ML20087N093

Forwards Request for Addl Info to Be Transmitted to Cygna. Certificate of Svc Encl.Related Correspondence

ML20087N093
Person / Time
Site:	Comanche Peak
Issue date:	03/29/1984
From:	Ellis J Citizens Association for Sound Energy
To:	Pigott D ORRICK, HERRINGTON & SUTCLIFFE
References
NUDOCS 8404030093
Download: ML20087N093 (4)

Text

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, , pn RELATED CORRECFOMDEffCE C A S E (CITIZENS ASSN. FOR SOUND ENERGY)

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9 March 29, 1984 UR -2 417 42 crr:

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11:j w Q:, F David R. Pigott, Esq.

Orrick, Herrington, & Sutcliffe 600 Montgomery Street San Francisco, California 94111

SUBJECT:

In the Matter of et al.

Texas Utilities (Comanche PeakElectric Company, Steam Electric Stat Ton, Units 1 and 2)

Docket No. 50-445 and 50-446 Request for Additional Information In reviewing Cygna's answers in preparation for next month's hearings, Messrs.

Walsh and Doyle have some additional information which they need from Cygna, as discussed on the attached sheets.

Sincerely, CASE (Citizens Association for Sound Energy) bb l

6 rs.) Juanita Ellis President l Attachments Service List - see attached l

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l 8404030093 840329 PDR ADOCK 05000445 G PDR n

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3/29/84 CASE to Cygna Requ:st for Additional Information Doyle #4:

Please provide documentation from which the answer provided by Cygna was derived.

Doyle #8:

Please provide a copy of the drawing of the rear bracket in question, which indicates the 1-1/4" radius.

Doyle #15:

Please provide the math model used, as well as the input for the finite analysis.

Doyle #18:

Please provide the source and document (s) for the information contained in tables 1 and 2 on enclosure D18-1.

Walsh #7: .

1 (a) Please refer to CASE Exhibit 889, especially pages 140-143. An analysis is done to determine the ' equivalent K for a column. The analysis shows the K value should be 1.2. The designer chose to use .8, and he stated the reason why; one of the reasons he stated is that the base plate is not actually a pin connection but instead is a fixed. connection. If the designer chose to use the fixed connection so that the frame does not fail due to column buckling, the frame should have been analyzed from the beginning as a fixed connection (i.e., able to resist moments at the base plate).

When the designer decided to use the .8 value for K, the stress ratio became

.991, as shown on a previous ' sheet within CASE's Exhibit 889. The AISC code does not allow ~ columns to have a K1/r greater than 200. Utilizing a K value of .8, the Kl/r is 173. U tilizing the calculated K value which is shown on pages 140-143 of Exhibit 889, = 259, this would make the support insufficient in regards to the code.

(b) In reviewing the calculations for bending stresses within the channels that are in direct contact with the cable trays (i.e. , the C4X7.25), there has been no reduction in the section modulus for the hole'where the bolts go through the channel flange. Due to the hole, the cross-sectional area of the flange is reduced by more than 50%. Also, the hole that is made through the flange is in violation of the AISC code requirements for an edge distance. Further, the cal-culations have neglected to consider the torsional effects within the channel due ,

to the cable tray s not . loading the channel through the shear center.

UNITED STATES OF AMERICA NUCLEAR REGULATORY COMMISSION BEFORE THE ATOMIC SAFETY AND LICENSING BOARD In the Matter of l

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1 TEXAS UTILITIES GENERATING l Docket Nos. 50-445 and COMPANY, et al. l 50-446 I

(Comanche Peak Steam Electric Station i Station, Units 1 and 2) l CERTIFICATE OF SERVICE By my signature below, I hereby certify that true and correct copies of CASE's 3/29/84 letter to Cygna with attachments, Request for Additional Infonnation have been sent to the names listed below this 29th day of March , 198-4, by: Express Mail where indicated by

• and First Class Mail elsewhere.

• Administrative Judge Peter B. Bloch Atomic Safety and Licensing Board U. S. Nuclear Regulatory Commission Panel 4350 East / West Highway, 4th Floor U. S. Nuclear Regulatory Commission Bethesda, Maryland 20814 Washington, D. C. 20555 Dr. Kenneth A. McCollom, Dean Alan S. Rosenthal, Esq., Chairman Division of Engineering, Atomic Safety and Licen:;ing Appeal Architecture and Technology Board Oklahoma State University U. S. Nuclear Regulatory Commission Stillwater, Oklahoma 74074 Washington, D. C. 20555 Dr. Walter H. Jordan Dr. W. Reed Johnson, Member 881 W. Outer Drive Atomic Safety and Licensing Appeal Oak Ridge, Tennessee 37830 Board U. S. Nuclear Regulatory Commission

• Nicholas S. Reynolds, Esq. Washington, D. C. 20555 Bishop, Liberman, Cook, Purcell

& Reynolds Thomas S. Moore , Esq. , Member 1200 - 17th St., N. W. Atomic Safety and Licensing Appeal Washington, D. C. 20036 Board U. S. Nuclear Regulatory Commission

• Geary S. Mizuno, Esq. Washington, D. C. 20555 Office of Executive Legal Director U. S. Nuclear Regulatory Commission Atomic Safety and Licensing Appeal Maryland National Bank Building Panel 7735 Old.Georgetown Road - Room 10105 U. S. Nuclear Regulatory Commission Bethesda, Maryland 20814 Washington, D. C. 20555 L

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Docketing and Service Section

• Ms. Nancy H. Williams . .. .

Project Manager ~

(3 copies) _

Office of the Secretary Cygna Energy Services -

U. S. Nuclear Regulatory Connission 101 California Street, Suite 1000 /

Washington, D. C. 20555 San Francisco, Califorsia 94111-5094 Renea Hicks Esq.

• David R. Pigott. Esq. .,, ; , /

Assistant Attorney General Orrick, Herrington, & Luttlitfe

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Environmental Protection Division 600 Montgomery Street' / ' "?

Supreme Court Building San Francisco, California .,94111 f"N Austin, Texas 9' 78711 John Collins .

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Regional Administrator, Region IV -

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U. S. Nuclear Regulatory Conmission __

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611 Ryan Plaza Dr., Suite 1000 .

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Arlington, Texas 76011 -

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Dr. David H. Boltz N

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'b 2012 S. Polk Dallas, Texas " N 75224 -

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Lanny A. Sinkin T#

114 W. 7th, Suite 220 '

Austin, Texas 78701 ,

Michael D. Spence, President . -.,

Texas Utilities Generating Company - --

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.t)f's.1 Juanita Ellis, President CASE (Citizens Association for Sound: Energy) 1426 S. Polk Dallas, Texas 75224 - 4 214/946-9446 .

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