ML20150C253

Forwards Request for Addl Info Re 880302 Request for Amend to Tech Spec That Would Reduce Containment Tendon Design Stresses.Response Requested within 60 Days

ML20150C253
Person / Time
Site:	Byron
Issue date:	06/22/1988
From:	Olshan L Office of Nuclear Reactor Regulation
To:	Bliss H COMMONWEALTH EDISON CO.
References
TAC-67448, TAC-67449, TAC-67450, TAC-67451, NUDOCS 8807120376
Download: ML20150C253 (6)

Text

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June-22, 1988 DISTRIBUTION:

Secket.F11ecp OGC RockVil1e Docket Nos. STN 50-454. STN 50-455, NRC 8 Local PDRs EJordan STN 50-456 and STN 50-457 PDIII-2 r/f

• JPartlow GHolahan SSands LLuther PDIII-2 Plant Mr. Henry Bliss LOLshan Nuclear Licensing Manager DMuller Ct:mconwecith Edison Company Fost Office Box 767 Chicago, Illinois 60690

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT TENDON DESIGN STRESSES-BYRON /BRAIDWOOD (TAC NOS. 67448, 67449, 67450AND67451)

)

By letter dated March 2,1988, you requested an amendment to the Technical Specifications for Byron /Braidwood that would reduce the containment tendon design stresses.

Enclosed is a request for additional information.

Please respond within 60 days of receipt of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Leonard 01shan, Project Manager Project Directorate III-2 Division of Reactor Projects - III IV, V and Special Projects

Enclosure:

As stated cc: See next page 0FC : 0111-2

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June 22, 1988 Docket Nos. STN 50-454, STN 50-455, STN 50-456 and STN 50-457 Mr. Henry Bliss Nuclear Licensing Manager Comonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

SUBJECT:

REQUEST FOR ADDITIONAL INFORMATION - CONTAINMENT TENDON DESIGNSTRESSES-BYRON /BRAIDWOOD(TACNOS. 67448, 67449, 67450 AND 67451)

By letter dated March 2, 1988, you requested an amendment to the Technical Specifications for.eByron/Braidwood that would reduce the containment tendon design stresses. Enclosed is a request for additional information.

Please respond within 60 days of receipt of this letter.

The reporting and/or recordkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Leonard Olshan, Project Manager l

Project Directorate III-2 5

Division of Reactor Projects - III IV, Y and Special Projects i

j

Enclosure:

As stated cc: See next page I

4 June 22, 1988 i

Enclosure f

l Request for Additional Information I

1.

Provide background information, including basic assumptions, calculation and test results, for the determination of the original minimum design value of lift off stresses in tendons and show how the design tendon stresses (i.e.,143 ksi for dome,144 ksi for vertical and 140 ksi for hoop) were detemined in the technical specification.

2.

Provide analysis, calculation and test results to show how the proposed t

design tendon stresses (133 ksi for dome,127 ksi for vertical and 133 ksi for hoop) are obtained.

3.

Describe how the reduction of design stresses will affect the margin of safety, and provide justification for such reduction by assuring that the structural integrity of the containment will not be impaired in any way.

l I

June 22, 1988 i

Enclosure Request for Additional Information 1.

Provide background information, including basic assumptions, calculation and test results, for the determination of the original minimum design value of lift-off stresses in tendons and show how the design tendon stresses (i.e. 143 ksi for dome, 144 ksi for vertical and 140 ksi for hoop) were determined in the technical specification.

2.

Provide ant. lysis, calculation and test results to show how the proposed design tendon stresses (133 ksi for dome,127 ksi for vertical and 133 ksi for hoop) are obtained. -

3.

Describe how the reduction of design stresses will affect the margin of safety, and provide justification for such reduction by assuring that the structural integrity of the containment will not be impaired in any way.

I

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Mr. Henry Bliss Commonwealth Edison Company Byron /Braidwood cc:

l Mr. William Kortier Dr. Bruce von Zellen Atomic Power Distribution Department of Biological Sciences Westinghouse Electric Corporation Northern Illinois University Post Office Box 355 DeKalb, Illinois 61107 Pittsburgh, Pennsylvania 15230 Joseph Gallo Esq.

U. S. Nuclear Regulatory Comission Hopkins and Sutter Byron / Resident Inspectors Office 1050 Connecticut Ave., N.W.

4448 German Church Road Suite 1250 Byron, Illinois 61010 Washington, D. C. 20036 Ms. Lorraine Creek C. Allen Bock, Esquire Rt. 1, Box 182 Post Office Box 342 Manteno, Illinois 60950 Urbana, Illinois 61801 Mrs. Phillip B. Johnson Regional Administrator 1907 Stratford Lane U, S. NRC, Region III Rockford, Illinois 61107 799 Roosevelt Road Glen Ellyn, Illinois 60137 Douglass Cassel, Esq.

109 N. Dearborn Street Ms. Bridget Little Rorem Suite 1300 Appleseed Coordinator Chicago, Illinois 60602 117 North Linden Street Essex. Illinois 60935 Ms. Pat Morrison 5568 Thunderidge Drive Mr. Edward R. Crass Rockford, Illinois 31107 Nuclear Safeguaros and Licensing Division David C. Thomas, Esq.

I Sargent & Lundy Engineers 77 S. Wacker Drive 55 East Monroe Street Chicago, Illinois 60601 Chicago, Illinois 60603 Elena Z. Kezelis, Esq.

U. S. Nuclear Regulatory Comission Isham, Lincoln & Beale Resident Inspectors Office Three First National Plaza I

RR#1, Box 79 Suite 5200 l

Bracev111e, Illinois 60407 Chicago, Illinois 60602 1

i

l June 22, 1988 DISTRIBUTION:

l Docket File OGC Rockville l

Docket Nos. STN 50-454, STN 50-455, NRC & Local PDRs EJordan STN 50-456 and STN 50-457 PDIII-2 r/f JPartlow GHolahan SSands LLuther PDIII-2 Plant Mr. Henry Bliss LOLshan Nuclear Licensing Manager DMuller Commonwealth Edison Company Post Office Box 767 Chicago, Illinois 60690

SUBJECT:

RE0 VEST FOR ADDITIONAL INFORMATION - CONTAINMENT TENDON DESIGN STRESSES-BYRON /BRAIDWOOD (TAC NOS. 67448, 67449, 67450AND67451)

By letter dated March 2,1988, you requested an amendment to the Technical Specifications for Byron /Braidwood that would reduce the containment tendon design stresses.

Enclosed is a request for additional information.

Please respond within 60 days of receipt of this letter.

The reporting and/or recnrdkeeping requirements contained in this letter affect fewer than ten respondents; therefore, OMB clearance is not required under P.L.96-511.

Sincerely, Leonard Olshan, Project Manager Project Directorate III-2 Division of Reactor Projects - III IV, V and Special Projects

Enclosure:

As stated cc: See next page l

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