ML19324B716
| ML19324B716 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 10/30/1989 |
| From: | Brey H PUBLIC SERVICE CO. OF COLORADO |
| To: | Weiss S NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation |
| References | |
| P-89426, NUDOCS 8911080070 | |
| Download: ML19324B716 (2) | |
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2420 W. 26th' Avenue, Suite 1000, Denver, Colorado 80211 1
l October 30, 1989 Fort St. Vrain Unit No. 1 P-89426 U, S. Nuclear Regulatory Commission ATTN:
Document Control. Desk Washington, D.C.
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ATTN:
Seymour H. Weiss, Director j
Non-Power Reactor, Decommissioning and Environmental Project Directorate L
Docket No. 50-267
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SUBJECT:
Station Batteries, Use Of A Five-Day Equalizing Charge
REFERENCES:
- 1) NRC letter, Heitner to Williams, dated 9/15/88 (G-88385)
- 2) PSC letter, Williams to Calvo, dated 4/19/88 (P-88116) l
Dear Mr. Weiss:
This letter identifies Public Service Company of Colorado's (PSC) experience using a five-day equalizing charge on lead-antimony l
g station batteries during the past year.
The NRC requested this information in Reference 1.
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In 1988, PSC submitted a Technical Specification amendment request (Reference 2) to allow e five-day equalizing charge on the newly H
installed lead-antimony station batteries.
The station batteries p
were changed from lead-calcium to lead-antimony in 1988 as part of an i
overall program to upgrade the plant's DC power system.
The L '*
manufacturer of the newly installed batteries specified that up to five days may be required to perform an equalizing charge. At FSV, when an equalizing charge is performed on a station battery, the battery is disconnected from its associated DC bus to avoid damaging equipment powered by the bus.
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.0ctober 30,11989 i
p; LThei first' year of service for the 1'ead-antimony batteries ~ ended.in y
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' September 1989.
Each. station battery was disconnected. from its: DC c
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~ bus and-charged one time 1during the year.
In each instance, the equalizing charge was required to restore the. battery to an operable g
status'following discharge testing.and'was performed during a reactorf i
shutdown.
The equaliring. charge process lasted approximately, four.
4 og.'
. days.per battery and battery. response was excellent,
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-If you have any questions, please ' contact 'Mr.
M. H.: Holmes at' t
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.(303) 480-6940.-
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Very truly:yours, Y
v, H.-L. Brey, Manager Nuclear Licensing and Resource. Management; r
HLB /JFH/imb-
.Regiona'l Administrator, Region IV!
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ATTN:
Mr. T. F. Westerman, Chief Projects Section B i
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Mr. Robert Farrell Senior Resident Inspector 3 Fort St. Vrain f
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