ML18142B253

LER 1976-022-00 for R. E. Ginna, Unit 1, Error in Westinghouse Safety Analysis Methods

ML18142B253
Person / Time
Site:	Ginna
Issue date:	08/19/1976
From:	White L Rochester Gas & Electric Corp
To:	O'Reilly J NRC/IE, NRC Region 1
References
LER 1976-022-00
Download: ML18142B253 (6)

Text

Nl]C I oRM 196{2 70)TO: Mr.Jame P.O'.Reilly.

FROM;Rochester Gas&Electric" Co.Roches ter, New York L.D.White, Jr.@LETTER QOAIOINAL 38COP Y DESCRIPTION ONOTOAIZED JRJNCLASSIFIED PAOP INPUT FOAM ENCLOSURE ,U.S.NUCLEAR AEOULATORY Co" SISSION NRC DISTRIBUTION Fon PART EO DOCKET MATERIAL DOCKET NUMBER 50-244 F ILE NUMIIER INCIDIÃZ REPORT DATE OF DOCUMENT 8/19/76 DATL'ECEIVE D 8/23/76 NUMBER OF COPIES RECEIVED One{Iskgned copy Ltz, trans the following:

ACKNOWLEDGED 90 NOT REMOVE Licensee Event Report (RO-50-244/76-22) on 8/5/76 concerning Westinghouse notifying RG&E of a change in the assumptions to-be used by Westinghouse'in the safety analysis methods for the LOCA.(1-P)(1>>P)PLANT NAME Ginna.Ol NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J.COLLINS BRANCH CKlEF: W~CYR FOR ACTION LIC..ASST.:

W CYS ACRS CYS HOLDING S FOR ACTION/INFORMATION 8 23 76 Schwencer Sheppard RJL REG FILE I RE 2 MIPC SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES CASE INTERNAL D IST Rl BUTION~~.rr TEDESCO MACCARY EISENHUT 4 XAj SERO VOLL'MER EJNCH KREGER J.COLLINS'r LPDR!lyons, N.Y.LPDR: Rochester N.Y~TIC: EXTERNAL DISTRIBUTION CONTROL NUMBER---NAC FORM 195{2-73)

P II~~*P I~PfP I~~P PP~P~

I'ch Qc+t t ROCHESI'ER GAS AND ELECTRiC CORPORhTIOH o 89 EAST A'lEHUE, ROCHESTER, H.Y.i I649 1CCE II>IC LKOII D.WHITE.JR, VICS PtcCSIDKNT II 1 f Pi Ct'At 1 c August 19, 1976 Mr.James P.O'Reilly, Director U.S.Nuclear Re ulato Commi g ssion 9 Office'of Inspection and Enforcement Region I p~,.631 Park Avenue King of Prussia, Pennsylvania 19406

Subject:

Reportable Occurrence 76-22 (14-day report), Error in Westinghouse safety analysis methods as applied to Ginna Station R.E.Ginna Nuclear Power Plant, Unit No.1 Docket No.50-244

Dear Mr.O.'Reilly:

ln accordance, with Technical Specifications, Article 6.9.2a, the attached report of Reportable Occurrence 76-22, 14-day, is he'reby submitted.

Two additional copies of this letter and the attachment are enclosed.Very truly yours, V L.D.White, Jr.Attachment J cc: Dr.Ernst Volgenau (40)Mr.William G.McDonald (3)grab acct'IO c.11 gIc+a(oo t 0'II,o 0 A J~COiVXROL LER 76-22/1T LICENSEE EVENT REPORTS BLOCK: t'PLEAGE PAINT ALL AECIU!AEO INFORMATION) 1 6'LICENSEE NAME ggNY86G l 14 15 7 89 LICENSE NUMBEA 0 0-0 0 0 0 0-0 LICENSE TYPE 0'l.1 1 1 25 26 30 EVENT'TYPE 31 32 REPOAT REPORT CATEGORY TYPE SOURCE DOCKET NUMBER EVENT DATE AEPOAT DATE[OD1]ooN'T

~T~L.0 6 0-0 2 4 4 0 8 0 8 7 6 0 8 1 9 7 6 7 8 57 58 5960 61 68 69 74 75 80 EVENT DESCRIPTION Qpg Westinghouse notified RG&E of a change in the assumptions to be used by Westinghous 7 8 9 80 I in the safety analysis methods for the LOCA.(Reportable Occurrence 50-244/76-22, 7 89 t00j4 14-day).7 8 9[os 7 8 9 t00I 7 89 SYSTEM CAUSE CODE CODE[oO7I~am 8 8 7 8 9 10 11 12 CAUSE DESCRIPTION Q~g~The ori inal anal COMPONENT CODE 17 PRME COMPONENT SUPPUEA 43 44 COMPONENT MANU FACTllREA W12 0 47 N 48 sis assumed that u er head re ion fluid tern erature was at T-cold.80 80 80 7 8 9 80~09 LIt has been shown that for Westinghouse PWR's the actual upper head fluid temperature 7 8 9 80~10 was somewhat greater.Westinghouse has reanalyzed (cont'd.under Additional Factors)OTHER STATUS NA AMOUNT OF ACTIVITY OFFSITE CONSEQUENCES

[Qs 7 89 FACIUTY STATUS%POWER Q~g~G~oo o 7 8 9 10 12 13 FOAM OF 7 8 9 10 11 PERSONNEL EXPOSURES 7 8 S 11 12 13 PERSONNEL INJURIES NUMBFR DESCRIPTION I1141~oo 0 NA 7 8 9 11 12 METHOD OF OISCOVEAY 44 45 46 44 45 NA LOCATION OF AELEASE 80 80 80 OISCOVEAY DESCRIPTION ii i~h 80 7 89 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION.

Q~g H 7 89 10 PUBLICITY NA NA 80 80 7 89 ADDITIDNAL FAOTDRs(cont'd.

from Cause Description) the LOCA with T-cold equal to T-hot~18 on a eneric basis, and found that the eak claddin tern erature increases b 40 F.80 7 89 BD Westinghouse has advised us that other accident calculations for Ginna are not affected.~~19 No further corrective action is necessary.

7 89 NAME: R.Eliasz 80 PHovE 7 1 6/546-2700, eat.2748 GPO 88t 68T a~l"%, l