ML20235F508

Authorizes Operation of Facility at 82% of Full Power.Sers Re Safe Emergency Shutdowns for Reactor Sys & Steam Generators & Effect of Firewater Cooldown on Steam Generator Structural Integrity & ORNL Rept Encl

ML20235F508
Person / Time
Site:	Fort Saint Vrain
Issue date:	07/02/1987
From:	Murley T Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
Shared Package
ML20234C612	List: ML20234C609 ML20235F508 ML20235F515 ML20235F528 ML20235F544
References
TAC-63576, NUDOCS 8707130420
Download: ML20235F508 (2)

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DI TION E. Chan Docket No. 50-267 RL N W 4ocket File NRC PDR Local PDR PD4 RF 4 l Mr. R. O. Williams, Jr. T. Murley D. Crutchfield I

Vice President, Nuclear Operations F. Miraglia F. Schroeder l Public Service Company of Colorado J. A. Calvo P. Noonan P. O. Box 840 K. Heitner 0GC-Bethesda l Denver, Colorado 80201-0840 E. Jordan J. Partlow ACRS (10) South Texas Pf

Dear Mr. Williams:

W. Patton J. Jaudon, RIV J. Gagliardo, RIV E. Johnson, RIV

SUBJECT:

AUTHORIZATION FOR INTERIM OPERATION OF FORT ST. VRAIN AT i 82 PERCENT OF FULL POWER

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By this letter, the Commission is authorizing operation of Fort St. Vrain to exceed 35 percent of full power. In accordance with the commitments contained in your letter dated January 30, 1987 (P-87038) which describes your power ascension plans, you are not authorized to exceed 82 percent of full power. I In support of your request to operate the plant at this higher power level, l you have made numerous submittals as referenced in the enclosed Safety l Evaluations. These submittals have been reviewed by the staff and by our I

contractor, Oak Ridge National Laboratory (ORNL). The evaluation performed by ORNL is summarized in their Technical Evaluation Report (TER) (Enclosure 4).

ORNL reviewed the flow of fire water to the steam generator and evaluated your thermal hydraulic analysis of the cooldown process. Their independent model cal-culations confirm that Safe Shutdown Cooling can be accomplished from 82 percent i of full power without fuel damage. The staff reviewed your analyses concerning I the behavior of the steam generator materials and structures during the Safe Shutdown Cooling. The staff's evaluations have shown your analyses are acceptable (Enclosures 1 through 3).

Your commitments set out in Enclosure 2 to NRC's letter of April 6,1987 remain unchanged. l Sincerely, Original signed by Thomas E. Eurley 8707130420 870702 PDR ADDCK 05000267 Thomas E. Murley, Director p PDR Office of Nuclear Reactor Regulation

Enclosures:

As stated cc w/ enclosure:

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. Mr. R. O. Williams Public Service Company of Colorado Fort St. Vrain CC*

Mr. D. W. Warembourg, Manager Albert J. Hazle, Director Nucle:r Engineering Division Radiation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201 Mr. David Alberstein, 14/159A Mr. R. O. Williams, Acting Manager GA Technologies, Inc. Nuclear Production Division Post Office Box 85608 Public Service Company of Colorado San Diego, California 92138 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Mr. H. L. Brey, Manager Nuclear Licensing and Fuel Division Mr. P. F. Tomlinson, Manager Public Service Company of Colorado Quality Assurance Division P. O. Box 840 Public Service Company of Colorado Denver, Colorado 80201 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Senior Resident Inspector U.S. Nuclear Regulatory Commission - Mr. R. F. Walker P. 0. Box 840 Public Service Company of Colorado Platteville, Colorado 80651 Post Office Box 840 Denver, Colorado 80201-0840 Kelley, Stansfield & 0'Donnell Public Service Company Building Commitment Control Program Room 900 Coordinator 550 15th Street Public Service Company of Colorado Denver, Colorado 80202 2420 W. 26th Ave. Suite 100-D Denver, Colorado 80211 Regional Administrator, Region IV -

U.S. Nuclear Regulatory Commission 611 Ryan Plaza Drive, Suite 1000 Arlington, Texas 76011 Chairman, Board of County Commissioners of Weld County, Colorado Greeley, Colorado 80631 Regional Representative Radiation Programs  ;

Environmental Protection Agency 1 Denver Place 999 18th Street, Suite 1300 Denver, Colorado 80202-2413

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