ML20106B531

Advises That Util Will Perform Turbine Load Rejection from Full Load Test at End of Cycle 4.Tech Spec Amend Will Be Submitted

ML20106B531
Person / Time
Site:	Fort Saint Vrain
Issue date:	01/25/1985
From:	Brey H PUBLIC SERVICE CO. OF COLORADO
To:	Johnson E NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION IV)
References
FRN-50FR27508 P-85007, TAC-55294, NUDOCS 8502110660
Download: ML20106B531 (2)

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public Service Company POdendo l

P.O BOX 840 DENVER. COLORADO 80201 January 25, 1985 l

Fort St. Vrain Unit No.,1 P-837 Regional Administrator 3 S @ 3 0.W M %

Region IV )

U. S. Nuclear Regulatory Commission pg , g 611 Ryan Plaza Drive, Suite 1000 (

Arlington, Texas 76011 ,\_ ,

fj Attn: Mr. Eric Johnson Docket No. 50-267

SUBJECT:

Fort St. Vrain B-0 Start-up Test (Sequence 79-Turbine Load Rejection From Full Load)

REFERENCES:

1.) PSC Letter, Warembourg to Wagner, dated 8-30-83 (P-83294) 2.) PSC Letter, Warembourg to Wagner, dated 1-13-84 (P-84025)

Dear Mr. Johnson:

In the referenced letters, Public Service Company of Colorado (PSC) had contended that the Sequence 79 B-0 Start-Up Test was no longer required due to the response of the plant during the November 9, 1981, transient. Analyses of the data from this trip has concluded that:

1.) Plant response to the circulator / loop 1 trip was well-behaved and well-controlled with few exceptions. No unusual temperature, pressure, or flow excursions were encountered.

2.) Some fluctuations were observed in the deaerator condensate / level control.

3.) The trip of loop may have_ been averted if 'A' circulator overspeed trip had been rate-limited or set at a higher acceptable value.

Note that these conclusions are based on information not normally acquired from the Startup Testing Program.

8502110660 850125 O

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95 -Since this transient did not meet the criteria of sequence 79/ sequence 80 testing, PSC will perform the Turbine Load. Rejection FromL Full Load Test at the end of the current fuel cycle (Cycle 4) providing plant operating conditions permit at that time.

The Technical Specification amendment required to allow performance of the Xenon Stability Test will be. submitted under a separate letter. - , ,

If you have any questions on this matter, please contact Mr. M. H.

Holmes (303) 571-8409.

1 Very Truly yours, H.L. &<y /y /Tyk-try,Q H. L. Brey

' , Executive Staff Assistant, Electric Production HLB /SBH/bj r -

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