ML20098B732

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Submits Addl Info for Auxiliary Sys Branch Re SER Open Issue 2, Tornado Missile Effects on Uhs. Cooling Tower Failure Speeds Determined by Assuming Steady Winds Over Entire Tower
ML20098B732
Person / Time
Site: Limerick  Constellation icon.png
Issue date: 09/24/1984
From: Kemper J
PECO ENERGY CO., (FORMERLY PHILADELPHIA ELECTRIC
To: Schwencer A
Office of Nuclear Reactor Regulation
References
CON-#484-092, CON-#484-92 OL, NUDOCS 8409260243
Download: ML20098B732 (2)


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PHILADELPHIA ELECTRIC COMPANY 23O1 M ARKET STREET P.O. BOX 8699 PHILADELPHI A. PA.19101 (215)841-4502 V IC E-P R E SI D E N T ENGINEEReNG Aiep RESE ARCM SEP 2189A Mr. A. Schwencer, Chief Licensing Branch No. 2 Division of Licensing U.S. Nuclear Regulatory Cmmission Washington, D.C.

20555

SUBJECT:

Limerick Generating Station, Units 1 & 2 Additional Information for Auxiliary Systems Branch Regarding SER Open Issue #2 (Tornado Missile Effects on Ultimate Heat Sink)

REFERENCE:

1)

Letter J. S. Kemper to A. Schwencer, dated 9/4/84 with Attachment dated August, 1984 2)

Letter J. S. Kemper to A. Schwencer, dated 9/11/84 with Attachment dated September, 1984 3)

Telecon 9/21/84, R. Martin to J. T. Robb

Dear Mr. Schwencer:

This letter confirms the infomation clarifying the reference 1

.and 2 responses provided in the reference 3 telecon.

The cooling tower failure speeds were determined by evaluation of the tower assuming steady winds over the entire tower.

The Weibull distribution parameters in the refe ence 2 response were estimated by fitting the 78 rph and 102 nph2P9.cs frq NUS-4507. 'Ihese corresond to frequency of 1x10 and 5x10 respectively.

Very truly yours, 8409260243 840924 PDR ADOCK 05000352 jd E

PDR e

ARD/dg/09218402

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See Attached Service List

f cc: Judge Lawrence Brenner Judge Peter A. Morris l"

. Judge Richard F. Cole Judge Christine N. Kohl Judge Gary J. Edles Judge Reginald L. Gotchy Troy B. Conner, Jr., Esq.

I Ann P. Hodgdon, Esq.

Mr. Frank R. Rcxnano Mr. Robert L. Anthony Ms. Maureen Mulligan Charles W. Elliot, Esq.

Zori G. Ferkin, Esq.

Mr. 'Ihcznas Gerusky Director, Penna. Dnergency Managerent Agency Angus R. Iove, Esq.

-David Wersan,.Esq.

Robert J. Sugannan, Esq.

Martha W. Bush, Esq.

Spence W. Perry, Esq.

Jay M. Gutierrez, Esq.

Atcznic Safety & Licensing Appeal-Board Atcznic Safety & Licensing Board Panel Docket & Service Section Mr. James Wiggins Mr. Timothy R. S. Capbell

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