ML20083K203

Forwards Response to 840222 Summary of Generic Problems & cross-examination Questions Re Facility Independent Assessment Program.Piping Segment AB-1-70 Reanalyzed by Gibbs & Hill & Original Engineering Judgement Verified

ML20083K203
Person / Time
Site:	Comanche Peak
Issue date:	03/15/1984
From:	Williams N CYGNA ENERGY SERVICES
To:	Ellis J Citizens Association for Sound Energy
References
84042.07, NUDOCS 8404160097
Download: ML20083K203 (10)

Text

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101 Cahfornia Stieet. Swte 1000 San Francisco. CA 94111-5894 l

March IS,1984 84042.07

\\ n Mrs. Juanita Ellis, President Citizens Association for Sound Energy 1426 South Polk Dollos, Texas 75224 Comanche Peak Steam Electric Station Independent Assessment Program -

Subject:

Response to CASE Questions (I) Brief Summary of Generic Froblems from CASE Witness Jack Doyle,

Reference:

2/22/84.

(2) Brief Summary of Cross-examination Questions from CASE Witness Mark Walsh,2/22/84.

Dear Mrs. Ellis:

Enclosed please find our responses to reference (t) item 10; and reference (2) items 2 a Further responses will be forthcoming.

Very truly yours,

~ l <h.

J.))4 #m Noney H. Williams Project Monoger NHW:eam

Enclosures:

Attachment A, Partial Responses to CASE Questions cc:

See ottochment 8404160097 840315 I

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San Francisco Sotton Checago &chiand

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March IS,1984 Mrs. J. Ellis Attachment Response to CASE Ouestions Nicholas S. Reynolds, Esq.

Mr. John T. Collins Bishop, Libermon, Cook, Purcell & Reynolds U.S. NRC, Region IV 1200 Seventeenth Street, N.W.

611 Ryan Plaza Drive 3

Washington, D.C. 20036 Suite 1000 Arlington, Texas 76011 Robert Wooldridge, Esq.

Worsham, Forsythe & Sampels Mr. Lonny Alan Sinkin 2001 Bryan Tower

!!4 W.7th, Suite 220 Dollos, Texas 75201 Austin, Texas 78701 Mr. Homer C. Schmidt B. R. Clements Monoger - Nuclear Services Vice President Nuclear Texas Utilities Generating Company Texas Utilities Generating Company 2001 Bryan Tower Skyway Tower Dollos, Texas 75201 400 North Olive Street L.B. 81 Mr. H. R. Rock Dollas, Texas 75201 Gibbs & Hill, Inc.

393 Seventh Avenue Peter B. Bloch, Esq.

New York, New York 10001 Chairman, Atomic Safety and Licensing Board U.S. Nuclear Regulatory Commission Mr. A. T. Parker 4350 East / West Highway,4th Floor Westinghouse Electric Corporation Washington, D.C. 20814 P.O. Box 355 Pittsburgh, Pennsylvanio 15230 Dr. Walter H. Jordon 881 W. Outer Drive Renea Hicks Ook Ridge, Tennessee 37830 Assistont Attorney General Environmental Protection Division Dr. Kenneth A. McCollom P.O. Box 12548, Capitol Station Dean, Division of Engineering Architecture and Austin, Texas 78711 Technology Oklahoma State University Mr. James E. Cummins Stillwater, Oklahoma 74074 Resident inspector / Comanche Peak Nuclear Power Station Stuart A. Treby, Esq.

c/o U.S. Nuclear Regulatory Commission Office of the Executive Legal Director U.S. Nuclear Regulatory Commission P.O. Box 38 Glen Rose, Texas 76043 Washington, D.C. 20555 i Mrs. S.~ Burwell Mr. J. B. George Licensing Project Monoger Texas Utilities Generating Company U.S. Nuclear Regulatory Commission Comanche Peak Steam Electric Station 7920 Norfolk Avenue Highway FM 201 Bethesda, Maryland 20014 Glen Rose, Texas 76043 Mr. H. Schmidt Mr. David H. Wade Texas Utilities Generating Company e/o Westinghouse 4901 Fairmont Avenue 2001 Bryan Tower Bethesda, Maryland 20814 Dollos, Texas 75201 Mr. David R. Pigott Orrick, Herrington, & Sutcliffe 600 Montgomery Street Son Francisco, California 94llI

Comanche Peak ASLB Hearings Response to CASE Questions Question No.: Doyle # 10 Exhibit No.: 893 l

I A CASE Question Hos this been Changing from o flore weld to o fillet weld induces flonge bending.

oddressed by Cygno?

2A Cygno Interpretation The calculation sheet ottoched to Exhibit 893 states that the weldme brocket and the beam flonge was changed from o fillet to o flore/ bevel weld This fillet-change results in a 90 degree re-orientation of the weld lines, from to-flore Did Cygno evoluote the perpendicutor-to-porallel to the web of the wide ffonge.

odditional loods on the flonge?

/

3A Response Cygno judged that this re-orientation would not cause on overstress in the following calculation verifies that judgement:

ct-6 r% s-~.

<p keport No.5t.5-079 0015325 I

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hie suess e.75( e.1932.350 ps;l e 24.767 ps;

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is.3s2 ( 26.242 ps:

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1576

Comanche Peak ASLB Hearings Response to CASE Questions Question No.: Wolsh ('2 Exhibit No.: None 1.0 CASE Question Observat*on Record PS-02-01. The applicont did not consider shear cone interactio odjacent bolts.

2.0 Cygno Interpretation Cygno Observation PS-02-01 was written to evoluote on apparent discreponcy drowing information and calculations, os related to onchor bolt embedment length shear cone interoction also oddressed?

3.0 Response Observation PS-02-01 identifies a concern with the calculation of bo revealed that the embedment was provided to the co length which is specified on the drawing, in addition, the greater of the two e derived from either the construction specification or the drawing governs.

Although not related to this concern, Cygno did check both the analyses and Minimum bolt spacing criterio are to ensure that bolt spocing requirements were met.

necessary to assure full development of bolt copocity as specified by the monofoc Maximum bnft capacity is realized when the concrete shear cone is fully dev without inte ferences. Interoction or overlopping between odjacent bolt shear c 1

reduce beit copocity as a function of bolf diameters. The applicont properl these effects.

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Comanche Peak ASLB Hearings Rewonse to CASE Questions Questim No.: Walsh ilI 1

Exhibit No.: None Pope 1 I.0 CASE Question i

Pipe stress checklist, note 3, item c:

1)

What is the basis for considering that the ef fects were negligible?

2)

What pipe stress run did Cygno look of, since the inclined food was used in the design of support RH-I-010-003-522R?

2.0 Cygno interpretation Pipe stress checklist (Pl.02), note 3, states the following:

3. The following supports were modeled along the coordinate axis rather than inclined. The impoet is negligible.

c. FH-l-010-003-522R @ dato point 1253 (S.6 degrees)

b. SI-t-042-001-522R of dato point 793 (7.5 degrees)

What was the basis for concluding that support RH-t-010-003-522R was odequate?

t 3.0 Response Support RH-l-010-003-522R is a simple restroint, inclined 8.6 degrees from o line drawn Cyg* judged that this small inclined ongle would not perpendicular to the pipe.

significontly offect the support design or the piping onalysis. This judgement was ba on the following considerations:

the fabrication tolerance is 5 degrees, therefore the misalignment is only 3.6 o

degrees beyond tolerance.

the antal restroint lood will increase by I/ cosine 8.6 degrees = 1.0ll or 1%.

e I

in order to verify the odequacy of this judgement, Cygno requested that Gibbs & Hill reonelyre piping segment AB-t-70. For this reonolyis, the piping model was revised to include the following:

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. Comanche Peak ASLB Hearings Response to CASE Questions Question No.: Walsh #11 Exhibit No.: None Page 2 i

Supports RH-l-010-003-522R and SI-t-042-001-522R were modeled with skew e

angles of 8.6 and 7.5 degrees, respectively, Support RH-l-Ol0-003-522R was modeled as two trunnions with snubbers e

located 7 inches from the pipe centerline.

Support RH-l-064-010-522R was modeled l'-4" west of the elbow.

e The results of this reonolysis are summarized below:

I Maximum System Stress (psi)

ASME Equation Old New 8

9039 9039 9 (upset) 21094 21103 9 (6mergency) 24451 24463 22883 22883 10 27881 27881 ll i

Support Loads,(ibs)

Normal Upset Emergency Allow.

Old New Old New Old New RH-l.010-003-522R 1705 1459 3534 4519 3967 5189 15700 105 164

-1724 -28?4

-2756 -3565

-15700 I

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Comanche Peck ASLB Hearings Response to CASE Questions Guestion No.: Walsh iliI Exhibit No.: None Pope 3 Nozzle Loads (Ibs)

Old New Load 3084 2541 Allowat -

3120 3120 Ratio 0.98 0.81 Therefore, the correctness of the originol engineering judgement is verified. Enclosure WIl-l contains the computer output for this reonofysis.

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