ML20214T280

Forwards Application for Amend to License DPR-34,changing Tech Specs for Standby Diesel Generator Surveillance.Diesel auto-start Capability on Simulated Loss of Bus Voltage Proposed to Be Tested Every 6 Months.Fee Paid

ML20214T280
Person / Time
Site:	Fort Saint Vrain
Issue date:	09/24/1986
From:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
To:	Berkow H Office of Nuclear Reactor Regulation
Shared Package
ML20214T282	List: ML20214T280 ML20214T300 ML20214T308
References
P-86549, TAC-63029, NUDOCS 8609300248
Download: ML20214T280 (3)

Text

s OPublic Service- ..

Company of Colorado 2420 W. 26th Avenue, Suite 1000, Denver, Colorado 80211 September 24, 1986 Fort St. Vrain Unit No. 1 P-86549 Director of Nuclear Reactor Regulation U. S. Nuclear Regulatory Commission Washington, D.C. 20555 Attention: Mr. H. N. Berkow, Director Standardization and Special Projects Directorate Docket No. 50-267

SUBJECT:

Proposed Technical Specification Change - Standby Diesel Generator Surveillance

Dear Mr. Berkow:

This letter is a submittal of proposed changes to the Fort St. Vrain Technical Specifications for SR 5.6.1, Standby Diesel Generator Surveillance. Attachment 1 is a Summary of Proposed Changes to the existing license. Attachment 2 is the Proposed Changes to the existing license. Attachment 3 is the Safety Evaluation for the proposed change. Attachment 4 is the Significant Hazards Consideration for the proposed change.

In consideration of the proposed change, PSC is attempting to minimize reactor plant shutdowns between refueling intervals. The performance of the Loss of Offsite Power test heretofore has required the plant to be shutdown at 4 to 8 months intervals in order to prevent plant transients involving circulator trip, loop shutdown (s) and reactor scram as safe shutdown loads are deenergized and then reenergized by the load sequencers. Many safe shutdown systems are normally operating systems required for plant operation. PSC's proposed change involves a change to SR 5.6.1 such that the demonstration of voltage sensing circuits on safety related buses, auto-start- capability of the standby diesel generators and auto-sequencing of safe shutdown loads is to be performea at refueling not to exceed 18 month intervals. PSC proposes a test at approximate 6 month intervals to test diesel auto-start capability upon a simulated loss of bus voltage. PSC considers the change in proposed testing to be consistent with an overall improvement in plant reliability as 00 8609300248 860924 I{

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P-86549 Page 2 September 24, 1986 unnecessary shutdowns are minimized while preserving confidence in emergency power systems performance.

In accordance with the provisions of 10CFR170, an application fee for

$150.00 is enclosed.

If you have any questions or comments concerning the enclosed information, please call Mr. M. H. Holmes at (303) 480-6960.

Very truly,yours ,,

. b(&w

. W l iams, J .

Vice President Nuclear Operations R0W/ REC / paw Attachments cc: Albert J. Hazle Colorado Department of Health

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UNITED' STATES OF AMERICA NUCLEAR REGULATORY COMMISSION In the Matter )

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Public Service Company of Colorado ) Docket No. 50-267 Fort St..Vrain Unit No. 1 )

AFFIDAVIT R. O. Williams, Jr., being first duly sworn, deposes and says:

That he is Vice President, Nuclear Operations, of Public Service Company of Colorado, the Licensee herein, that he has read the foregoing Applicadon of Amendment to Appendix A of Facility Operating License and knows the contents thereof, and that the statements and matters set forth therein are true and correct to the best of his knowledge, information and belief.

k Rf 0. Williams, Jr.

lif Vice President Nuclear Operations STATE OF h/01M/M )

COUNTY OF Mnatz2/

Subscribe and sworn to before me, a Notary Public on this 0 day of iltnt/j)t/wd 95 , 1986.

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My commission expires [ #dnJ8.fA ,198[.

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