ML17228A478

Lists Changes or Errors Identified During Period 930101-1231 for Limiting ECCS Event at Units 1 & 2.Analysis Performed by Siemens & CE

ML17228A478
Person / Time
Site:	Saint Lucie
Issue date:	02/28/1994
From:	Sager D FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-94-52, NUDOCS 9403110268
Download: ML17228A478 (4)

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~ACCELERATED DISTRIBUTION DEMONSTRATION SYSTEM t~

REGULATORY INFORMATION DISTRIBUTION SYSTEM (RIDS)

ACCESSION NBR:9403110268 DOC.DATE: 94/02/28 NOTARIZED: NO DOCKET FACIL:50-335 St. Lucie Plant, Unit 1, Florida Power & Light Co. 05000335 50-389 St. Lucie Plant, Unit 2, Florida Power & Light Co. 05000389 AUTH".NAME AUTHOR AFFILIATION SAGER,D.A. Florida Power & Light Co.

RECIP.NAME RECIPIENT AFFILIATION Document Control Branch (Document Control Desk)

SUBJECT:

Lists changes or errors identified during period 930101-1231 for limiting ECCS event at Units 1 & 2.Analysis D performed by Siemens & CE.

DISTRIBUTION CODE A001D COPIES RECEIVED LTR ENCL SIZE:

TITLE: OR Submittal: General Distribution NOTES: A RECIPIENT COPIES RECIPIENT COPIES ID CODE/NAME LTTR ENCL ID CODE/NAME LTTR ENCL' PD2-2 LA PD2-2 PD NORRIS,J D INTERNAL: ACRS 6 NRR/DE/EELB NRR/DORS/OTS B 1 NRR/DRCH/HICB NRR/DRPW 1 NRR/DSSA/SPLB NRR/DSSA/SRXB 1. NUDOCS-ABSTRACT OC/LFDCB 1 OGC/HDS3

~REGS 01 1 EXTERNAL: NRC PDR NSIC R

D D

D NOTE TO ALL "RIDS" RECIPIENTS:

PLEASE HELP US TO REDUCE WASTE! CONTACT THE DOCUMENT CONTROL DESK, ROOM PI-37 (EXT. 20079) TO ELIMINATEYOUR NAME FROM DISTRIBUTION LISTS FOR DOCUMENTS YOU DON'T NEED!

TOTAL NUMBER OF COPIES REQUIRED: LTTR 22 ENCL

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v P.O. Box 128, Ft. Pierce, FL 34954-0129 I 94-52 February 28, 1994 10 CFR 50.46 U. S. Nuclear Regulatory Commission Attn: Document Control Desk Washington, DC 20555 Re: St. Lucie Units 1 and 2 Docket Nos. 50-335 and 50-389 10 CFR 50.46, "Acceptance Criteria for Emergency Core Cooling Systems in Light Florida Power and Light (FPL) Company has completed the review of information necessary to comply with the 10CFR50.46 annual reporting requirements for St. Lucie Units 1 and 2. The changes or errors listed below were identified during the period of January 1, 1993 to December 31, 1993 for the limiting Emergency Core Cooling System (ECCS) events at either St. Lucie Unit 1 or 2.

The St. Lucie Unit 1 and 2 ECCS analyses are performed by Siemens Power Corporation (SPC) and ABB-Combustion Engineering (ABB/CE). As in the last reporting period, the vendor which holds the Analyses of Record (AOR) is:

St. Lucio Unit 1 Small Break LOCA - ABB/CE Large Break LOCA - SPC St. Lucie Unit 2 Small Break LOCA - ABB/CE Large Break LOCA - ABB/CE The St. Lucie Unit 1 Large Break and Small Break LOCA were re-analyzed during the current report period by Siemens Power Corporation to support operation with 25% steam generator tube plugging. The peak clad temperature decreased by 32'F to 1912'F for the Large Break LOCA. The methodology supporting the Small Break LOCA is new and currently under review by the NRC. The peak clad temperature for the Small Break LOCA is expected to decrease from the current AOR value. An error was found in the method to initialize the temperature distribution in the containment wall of ABB/CE's Large Break LOCA model for St. Lucie Unit 2. The effect on peak clad temperature was less than 1'F.

Should there be any questions, please contact us.

Very truly yours, D. A. Sag Vice Pres de t St. Lucie P ant DAS/CDW/kw cc: Stewart D. Ebneter, Regional Administrator, Region II, USNRC Senior Resident Inspector, USNRC, St. Lucie Plant DAS/PS'077-94 9403ii0268 940228 PDR ADOCK 0500033S f7; P PDR an FPL Group company

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