ML20150C298

Forwards Request for Addl Info Re Review of 860626 & 870331 Submittals Concerning Role of Operators in Mitigating High Energy Line Breaks.Response Requested within 60 Days

ML20150C298
Person / Time
Site:	Fort Saint Vrain
Issue date:	06/24/1988
From:	Heitner K Office of Nuclear Reactor Regulation
To:	Robert Williams PUBLIC SERVICE CO. OF COLORADO
References
TAC-61894, NUDOCS 8807120423
Download: ML20150C298 (5)

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June' 24,'1988 Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Company of Colcrado Post Office Box 840 Denver, Colorado 80201-0840

SUBJECT:

ROLE OF OPERATORS IN MITIGATING HIGH ENERGY LINE BREAKS AT FORT ST. VRAIN (TAC N0. 61894)

We are continuing our review of your submittals dated June 26, 1986 and January 15 and March 31, 1987. These submittals discuss the role of the operators in mitigating high energy line breaks (HELB's) at Fort St. Vrain.

The staff has determined that additional infonnation is required to complete this review.

Please provide the information requested in the er. closure within 60 days of the date of this letter.

The information requested in this letter affects fewer than 10 respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Kenneth L. Heitner, Project Manager Project Directomte - IV Division of Reactor Projects - III, IV, V and Special Projects

Enclosure:

As stated cc w/ enclosure:

See next page DISTRIBUTION Docket File, ? NRC PDR Local PDR PD4 Reading L. Rubenstein J. Calvo P. Noonan K. Heitner OGC-Rockville E. Jordan B. Grimes ACRS(10)

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Docket No. 50-267 Mr. R. O. Williams, Jr.

Vice President, Nuclear Operations Public Service Company of Colorado Post Office Box 840 Denver, Colorado 80201-0840

SUBJECT:

ROLE OF OPERATORS IN MITIGATING HIGH ENERGY LINE BREAKS AT FORT ST. VRAIN (TAC NO. 61894)

We are continuing our review of your submittals dated June 26, 1986 and January 15 and March 31, 1987. These submittals discuss the role of the cperators in mitigating high energy line breaks (HELB's) at Fcrt St. Vrain.

The staff has determined that additional information is required to complete this review.

Please provide the infonnation requested in the enclosure within 60 days of the date of this letter.

The information recuested in this letter affects fewer than 10 respondents; therefore, OVB clearance is not required under P.L. 9E-511.

Sincerely, N' f0R Kenneth L. Heitner, Project Manager Project Directorate - IV Division of Reactor Prcjects - !!!,

IV, V and Special Projects

Enclosure:

As stated cc w/ enclosure:

See next page I

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1 Mr. R. O. Williams, Jr.

Public Service Company of Colorado Fort St. Vrain cc:

Mr. D. W. Warembourg, Manager Albert J. Hazle, Director Nuclear Engineering Division Rediation Control Division Public Service Company Department of Health of Colorado 4210 East lith Avenue P. O. Box 840 Denver, Colorado 80220 Denver, Colorado 80201-0840 Mr. David Alberstein, 14/159A Mr. R. O. Williams, Jr. , 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 80201-0840 16805 Weld County Road 19-1/2 Platteville, Cclorado 80651 Senior Resident inspector U.S. Nuclear Regulatory Comission Mr. R. F. Walker P. O. Box 640 Public Service Company of Colorado Platteville, Colorado 80651 Post Office Box 840 Denver, Colorado 60201-0840 Kelley, Stansfield & 0'Dennell Public Service Company Puildi..g Commitment Centrol Program Room 900 Ccordinator 550 15th Street Public Service Cerrpany of Colorado Denver, Colorado 80?O2 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 Comissioners of Weld County, Colorado Greeley, Colorado 80631 l

Regional Representative Radiation Programs Environmental Protection Agency 1 Denver Place 999 18th Street, Suite 1300 Denver, Colorado 80202-2413 l

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Enclosure REQUEST FOR ADDITIONAL INFORMATION FORT ST VRAIN DOCKET NO. 50-267 i l

For actions that must be taken in a potentially harsh environment, please '

provide the following information.

1) Manual Valve Manipulations What reference, if any, is utilized in identifying valves to be manipulated?

What are the physical characteristics (e.g., handle type / shape, size, 1 direction of turn to open/close, and number of revolutions) of the manual I valves to be manipulated?

How difficult are the valves to operate (e.g., force required)?

How feniliar would the operators be with the specific required tasks?

How and where are the subject valves labeled (e.g., name and/or part number)? J How are the cpen and closed positions of the valves identified?

?) Instrument Readings Does verification of steam generator outlet pressure and temperature require actual reading of meter values? Describe how this is l accerplished in the anticipated environment.

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How accurately must they be read? How often during the course of the recovery from the HELB?

3) Operator Prc'tection and Comunication Are there any abnormal or aided breathing requirements that should be considered?

What protective garments will be worn, and are the operators familiar with their use?

Are the tasks perfomed by one person or a team? If a team, describe proposed division of duties.

What are the communication recuirements during the tasks?

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4) Environmental Conditions Please provide information on the temperature and humidity (and, if available, noise level) that operators will encounter when entering the post-HELB environment?

What are the ambient illumination conditions in the immediate area where required tasks are to be performed?

Would sufficient light be available to perform the required post-HELB tasks?

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