ML20050B491

Responds to NRC 810924 Ltr Re Mark II Containment Program. Analyses Performed to Design Basis Loads Considered Conservative & Therefore Not Necessary to Perform Analysis to NUREG-0808 Loads

ML20050B491
Person / Time
Site:	Zimmer
Issue date:	03/29/1982
From:	Borgmann E, Borgmann E CINCINNATI GAS & ELECTRIC CO.
To:	Harold Denton Office of Nuclear Reactor Regulation
References
RTR-NUREG-0528, RTR-NUREG-0808, RTR-NUREG-528, RTR-NUREG-808 NUDOCS 8204050388
Download: ML20050B491 (2)

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THE CINCINNATI GAS & ELECTP.IC- d- ANY WL

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9 Docket No. 50-358 %Qtp [p/

rec s March 29, 1982 s/

Mr. !!arold Denton, Director N Office of Nuclear Reactor Regulation U.S. Nuclear Regulatory Commission Washington, D.C. 20555 RE: WM. II . ZIMIiER NUCLEAR POWER STATION -

UNIT 1 - MARK II CONTAINMENT PROGRAM

Dear Mr. Denton:

This is in response to the NRC letter dated September 24, 1981 from Mr. Darrell G. Eisenhut to Mr. Earl A. Borgmann. Pages 6-4 and 6-14 of Supplement No. 1 of the Zimmer SER (NUREG-0528) state that the design basis empirical loads are an acceptable design basic. The design basis empirical loads were developed conservatively to ensure a high margin of safety which would accommodate any future changes in pool dynamic loads that might occur as a result of the Staff's continued review of the new 4TCO data. The analyses performed to the design basis loads for the Zimmer Plant are conservative and, therefore, it is not necessary to perform an analysis to the NUREG-0808 loads.

The NRC memorandum to W. Butler from F. Eltawila dated January 20, 1982 states that the Zimmer load specifications are more conservative than the lead plant specifications. This memorandum also states that the lead plant specifications for chugging are conservative and acceptable. This also indicates that further analysis for the Zimmer Plant is not required.

An analysis has already been performed to compare the Zimmer empirical loads to the lead plant (4TCO) condensation oscillation and ch.igging loads as referenced in the Zimmer DAR, Appendix I, " Lead Plant CO and Chugging Definition Report".

From these comparisons, it is obvious that the Zimmer empirical loads do provide a conservative design basis which will ,

accommodate all postulated Mark II steam condensation loads. l K O hh0kB PDR gQ\

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To: Mr. Harold Denton, Director March 29, 1982 II(;

Nl Re: Wm. H. Zimmer Nuclear Power Station - Page 12 14 Unit 1 - Mark II Containment Program ']O Based on all of the above information, it is the applicant's position that the Zimmer Plant does not need to perform any further confirmatory analysis for the NUREG-0808 .

loads.

Very truly yours, THE CINCINNATI GAS & ELECTRIC COMPANY

-r n E. A. BORGMANN EAB: dew cc: John H. Frye III M. Stanley Livingston Frank F. Hooper Troy B. Conner, Jr.

James P. Fenstermaker Steven G. Smith William J. Moran J. Robert Newlin Samuel H. Porter B. Ralph Sylvia James D. Flynn ,

W. F. Christianson l James H. Feldman, Jr.

John D. Woliver Debora.. F. Webb David K. Martin Geor$- E. Pattison Andrew B. Dennison State of Ohio )

County of Hamilton)ss  ;

Sworn to and subscribed before me this  ? day of March, 1982.

(d. . . - )!' d. c wek.

Notary Public ALICE M. LEURCK Notary Pubhe, State of ONo

)lp Conmission ispires Decemtte 16 Iffi