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 ,U.S. NUCLEAR AEOULATORY Co " SISSION DOCKET NUMBER

{2 70) 50-244 F ILE NUMIIER NRC DISTRIBUTION Fon PART EO DOCKET MATERIAL INCIDIÃZ REPORT TO: FROM; DATE OF DOCUMENT Rochester Gas & Electric" Co. 8/19/76 Mr. Jame P. O'.Reilly. Roches ter, New York DATL'ECEIVED L. D. White, Jr. 8/23/76

@LETTER ONOTOAIZED PAOP INPUT FOAM NUMBER OF COPIES RECEIVED QOAIOINAL JRJNCLASSIFIED 38COP Y One{Iskgned copy DESCRIPTION ENCLOSURE Ltz, trans the following: Licensee Event Report (RO 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 ACKNOWLEDGED methods for the LOCA.

90 NOT REMOVE (1-P) (1>>P)

PLANT NAME NOTE: IF PERSONNEL EXPOSURE IS INVOLVED SEND DIRECTLY TO KREGER/J .COLLINS Ginna. Ol FOR ACTION/INFORMATION 8 23 76 RJL BRANCH CKlEF: Schwencer W ~ CYR FOR ACTION LIC..ASST.: Sheppard W CYS ACRS CYS HOLDING S INTERNAL D IST Rl BUTION REG FILE I RE 2 MIPC SCHROEDER IPPOLITO HOUSTON NOVAK CHECK GRIMES ~

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CASE 4 XAj TEDESCO MACCARY EISENHUT SERO VOLL'MER EJNCH ' r KREGER J. COLLINS LPDR! lyons, N.Y.

LPDR: Rochester N.Y ~

EXTERNAL DISTRIBUTION CONTROL NUMBER --

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NAC FORM 195 {2-73)

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II>IC ROCHESI'ER GAS AND ELECTRiC CORPORhTIOH o 89 EAST A'lEHUE, ROCHESTER, H.Y. i I649 LKOII D. WHITE. JR, II f Pi Ct' 1

VICS PtcCSIDKNT At 1 c August 19, 1976 Mr. James P. O'Reilly, Director U. S. Nuclear Re g ulato Commi 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) acct'IO t 0 ' grab c.11 gIc+ a(oo II,o

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LER 76-22/1T LICENSEE EVENT REPORTS COiVXROL BLOCK: t'PLEAGE PAINT ALL AECIU!AEO INFORMATION) 1 6

'LICENSEE LICENSE EVENT NAME ggNY86G LICENSE NUMBEA l 0 0 0 0 0 0 0 0 0' l.

TYPE 1 1 1

'TYPE

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7 89 14 15 25 26 30 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 59 60 61 68 69 74 75 80 I

EVENT DESCRIPTION Qpg Westinghouse notified RG&E of a change in the assumptions to be used by Westinghous 7 8 9 in the safety analysis methods for the LOCA. (Reportable Occurrence 50-244/76-22, 80 7 89 80 t00j4 14-day) .

7 8 9 80

[os 7 8 9 t00I 7 89 PRME 80 SYSTEM CAUSE COMPONENT COMPONENT CODE CODE COMPONENT CODE SUPPUEA MANUFACTllREA 7

[oO7I ~am 8 9 10 8

12 8

17 43 44 W12 0 N 11 47 48 CAUSE DESCRIPTION Q~g ~The ori inal anal sis assumed that u er head re ion fluid tern erature was at T-cold.

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) 7 89

~h FACIUTY METHOD OF 80 STATUS  % POWER OTHER STATUS OISCOVEAY OISCOVEAY DESCRIPTION Q~g 7 8 9

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12 13 NA 44 45 46 ii i FOAM OF 80 AMOUNT OF ACTIVITY LOCATION OF AELEASE NA 7 8 9 10 11 44 45 80 PERSONNEL EXPOSURES 7 8 S 11 12 13 PERSONNEL INJURIES NUMBFR DESCRIPTION I1141 ~oo 0 NA 7 8 9 11 12 80 OFFSITE CONSEQUENCES

[Qs 7 89 80 LOSS OR DAMAGE TO FACILITY TYPE DESCRIPTION.

Q~g H NA 7 89 10 80 PUBLICITY NA 7 89 80 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.

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 80 NAME: R. Eliasz PHovE 7 1 6/546-2700, eat. 2748 GPO 88t 68T

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