ML19242B541
| ML19242B541 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 07/09/1979 |
| From: | Ziemann D Office of Nuclear Reactor Regulation |
| To: | Bixel D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-08-01.A, TASK-RR NUDOCS 7908080688 | |
| Download: ML19242B541 (3) | |
Text
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UNITED STATES f, -
NUCLEAR REGULATORY COMMISSION G
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WASHINGTON, D. C. 20555 E
o July 9,1979 Docket No. 50-155 Mr. David Bixel Nuclear Licensing A:'ministrator Consumers Power Company 212 West Michigan Avenue Jachon, Micnigan 49201
Dear Mr. Bixel:
We are continuing our review of your June 14, 1978 submittal related to the generic issue of onsite power systems.
Based on our review we have found that the additional information identified in the enclosure is needed to continue our review. To maintain our review schedule we request your reply within 45 days of the date of this letter.
Sincerely,
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. mut-Dennis L. Ziemann, Chief Operating Reactors Branch #2 Division of Operating Reactors
Enclosure:
Request for Additional In formation cc w/ enclosure:
See next page 531 bi o
q$6868E 7908080 ($ 88 /S
Mr. David Bixel
- 2 July 9,1"79 cc w/ enclosure:
Mr. Paul A. Perry, Secretary Consumers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Judd L. Bacon, Esquire Consa,aers Power Company 212 West Michigan Avenue Jackson, Michigan 49201 Hunton & Williams George C. Freeman, Jr., Esquire P. O. Box 1535 Richmond, Virginia 23212 Peter W. Steketee, Esquire 505 Peoples Building Grand Rapids, Michigan 49503 Charlevaix Public Library 107 Clinton Street Charlevoix, Michigan 49720 i
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REQUEST FOR ADDITIONAL INFORMATION BIG ROuK POINT DEGRADED GRID V0LTAGE
- 1. Provide data showing the maximum and minimum voltages reflected at the 480V safety-related bus when the auxiliary systens are being supplied by the:
a.
Station generator b.
138 kV offsite system c.
Backup 46 kV system
- 2. Provide a voltage analysis to justify your choice of placing the proposed second level undervoltage protection on the 2400 volt bus as opposed to the 480 volt safety-related bus.
- 3. Provide thc voltage setpoint of the existing undervoltage relays on the 480 volt safety bus and their time delay.
- 4. Provide the total elapsed time from operation of second level under-voltage protection system to the initiation of the existing under-voltage relays to start the diesel-generator.
- 5. Provide the results of your voltage analysis for the full load and no-load conditions for each bus of the onsite distribution system.
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