ML19211A829
| ML19211A829 | |
| Person / Time | |
|---|---|
| Site: | Yankee Rowe |
| Issue date: | 12/04/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Groce R YANKEE ATOMIC ELECTRIC CO. |
| References | |
| NUDOCS 7912210158 | |
| Download: ML19211A829 (3) | |
Text
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UNITED STATES
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8 NUCLEAR REGULATORY COMMISSION
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December 4,1979 Doi:ket No. 50-29 Mr. Robert H. Groce Licensing Engineer Yankee Atomic Electric Company 20 Turnpike Road Westboro, Massachusetts 01581
Dear Mr. Groce:
RE: YANKEE R0WE ATOMIC POWER STATION 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 infomation 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, report them in answer to this letter and furnish tha related informat %n as included in the enclosure.
Please provide your response for the Yankee Rowe Atomic Power Station to us within 90 days of the receipt of this letter.
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Sincerely, Lovww.
Dennis L. Zieman' Chief Operating Reactors Branch #2 Division of Operating Reactors
Enclosure:
Request for Additional Information cc w/ enclosure:
See next page 1636 049 I
7 012210 f
Mr. Robert H. Groce December 4, 1979 w/ enclosure:
cc Mr. Lawrence E. Minnick, President Yankee Atomic Electric Company 20 Turnpike Road Westboro, Massachusetts 01581 Greenfield Community College 1 College Drive Greenfield, Massachusetts 01301 Chairman Board of Selectmen Town of Rowe Rowe, Massachusetts 01367 Energy Facilities Siting Council 14th Floor One Ashburton Place Boston, Massachusetts 02108 Director, Technical Assessment Division Office of Radiation Programs
( AW-4 59)
U. S. Environmental Protection Agency Crystal Mall #2 Arlington, Virginia 20460 U. S. Environmental Protection Agency Region I Office ATTN:
EIS COORDINATOR JFK Federal Building Boston, Massachusetts 02203 i636 050
....L.,
Enclosure I
LOSS OF OFFSITE POWER SURVEY
- A.
For losses of offsite power where less than all offsite powsr 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 t he outage? If so, please give details, lowest frequency reacheo, 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:
1.
How long was the power off? How long for partial recovery?
Please give details.
2.
If turbine trip occurred, how soon after did lass 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, cffects, etc.
5.
Was any frequency decay experienced just prior to or durir.g the outage? If so, please give details, lowest frequency reached, decay rate, affects on equipment operation, etc.
6.
Date of event.
1636 051
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