ML18037A164

LER 79-002/01T-0 on 790306:during Inservice Insp of Emergency Condenser Steam Supply Line,Six Reportable Indications Found.Caused by Intergranular Stress Corrosion Cracking.Elbow & safe-end Will Be Replaced

ML18037A164
Person / Time
Site:	Nine Mile Point
Issue date:	03/20/1979
From:	NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053A527	List: ML17053A526 ML18037A164
References
LER-79-002-01T, LER-79-2-1T, NUDOCS 7903260272
Download: ML18037A164 (4)

Text

U.S.NUCLEAR REGULATORY COMMISSION N+C FORM 3GG"I(77)~0 7 8 CON'T~01 7 8 LlCENSEE EVENT REPORT Ql (PLEASE PRINT OR TYPE ALI.REQUIRED INFORMATION) 6 1 2'0 0 0 0 0 0-0 0 3 4 1'I I 1 Os~Os CONTROL BLOCK: 1 N Y N M P 9 LICENSEE CODE 25 26 LICENSE TYPE 30 57 CAT 58 Q 14 15 LICENSE NUMBER"'""'~LQG 0 5 0 0 0 2 2 0 Q70 3 0 6 60 61 DOCKET NUMBER 68 69 EVENT DATE EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 Durin the refuel outage, inservice inspection of an Emergency Condenser 9 QB.0 3 2 0 7 9 QB 74 75 REPORT DATE 80~03 Steam Supply Line, six reportable indications were found..They are on the~1b" id i t t ff d*, 1t f-1d 5 They were found using ultrasonic testing.This has minimal safety~0 G implications.

~OB 7 8 9 80 7 8 SYSTEM CAUSE CAUSE COMP.VALVE CODE CODE SUBCODE COMPONENT CODE SUBCODE SUBCQDC~CJ Q>>X Qlo~2 Qls P I P E X X Ol4~0Ols~2 Ols 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION LERIRQ EVENT YEAR REPORT NO.CODE TYPE NO.Q>>sssos<~79~~00 2~M~01~T-~0 21 22 23 24 26 27 28 29 30 31 32 ACTION.FUTURE EFFECT SHUTDOWN ATTACHMENT

'PRD.4 PRIME COMP.COMPONENT TAKEN ACTION ON PLANT METHOD HOURS+22 SUBMITTED FORM SUB.SUPPLIER MANUFACTURER Ols~iO@~~Oso&20>>0 0 0>>Q>>~>@4~iQ>>33 34 35 36 37 40 41 42 43 44 47 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 Inter Granular stress corrosion cracking is the probable cause.The elbo'w and safe end will be replaced during this outage.3 METHOD OF DISCOVERY~BQ31 45 46 NA 45 7903 Ssoa~~NAME OF PREPARER~l4 ,7 8 9 FACILITY STATUS%POWER OTHER STATUS[its]~HOss~00 0.Oos NA 7 8 9 10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASE AMOUNT OF ACTIVITY Q~is LZJQso 2 Q7 8 9 10 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3B 7~00 0 Qsv 2 Qos NA 7 8,9\I 12 13 PERSONNEL IN JURIES NUMBER OESCRIPTIONQ41 s~00 0 Oso NA 7 8 9 11 12""""'"'"""""'""""" Q43 TYPE DESCRIPTION 0 Z Q42 NA 8 9 10 PUBLICITY ISSUED DESCRIPTION QG 0~NQ44 NA 7 8 9 10 80 LOCATION OF RELEASE Q 80 80 80 80 PHONE: 68 69 80 NRC USE ONLY O I 80 o 0 DISCOVERY DESCRIPTION Q32 Ci'I f>

NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE, N.Y.13202/TELEPHONE (315)474-1511 h(a/cch 20, 1979 hh,.Boyce, H.Gtu.M Oin,ecto/L United S~ee Nu&ea/L ReguLato/Ly Commission Region I 631 Pa/ck Avenue@Ging of P/ursa~, PA.19406 RE: Sock&No.50-220 LER 79-02/T-O Dean, hh..G/Lie/L: As/Lequi/Led by Che htine.h4Le Point>1 Teduu,caL Speci.pcatio>u Sation 4.2.6, Inde/juice Iespeetion pe/L)onuled dldung Nie)LefueL outage, six (6)/Iepo/LtabLe indicatioee ee/Le found wing NIe Late54/I.ecommended EPRI ULt/la5oiu.e Inspection P/Locedu/Lu.

The indicatioes a/Le on She eLboN aide in She heat a))ected zone.of Die eLboIII Co aa(e;end uleLd o)Che IIIuk EmercgeI1cy Conde1+e/L Steam SuppLy Line,.The p/IobabLe came~Inte/L-gruznuLa/L

$&ua Co/L/Lotion C/sacking.

Bo&Che eLbol and sate-end ivLLL be/IepLaeed dutu.ng~outage.Vetug~y yore, Original Signed by R.R.Schneider R.R.Sehneide/L Vice, Ptce5ide1%-

ELec,t/u.e P/Ioduetion

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