ML19284A642

Summary of 790213 Meeting in Bethesda,Md W/Tx Utils Generating Co to Discuss NRC Requirements Re Overhead Cranes & Pipe Breaks Outside Containment

ML19284A642
Person / Time
Site:	Comanche Peak
Issue date:	02/27/1979
From:	Burwell S Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 7903150140
Download: ML19284A642 (4)

Text

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DOCKET NOS. 50-445/50-446 APPLICANT: TEXAS UTILITIES GENERATING COMPANY FACILITY:

COMANCHE PEAK STEAM ELECTRIC STATION, UNITS 1 & 2

SUMMARY

OF FEBRUARY 13, 1979 MEETING ON AUXILIARY SYSTEMS BRANCH QUESTIONS A meeting was held with representatives of the Texas Utilities Generating Company on February 13, 1979 in Bethesda, Maryland.

Thc purpose of the meeting was to discuss NRC staff requirements relating to overhead cranes and to pipe breaks outside containment. The applicant has responded to the Auxiliary Systems Branch questions on these two matters in FSAR Amend-ment 4, but is studying supplementing these responses in a future FSAR Amendment. A meeting attendance list is enclosed.

The applicant responded to Question 010.10 concerning the fuel building overhead crane. We discussed with the applicant our requirements for all overhead crane handling systems. We take the position that a crane design which prohibits the movement of heavy loads over irradiated fuel or safety related equipment is preferable to a crane design confoming to Regulatory Guide 1.104, " Overhead Crane Handling Systems for Nuclear Power Plants."

The fuel building overhead crane is an example of the preferred design.

The polar crane inside containment must have unrestricted travel to per-fom its design functions; i.e., to remove the vessel head. With respect to crane handling accidents inside containment, we advised that a major Reactor part of our revicw of the Westinghouse topical report, WCAP-9198, Vessel Head Drop Analysis," is completed. We anticipate the remaining review will confirm that the head drop does not result in a radiological release or compromise required safety related structures or systems.

Other crane handling accidents within the containment can be shown to be enveloped by the fuel handling accident inside containment. The applicant may adopt the WCAP-9198 topical report, or alternatively provide a polar crane conforming to Regulatory Guide 1.104. The applicant will review the alternatives and respond in a future FSAR Amendment to the fuel handling system description.

The overhead crane in the service water intake structure was also discussed.

We advised that service water flow must be assured assuming a crane handling accident during maintenance on the service water pumps; or alter-The natively a crane handling accident must be precluded by design.

applicant will review the movement of equipment within the service water intake structure, make design modifications if necessary, and confirm in a future FSAR Amendment that a crane handling accident cannot result in a total loss of service water.

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rrn ? 71970 We discussed the applicant's response to Question 010.7 concerning a require-ment to consider the environmental effects (pressure, temperature, humidity and flooding) that would occur within the main steam and feedwater valve subcompartments outside containment as a consequence of an assumed crack in one of the main steam or feedwater lines. As part of that requirement we requested an analysis of the pressure buildup in these subcompartments and a confirmation that the consequences of such a crack would not jeopardize the safe shutdown of the station. The applicant stated that the main steam and feedwater lines in these subcompartments are " super-pipe"; i.e., designed to low stresses, conservative shapes, and high quality requirements. The applicant also comented that the above design consideration was not a requirement at the construction permit review.

We advised the applicant that he must address the consequences of steam leaks in these subcompartments. The applicant will study the matter further and may request a meeting on this subject in the future.

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J Sp6ttswood B. Burwell Light Water Reactors Branch No. 2 Division of Project Management

Enclosure:

Attendance List ces w/ enclosure:

See next page

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Texas Utilities Generating Company

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Nicholas S. Reynolds, Esq.

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Debevoise & Liberman 1200 Seventeenth Street Washington, D.C.

20036

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Spencer C. Relyea, Esq.

Worsham, Forsythe & Sanpels 2001 Bryan Tower 5

Dallas, Texas 75201 l

Mr. Homer C. Schmidt j.,

Project Manager - Nuclear Plants Texas Utilities Generating Company

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2001 Bryan Tower Dallas, Texas 75201 e

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Mr. H. R. Rock

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Gibbs and Hill, Inc.

393 Seventh Avenue l

New York, New York 10001

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Mr. G. L. Hohmann

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. j Westinghouse Electric Corporation P. O. Box 355 Pittsburgh, Pennsylvania 15230 Richard W. Lowerre, Esq.

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' r Of fice of the Attorney General l

P. O. Box 12548 l

Austin, Texas 18711 Ms. Nancy Holdam Jacobson Coordinator, CFUR g

1400 Hemphill Street Forth Worth, Texas 76104 Mrs. Juanita Ellis, President CASE P. O. Box 4123 Dallas, Texas 75208 J

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Mr. R. J. Gary Executive Vice President

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and General Manager Texas Utilities Generating Company 4

2001 Bryan Tower a

Dallas, Texas 75201

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ENCLOSURE 7

ATTENDANCE LIST

, COMANCHE PEAK STEAM ELECTRIC STATION FEBRUARY 13, 1979 NRC - STAFF S. B. Burwell P. C. Hearn D. C. Fischer

_ TEXAS UTILITIES GENERATING COMPANY C. K. Feist B. S. Dacko e

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