ML20207J769

Forwards Safety Evaluation & Lasl Technical Evaluation Rept Supporting 840813 Response Re Dynamic Loading of Cracked Fuel Elements.Low Likelihood of Earthquake Resulting in Failure of Cracked Fuel Element Concluded

ML20207J769
Person / Time
Site:	Fort Saint Vrain
Issue date:	12/30/1986
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
Shared Package
ML20207J773	List: ML20207J769 ML20207J779 ML20207J793
References
TAC-49055, NUDOCS 8701080584
Download: ML20207J769 (3)

Text

b December 30,.1986 Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Company of Colorado P. O. Box 840 Denver, Colorado 80201-0840

SUBJECT:

DYNAMIC LOADING 0F CRACKED FUEL ELEMENTS AT FORT ST.. VRAIN (FSV)

We have completed our review of your submittal dated August 13,'1984'(P-84275) concerning dynamic loading of a cracked fuel element at FSV. Part of our technical review was conducted by our contractor, Los Alamos National Laboratory. Their Technical Evaluation Report is enclosed (Enclosure 2).

The conclusion of our review is that there is a very low likelihood of an earthquake resulting in the failure of a cracked fuel element. This also means that subsequent loss of coolant flow through that fuel column is equally unlikely. Even if loss of coolant flow in a fuel. element column 41s postulated, there is reasonable assurance that there would not be a significant release from the plant. Thus, we find your response acceptable, and consider this issue closed. Our Safety Evaluation is enclosed as Enclosure 1.

Sincerely, original signed by Kenneth L. Heitner, Project Manager Standardization and Spec.ial Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation.

Enclosures:

1. Safety Evaluation

2. Technical Evaluation Repo'rt 8701080584 861230 cc w/ enclosures: PDR ADOCK 05000267 See next page $ PDR -

DISTRIBUTION: l

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/ December 30, 1986 Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Compary ,.

of Colorado P. O. Box 840 Denver, Colorado 80201-0840

SUBJECT:

DYNAMIC LOADING 0F CRACKED FUEL ELEMENTS AT FORT ST. VRAIN (FSV)

We have completed our review of your submittal dated August 13, 1984 (P-84275) concerning dynamic loading of a cracked fuel element at FSV. Part of our technical review was conducted by our contractor, Los Alamos National Laboratory. Their Technical Evaluation Report is enclosed (Enclosure 2).

The conclusion of our review is that there is a very low likelihood of an earthquake resulting in the failure of a cracked fuel element. This also means that subsequen.t loss of coolant flow through that fuel column is equally unlikely. Even if loss of coolant flow in a fuel element column is postulated, there is reasonable assurance that there would not be a significant release from the plant. Thus, we find your response acceptable, and consider this issue closed. Our Safety Evaluation is enclosed as Enclosure 1.

Sincerely, WLA Kenneth L. Heitner, Project Manager Standardization and Special Projects Directorate Division of PWR Licensing-B Office of Nuclear Reactor Regulation

Enclosures:

1. Safety Evaluation

2. Technical Evaluation Report cc w/ enclosures:  ;

See next page l

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.. o Mr. R. O. Williams Public Service Company of Colorado Fort St. Vrain cc:

Mr. D. W. Warembourg, Manager Albert J. Hazle, Director Nuclear 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. J. W. Gahm, 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 Colorrdo Denver, Colorado 80201 16805 Weld County Road 19-1/2 Platteville, Colorado 80651 Senior Resident Inspector U.S. Nuclear Regulatory Commission Mr. R. F. Walkar P. 0. Box 840 Public Service Company of Colorado Platteville, Colorado 80651 Post Office Box 840 Denver, Colorado 92138 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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