ML19321A697
| ML19321A697 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 06/27/1980 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Linder F DAIRYLAND POWER COOPERATIVE |
| References | |
| NUDOCS 8007240079 | |
| Download: ML19321A697 (4) | |
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o UNITED STATES g
g NUCLEAR REGULATORY COMMISSION D
WASHINGTON, D. C. 20555 C
%.,,,. #g June 27, 1980 Docket No. 50-409 Mr. Frank Linder General Manager Dairyland Power Cooperative 2615 East Avenue South Lacrosse, Wisconsin 54601
Dear Mr. Linder:
We are continuing our review of the adequacy of station electric distribution system voltages for the Lacrosse Boiling Water Reactor and have found that the infonnation described in the enclosure to this letter is required.
Your response is requested within 45 days of your receipt of this letter.
i Sinc rely, Dennis M. Crutchfield, Ch f Operating Reactors Branch #5 Diviston of Licensing
Enclosure:
Request for Additional 1
Infonnation cc w/ enclosure:
See page 2 800g~o 4 cce>9
Mr. Frank Linder June 27, 1980 cc w/ enclosure:
Fritz Schubert, Esquire Director, Technical Assessment Staff Attorney Division Dairyland Power Cooperative Office of Radiation Programs 2615 East Avenue South (AW-459)
La Crosse, Wisconsin 54601 U. S. Environmental Protection l
Agency
- 0. S. Heistand, Jr., Esquire Crystal Mall #2 Morgan, Lewis & Bock fus Arlington, Virginia 20460 1800 M Street, N. W.
Washington, D. C.
20036 U. S. Environmental Protection Agency Mr. R. E. Shimshak Federal Activities Branch La Crosse Boiling Water Reactor Region V Office Dairyland Power Cooperative ATTN: EIS COORDINATOR P. O. Box 135 230 South Dearborn Street Genoa, Wisconsin 54632 Chicago, Illinois 60604 Coulee Region Energy Coalition Charles Bechhoefer, Esq., Chairman ATTN: George R. Nygaard Atomic Safety and Licensing Board P. O. Box 1583 U. S. Nuclear Regulatory Comission La Crosse, Wisconsin 54601 Washington, D. C.
20555 La Crosse Public Library Dr. George C. Anderson 800 Main Street Departrent of Oceanography La Crosse, Wisconsin 54601 University of Washington Seattle, Washington 98195 Mrs. Ellen Sabelko Society Against Nuclear Energy Mr. Ralph S. Decker 929 Cameron Trail Route 4, Box 190D Eau Claire, Wisconsin 54701 Cambridge, Maryland 21613 Town Chainnan Dr. Lawrence R. Quarles Town of Genoa Kendal at Longwood, Apt. 51 Route 1 Kenneth Square, Pennsylvania 19348 Genoa, Wisconsin 54632 Chairman, Public Service Comission Thomas S. Moore Esq.
of Wisconsin Atomic Safety and Licensing Appeal Board Hill Farms State Office Building U. S. Nuclear Regulatory Comission Madison, Wisconsin 53702 Washington, D. C.
20555 Alan S. Rosenthal, Esq., Chairman Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Comission Washington, D. C.
20555
La Crosse Docket No. 50-409 Request for Additional Infonnation on Adequacy of Station Electric Distribution System Vcitages
References:
o a.
NRC generic letter to all Power Reactor Licensees, " Adequacy of Station Electric Distribution Systems Voltages," dated August 8,1979.
b.
DPC letter, Frank Linder to U.S. NRC, William Gamill, " Adequacy of Station Electric Distribution System Voltage for the La Crosse Boiling Water Reactor," LAC-6822, March 13,1980.
c.
DPC letter, Frank Linder to U.S. NRC, William Gamill, " Adequacy of Station Electric Distribution System Voltage for the La Crosse Boiling Water Reactor,"
LAC-6912, May 12, 1980, d.
Report, Sargent & Lundy, "LACBWR Generating Unit Adequacy of Station Electrical Distribution Systems Voltages," enclosure to c.
Questions:
a 1.
Page 2, paragraph 3 requires that "the adequacy of the onsite distribution of power from the offsite circuit shall be verified by test to assure that analysis results are valid." Reference d did not verify the adequacy of the analysis for the class lE buses in attachment 8.
This should be done as this review is to determine the adequacy of the voltage of the equipment on these buses.
,i 2.
Supply the calculated voltages for all low-voltage AC (less than 480 V) class lE buses (including the alternate source for the static inverter) for each analyzed case.
Do these systems supply any instruments or control circuits as required by GDC 13? If so, is all the equipment capable of sustaining the analyzed voltages without blowing fuses, overheating,etc.,
and without affecting the equipment's ability to perform the required function?
e 3.
There are no identified technical' specifications restricting the use of the following bus interties: 480 V bus lA to bus 1B; 480 V ESS bus lA to bus 18.
a Per NRC guideline l, the use of these bus interties must be analyzed for the worst possible loading condition.
d 4
Sargent & Lundy recommended that the tap for the Reserve Auxiliary transformer be changed from the 72450 V setting to the 70725 V tap, and provided analysis that shows (with above exceptions) that use of this lower tap is satifactory (while original tap is not). DPC, in references b or c, did not commit to making this tap change. OPC should either make this tap change or justify why it isn't changed.
O v