ML20010C900
| ML20010C900 | |
| Person / Time | |
|---|---|
| Site: | Big Rock Point File:Consumers Energy icon.png |
| Issue date: | 08/18/1981 |
| From: | Crutchfield D Office of Nuclear Reactor Regulation |
| To: | Hoffman D CONSUMERS ENERGY CO. (FORMERLY CONSUMERS POWER CO.) |
| References | |
| TASK-08-03.B, TASK-8-3.B, TASK-RR LSO5-81-08-034, LSO5-81-8-34, NUDOCS 8108210188 | |
| Download: ML20010C900 (3) | |
Text
L i 3 l*
%g eg I
l i
August 18, 1981 i
$,i h 6[bb Docket No. 50-155 LS05 08-034 8~
AUG 2 01981 -
u.3, m m u m w o..
anones b\\n/hs Mr. David P. Hoffman
' W T i.
fluclear Licensing Administrator Consumers Power Company 1945 W. Parnall Road Jackson, Michigan 49201
Dear Mr. Iloffman:
SUBJECT:
SEP TOPIC VIII-3.B. DC POWER SYSTEll BUS VOLTAGE !!0tlITORIliG APID ANiluNCIATI0ft, SAFETY EVALUATIO'l FOR BIG ROCK POIllT The enclosedastaff safety evaluation is based on a contractor's document that has been made aVallable to you previously. This document supports the findings of the staff safety evaluation of Topic VIII-3.B and recon.-
mends modifications ta the de systems.
The need to actually implement these changes util be determined during i
the integrated safety assessnent. This safety evaluation may be revised in the fut::re if your facility design is changed or if NRC criteria re-lating to this topic are modified before the integrated assessment is completed.
l Sincerely, Dennis H. Crutchfield, Chief Operating Reactors Branci; No. 5 Division of Licensing 560Y
Enclosure:
As stated
- di cc w/ enclosure:
p us (._18)
See next page A bb,.
i
- c. skhy i
8108210188 810818 PDR ADOCK 05000155 P
PD"
/
0 0
m,.a.
..s3
...s.R
..S.EP.nyf..,
. 0.$M.,
0.5f,gt,.,
.. A h DL,.,,
. Russ,e,,1 L, WPa u,1,s,p.n,,, grb,.t,,d,hfiel,,d, G.,,,,, n a s,,,,,,
d
.f<A!M....nn..
W sum. >
A
...f.M..lal,,,,,,, s/dte,1, ag,,/81
,,att.281, 8Ll,281,,,
m,. >
i t ac ronu sta va m uncu om OFFICIAL RECORD COPY usoro-mi m*o
s y
Mr. David P. Hoffman o
CC Mr. Paul A. Perry, Secretary.
U. S. Environmental Protection Consumers Power Conany Agency 212 kest Michigan Avenue Federal Activities Branch Jackson, Michigan 49201 Region V Office ATTN: EIS C0ORDINATOR Judd L. Bacon, Esquire 230 South Dearborn Street Censumers Pcwer Cogany Chicago, Illinois 60604 212 West Michigan Avenue Jackson, Michigan 49201 Herbert Grossman, Esq., Chairman Atomic Safety and Licensing Board Joseph Gallo, Esquire U. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Washington, D. C.
20555 1120 Connecticut Avenue Room 325 Dr. Osca.r H. Paris Washington, D. C.
20036 Atomic Safety and Lict.nsing Board U. S. Nuclear Regulatory Comission Peter W. Steketee, Esquire Washington, D. C.
20555 505 Peoples Building Grand Rapids, Michigan 49503 Mr. Frederick J. Shon Atomic Safety and Licensing Board Alan S. Rosenthal, Esq., Chairman U. S. Nuclear Regulatory Comission Atomic Safety & Licensing Appeal Board Washington, D. C.
20505 U. S. Nuclear Regulatory Comission Washington, D. C.
20555 Big Rock Point Nuc. lear Power Plant ATTN: Mr. C. J. Hartman Mr. John O'Neill, II Plant Superintendent Route 2, Box 44 Charlevoix, Michigan 49720 Maple City, Michigan 49664 Christa-Mari a Charlevoix Public Library Route 2 Box 108C 107 Clinton Street Charlevoix, Michigan 49720 Charlevoix, Michigan William J. Scanlon, Esquire Chairman 2034 Pauline Boulevard County Board of Supervisors Ann Arbor, Michigan 48103 Charlevoix County Charlevoix, Michigan 49720 Resident Inspector Big Rock Point Plant Office of the Governor (2) c/c U.S. NRC.
Room 1 - Capitol Building RR #3, Box 600 Lansing, Michigan 48913 Charlevoix, Michigan 49720 Herbert Semel Mr. Jim E. Mills' Council for Christa Maria, et al.
Route 2, Box 108C Urban Law Institute Charlevoix, Michigan 49720 Antioch School of Law 263316th Street, NW Thomas S. Moore Washington, D. C.
20460 Atomic Safety i Licensing Appeal Board U. S. Nuclear Regulatory Comission Washington, D. C.
205 e
s w
TOPIC:
VII-3.B. DC POWER SYSTEM BUS.V0LTAGE MONITORING AND ANNUNCIATION 4
I.
Introduction i
To assure the design adequacy of the dc power system battery and bus j
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 volt-age monitoring and annunciation design with respect tn dc power sys-tem operability status indication to the operator.
j II.
Review Criteria 1
The review criteria are presented in Section 2 of EG&G Report 1344F, "DC Power System Bus Voltage Monitoring and Annunciation".
III.
Related Safety Topics and Interfaces a
None IV.
Review Guidelines None i
V.
Evaluation As noted in EG&G Report 1344F, the Big Rock Point control room has no indication of dc bus voltage, battery current, battery charger current, or breaker / fuse status. Therefore, the Big Rock Point de power system monitoring is not in compliance with current licensing criteria.
i
]
VI.
Conclusion
~
The staff proposes that as a minimum, the following additioncl indica-tions and alarms of the Class 1E de 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)
Battery breaker (s) or fuse (s) open alarm Battery charger output breaker (s) or fuse (s) open alarm de bus voltage f
I 1
-