ML20054C708

Summary of 820205 Meeting W/Util in Bethesda,Md Re Design of safety-related Masonry Walls at Facility

ML20054C708
Person / Time
Site:	Catawba
Issue date:	04/02/1982
From:	Jabbour K Office of Nuclear Reactor Regulation
To:	Office of Nuclear Reactor Regulation
References
NUDOCS 8204210534
Download: ML20054C708 (5)

Text

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APR 2 1982 Docket tios: 50-413 and 50-414 APPLICAtiT:

Duke Power Conpany FACILITY:

Catawba Nuclear Station, Units I and 2

SUMMARY

OF fiEETING ON MASOflRY WALLS CRITERIA On February 5,1982, the NRC staff met in Bethesda with representatives from Duke Power Corpany to discuss Duke's design regarding safety-related masonry walls at Catawba Station, Units 1 and 2.

A list of attendees is attached (Enclosure 1).

Duke's representatives iritiated the discussion by stating that Catawba design started in 1975 and was completed in 1977. Construction is presently complete for about 907. of the approxinately 4400 linear feet of Category I nasonry block walls as shown in the drawings transmitted to NRC on Janaury 20, 1982. All of the safety-related walls are located in the auxiliary building and their primary purpose is for fire protection, shielding or partition. No significant attach-ments are made to the block itself; however, light attachments (generally less than 200 lbs) are occasionally made to the vertical steel members.

'n the design of these walls, each course has a layer of durowall reinforcing and the blocks are framed in wide flange steel nenbers as shown in the above-referenced drawings.

Anong the walls yet to be constructed, half (i.e., 200 ft) represents extension of walls whose construction has already started and the other half represents new construction.

Duke's representatives also stated that the working stress method and the ceiling response spectrun were used for the wall design. The materials met Duke's speci-fications and QA/QC requirenents. Duke's staff recently perforned a finite element analysis for a wall panel using six different nodels. The stresses were low compared to allowables as per ACI 531-79. Duke assumed uncracked section in the calculations.

The NRC staff suggested the following for those walls not yet started:

1.

Add a horizontal rebar for each bedjoint.

2.

For spans greater that 5 feet, add one #4 rebar between the wide flange columns and grout.

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n i In addition, the NRC staff suggested the following criteria for Duke's finite 4

element analysis:

1.

Use cracked section noment-of-inertia.

2.

Use QA/QC procedures in accordance with Appendix B to 10 CFR Part 50, 3.

75 damping for cracked section is acceptable.

4 Use three corponent earthquake in accordance with R.G.1.92.

5.

Provide the basis for in-plane shear strength.

i 6.

Consider eccentric loads.

7.

Provide the column analysis.

8.

Assess wall behavior under safe shutdown earthquake assuming certain cracks exist.

9.

Provide stress results obtained from the finite element analysis and corpare to criteria.

Duke agreed to add rebars for new wall constructiose, and to perform the finite elenent analysis in accordance with the flRC criteria. Duke will subrait the stress results by April 2,1982.

s Kahtan N. Jabbour, Project fianager Licensing Branch No. 4 Division of Licensing

Enclosure:

As stated cc: See next page

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CATAWBA Mr. William 0. Parker Vice President - Steam Production Duke Power Conpany P.O. Box 33189 Charlotte, North Carolina 28242 cc:

William L. Porter, Esq.

North Carolina Electric Membership Duke Power Company Corp.

P.O. Box 33189 3333 North Boulevard Charlotte,. North Carolina 28242 P.O. Box 27306 J. Michael McGarry, III, Esq.

Debevoise & Libernen Saluda River Electric Cooperative.

1200 Seventeenth Street, N.W.

Inc.

Washington, D. C.

20036 207 Sherwood Drive Laurens, South Carolina 29360 North Carolina MPA-l' Mr. Peter K. VanDoorn P.O. Box.95162 Raleigh, North Carolina 27625 Route ?, Box 179N York, South Carolina 29745 Mr. F. J. Twogood Power Systems Division James P. O'Reilly, Regional Administrator Westinghouse Electric Corp.

U.S. Nuclear Regulatory Commission, P.O. Box 355 Region II Pittsburgh, Pennsylvania 15230 101 Marietta Street, Suite 3100 Atlanta, Georgia 30303 Mr. J. C. Plunkett, Jr.

NUS Corporation

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Robert Guild, Esq.

2536 Countryside Boulevard 314 Pall Mall Clearwater, Florida 33515 Columbia, South Carolina 29201 Mr. Jessd L. Riley, President Palmetto Alliance Carolina Environmental Study Group 2135 1/2 Devine Street 854 Henley Place Columbia, South Carolina 29205 Charlotte, North Carolina 28208 Richard P. Wilson, Esq.

. Assistant Attorney General S.C. Attorney General's Office P.O. Box 11549 Columbia, South Carolina 29211 Mr. Henry Presler, Chairman Charlotte - Mecklenburg Environmental Coalition 943 Henly Place Charlotte, North Carolina 28207

LIST OF ATTEliDEES FEllRIJARY S,1982 NRC Duke Power Conpany E. Adensan R. Sharpe K. Jabbour H. Childers F. Schauer D. Kulla D. Jen9

14. Green N. Chokshi I. Pearce L. Yang J. Lenahan l

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I MEETING

SUMMARY

DISTRIBUTION Do Nos. 5 13/414 G. Lear 7PDR S. Pawlicki Local PDR V. Benaroya TIC /NSIC/ TERA Z. Rosztoczy LB #4 r/f W. Haass H. Denton D. Muller Apg 2 $92 E. Case R. Ballard D. Eisenhut W. Regan R. Purple R. Mattson B. J. Youngblood P. Check A. Schwencer

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F. Miraglia F. Rosa J. Miller W. Butler i

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A. Thadani E. Adensam D. Tondi K. Jabbour J. Kramer F. Schauer D. Vassallo D. Jeng P. Collins N. Chokshi D. Ziemann L. Yang F. Congel J. Lenahan J. Stolz M. Srinivasan l

R. Baer E. Adensam

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Project Manager K. Jabbour bcc: Applicant & Service List Licensing Assistant M. Duncan l

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