Maine,04330
'4 LOSS OF OFFSITE POWER SURVEY *--
Enclosure 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?
. hat was the cause of the event?
2.
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3.
Why did th~e other line's not fail when some did fail?
4.
Was any voltage in' crease dr decrease experienced just prior' to or during the outage? If so, please give details, voltages reached, affects, etc.
Was any frequency decay experienced jus't prior to or ifuring the~
5.
outage? If so, please give details, lowest frequency reached, J
decay rate, affects on equipment operation, etc..',
1 6.
How long was poQer 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 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 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.
J decay rate, affects on equipment operation, etc.
6.
Date of event.
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