ML20151S193
| ML20151S193 | |
| Person / Time | |
|---|---|
| Site: | Fort Saint Vrain  |
| Issue date: | 04/20/1988 |
| From: | Robert Williams PUBLIC SERVICE CO. OF COLORADO |
| To: | Calvo J NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM), Office of Nuclear Reactor Regulation |
| Shared Package | |
| ML20151S197 | List: |
| References | |
| P-88116, TAC-67933, NUDOCS 8804280233 | |
| Download: ML20151S193 (3) | |
Text
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I O Public Service ~
= =/ h P.O. Box 840 Denver, CO 80201 0840 April 20' 1988 R.O. M AMS,A.
VICE PRESIDENT Fort St. Vrain NUCLEAR OPERATIONS Unit No. 1 P-88116 U. S. Nuclear Regulatory Commission ATTN:
Document Control Desk Washington, D.C.
20555 Attn:
Mr. Jose A. Calvo, Directcr Project Directorate IV Docket No. 50-267
SUBJECT:
Proposed Technical Specification Change -
DC Batteries
Dear Mr. Calvo:
This is an amendment request to the Fort St.
Vrain Technical Specifications for LC0 4.6.1, Auxiliary Electric System.
Attachment 1
is a summary of proposed changes to the existing license.
is tne proposed changes to the existing license. is the Significant Hazards Consideration for the proposed changes to the existing license.
In consideration,of the proposed changes, Public Service Company of Colorado (PSC) is attempting to provide a more reliable source of D.C.
power.
Based on the type of batteries to be installeri at Fort St. Vrain and manufacturer's recommendations, up to 5 consecutive days may be required to perform an equalizing charge or, a battery.
At Fort St. Vrain, it is necessary to disconnect a station battery and associated batte ry charger from its D.C.
bus to perform an equalizing charge to preclude damaging the electrical loads on the D.C.
bus.
In addition, the requirement in the existing license that the O.C. bus tie breaker is closed is proposed to be changed to ensure O.C. bus independence is maintained when a station battery or b>.ttery charger is inoperable.
The change to allow up to 5 consecutive days to perform an equalizing charge with a station battery and associated battery charger disconnected from the D.C. bus is consistent with the allowance in the Fort St. Vrain Technical Specification Upgrade Program (TSUP) draft for the O.C.
Power Sources, Section 3/4.8.2.
PSC is not including a cumulative limit on the total amount of time a battery can be disconnected from its 0.C. bus during any period as included in the TSUP.
PSC desires to obtain operating experience with th replacement batteries before a cumulative limit is consider d.
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8804280233 880420 i
fDR ADOCK 05000267 II
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t P-88116 April 20, 1988
'In accordance with the provisions of'10CFR170,uan application fee for-
$150.00 is enclosed.
If you have any questions or comments concerning the enclosed information, please call M. H. Holmes at (303) 480-6960.
Very truly yours, a'
r.
R. O. Williams, Jr.
Vice President, Nuclear Operations R0W/JAC/1mb Attachments cc:
Regional Administrator, Region IV ATTN: Mr. T. F. Westerman, Chief Projects Section B Mr. Robert Farrell Senior Resident Inspector Fort St. Vrain Mr. Albert Hazel Colorado Department of Health i
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UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION l
i In the Matter
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i Public~ Service Company of Colorado
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Docket No. 50-267 Fort St. Vrain Unit No. 1
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i AFFIDAVIT i
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- Williams, Jr., being first duly sworn, deposes and saysi That he is Vice President, Nuclear Operations, of.Public Service Company o f.
- Colorado, the Licensee herein, that he has read the foregoing Application of Amendment to Appendix A of Facility Operating License and.knows the contents 'thereof, and that the i
statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.
s R. O. Williams, Jr:
Vice President Nuclear Operations STATE OF add
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COUNTY OF_ b A
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Subscribe and sworn to before me, a Notary Public on this j
Ja 6 day of OAAf 198f.
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Notary'Public
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My commission expires __
f//'7 198f.
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