ML20010E129
| ML20010E129 | |
| Person / Time | |
|---|---|
| Site: | La Crosse File:Dairyland Power Cooperative icon.png |
| Issue date: | 08/28/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Linder F DAIRYLAND POWER COOPERATIVE |
| References | |
| TASK-08-03.B, TASK-8-3.B, TASK-RR LSO5-81-08-076, LSO5-81-8-76, NUDOCS 8109030125 | |
| Download: ML20010E129 (3) | |
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August 28, 1981
- m J i C'/ /(lL Docket No. 50-409 i
LS05-81 08-076 NL j9 0
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fir. Frank Linder Yy
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3 Lacrosse, Wisconsin 54601 7] e Dear Mr. Linder;
SUBJECT:
SEP TOPIC VIII-3.0, DC POWER SYSTE't BUS VOLTAGE MONITORIf;G A!!D ANNUNCIATION, SAFETY EVALUATION FOR LACROSSE The enclosed staff safety evaluation is based on a contractor's docurent that has been made available to you previously. This document supports the findings of the staff safety evaluation of Topic VIII-3.B and reconnends modifications to the de systems.
The need to actually implenent these changes will be determined during the integrated safety assessment. This safety evaluation may be revised in the future if your facility design is changed or if NRC criteria relating to this topic are modified before the integrated assessment is completed.
Sincerely, Dennis M. Crutchfield, Chief Operating Reactors Branch No. 5 1
Division of Licensing
Enclosure:
At stated j, p hghna.
cc w/ enclosure:
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i Mr. Frank Linder i
CC Fritz Schubert, Esquire U. S. Environmental Protection Staff Attorney Agency Dairyland Power Cooperative Federal Activities Branch 2615 East Avenue South Region V Office la Crosse, Wisconsin 54601 ATTN: EIS COORDINATOR 230 South Dearborn Street
- 0. S. Heistand, Jr., Esquire Chicago, Illinois 60604 Morgan, Lewis & Bockius 1800 M Street, N. W.
Mr. John H. Buck Washington, D. C.
20036 Atom'ic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Comnission Mr. R. E. Shimshat Washington, D. C.
20555 La Crosse Boiling Water Reactor Daf aland Power Cooperative Dr. Lawrence R. Quarles t
P. 0. Box 135 Kendal at Longwood, Apt. 51 Genoa, Wisconsin 54632 Kenneth Square, Pennsylvania 19348 Ms. Anne K. Morse Charles Bechhoefer, Esq., Chairman Coulee Region Energy Coalition Atomic Safety and Licensing Board P. O. Box 1583 U. 5. Nuclear Regulatory Commission La Crosse, Wisconsin 54601 Washington, D. C.
20555 La Crosse Public Library Dr. George C. Anderson 800 ifain Street Department of Oceanography La Crosse, Wisconsin 54601 University of Washington Seattle, Washington 98195 U. S. Nuclear Regulatory Commission Resident Inspectors Office Mr. Ralph S. Decker Rural Route #1, Box 276 Route 4, Box 1900 Genoa, Wisconsin 54632 Cambridge, Maryland 21613 Town Chairman Thomas S. Moore Town of Genoa Atomic Safety and Licensing Appeal Board Route 1 U. S. Nuclear Regulatory Commission Genoa, Wisconsin 54632 Washington, D. C.
20555 Chairman, Public Service Commission of Wisconsin Hill Farns State Office Building Madison, Wisconsin 53702 Alan S. Rosenthal, Esq., Chairman Atomic Safety and Licensing Appeal Board U. S. Nuclear Regulatory Commission Washington, D. C.
20555 Mr. Frederick Milton Olsen, III 609 North lith Street Lacrosse, Wisconsin 54601
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i SYSTEMATIC EVALUATION PROGRAM TOPIC VIII-3.B LACROSSE TOPIC:
VIII-3.B, DC POWER SYSTEM BUS VOLTAGE MONITORING AND ANNUNCIATION I.
INTRODUCTION To ass;re the design adequacy of the dc power system battery and bus voltage monitoring and annunciation schemes such that the operator can (1) prevent the loss of an emergency dc bus; or (2) take timely corrective action in the event of loss of an emergency dc bus, we reviewed the dc power system battery, battery charger, and bus voltage monitoring and annuncation design with respect to dc power system operability status indication to the operator.
II.
REVIEW CRITERIA The review critcria are presented in Section 2 of EG&G Report 1353F, "DC Power System Bus Voltage Monitoring and Annunciation."
III.
RELATED SAFETY TOPICS AND INTERFACES None IV.
REVIEW GUIDELINES None V.
EVALUATION As noted in EG&G Report 1353F the Lacrosse control room has no indication of battery current, battery charger current, or breaker / fuse status and only one dc bus voltage is indicated.
Therefore, the Lacrosse dc power system oonitoring is not in compliance with current licensing criteria.
VI.
CONCLUSION The staff proposes that as a minimum, the following additional indications and alarms of the Class lE dc power system (s) status shall be provided in the control room.
Battery current (ammeter-charge / discharge)
Battery charger output current (ammeter)
DC bus ground alarm (for ungrounded system)
DC bus voltage Battery breaker (s) or fuse (s) open alarm Battery charger output breaker (s) or fuse (s) open alarm
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