ML18030A230

Forwards Request for Addl Info Re Structural Engineering. Final Responses to Be Submitted by 810320

ML18030A230
Person / Time
Site:	Susquehanna
Issue date:	03/16/1981
From:	Tedesco R Office of Nuclear Reactor Regulation
To:	Curtis N PENNSYLVANIA POWER & LIGHT CO.
References
NUDOCS 8103230347
Download: ML18030A230 (5)

Text

Qg 16 1S81 Docket Nos.:

50-387 and~50-388 Mr. Norman W. Curtis Vice President - Engineering and Construction Pennsylvania Power and Light Company Two North Ninth Street Allentown, Pennsyl vania 13101

.DISTRIBUTION:

LDocket Fi'l~e LB51 Rdg DEisenhut BJYoungblood RStark MRushbrook RTedesco RVollmer TMurley DRoss RHartfield, MPA VNoonan OELD OIE (3) bcc:

TERA NRC/PDR L/PDR NSIC TIC ACRS (16)

Subject:

Susquehanna Steam Electric Station, Units Nos.

1 and 2 - Request for Additional Information As a result of our review of your application for operating licenses for the Susquehanna Steam Electric Plant, w'e find that we need additional -fnformatfon fn the area of Structural ngfneerfng.

The enclosed questions were the subject of Febuary 19, 1981 conference call with PP8L and Bechtel and were telecopfed to PP8L on March 6, 1981.

Please provide your final responses by March 20, 1981.

If your desire any discussion or clarification of the information requested, please contact R.

M. Stark, Project Manager, (3-")-492-7238).

Sincerely,

~liel Nfgned bf Robert L. Yodeeoo Robert L; Tedesco, Assistant Director for Licensing Division of Licensing

Enclosures:

As stated cc:

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Mr. Norman W. Curtis Vice President - Engineering and Construction Pennsylvania Power and Light Company 2 North Ninth Street Al 1 entown, Pennsyl vani a 18101 CC:

Mr. Earle M.

flead Project Engineering Manager Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsyl vani a 18101 Jay Silberg, Esq.

Shaw, Pi ttman, Potts Trowbridge 1800 M Street, N.

W.

Washington, D.

C.

20036 Mr.'William E. Barberich, Nuclear Licensing Group Supervisor Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsyl vania 18101 Edward M. Nagel, Esquire General Counsel and Secretary Pennsylvania Power

& Light Company 2 North Ninth Street Allentown, Pennsyl vani a 18101 Bryan Snapp, Esq.

Pennsylvania Power

& Light Company 2 North Ninth Street Al 1 entown, P'ennsyl vani a 18101'obert M. Gallo Resident Inspector P.

0.

Box 52 Shickshinny,. Pennsylvania 18655 John L. Anderson Oak Ridge National Laboratory Union Carbide Corporation Bldg. 3500, P. 0.

Box X

Oak Ridge, Tennessee 37830 Gerald R. Schultz,

Esq, Susquehanna Environmental Advocates P. 0.

Box 1560 Wikes-Barre,'ennsylvania 18703 Mr. E.B.

Poser Project Engineer Bechtel Power Corporation P.

0.

Box 3965 San Francisco, Cali fornia 94119 Matias F. Travieso-Diaz, Esq.

Shaw, Pittman, Potts Trowbridge 1800 M Street, N.

W.

Washington, D.

C.

20036 Dr. Judith H. Johnsrud Co-Di rector Envi ronmenta1 Coal ition on

. Nuclear Power 433 Orlando Avenue State College, Pa 16801.

Mr. Thomas M. Gerusky, Director Bureau of Radiation Protection Department of Environmental Resources Commonwealth of Pennsylvania P.

0.

Box 2063 Harrisburg, Pa 17120 Ms. Colleen Marsh'ox

538A, RD44 Mountain Top, PA 18707 Mr. Thomas J. Halligan Correspondent The Citizens Against Nuclear Danagers P. 0.

Box 5 Scranton Pennsylvania 18501 Mr. J.W. Millard Projec t I 1Ana ger Mai'i Code 394 General Electric Company 175 Curtner Avenue San Jose, California 95125 Robert W. Adler Dept. of Environmental Resources 505 Executi've House P.

O'.

Box 2357 Harrisburg, Pennsylvania 15120

II

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SUSQUEHANNA SES UNITS 1

AND 2 DOCKET NUhBERS 50-387 AHD 50-388 STRUCTURAL ENGINEERINQ BRANCH OUTSTANDING ISSUES A.

FSAR 1.

The Susquehanna FSAR Section 3.7b.2.1 indicates that both a flexible base model

'and a fixed base model were utilized for the seismic analysis of the containment building.

Discuss and explain the rationale for using two different m'odels for the seismic analysis.

Demonstrate the equivalency of the two models by comparing their dynamic characteristics

.on the results from the two analyses.

2.

In the torsional analysis of the diesel generator building and the ESSW pumphouse, justify the use of a static analysis for a dynamic phenomenon.

3.

Explain why analysis of the torsional effects was not done for the reactor building.

B.

DAR 1.

In Fig. 7-6 which shows dowhcomer 'bracing system details, it appears that the bracing is welded to the liner plate through the use of an embedded plate without any anchorage to the containment concrete wall.

Since the steel liner plate is not a structural component, indicate how th'e pulling forces from the bracing can be resisted and how the leaktight integrity of the liner can be maintained.

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