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

N+C FORM 3GG U. S. NUCLEAR REGULATORY COMMISSION "I( 77)

LlCENSEE EVENT REPORT CONTROL BLOCK: Ql (PLEASE PRINT OR TYPE ALI. REQUIRED INFORMATION) 1 6

~0 7 8 9 N Y N M LICENSEE CODE P 1 14 2'

15 0 0 0 0 0 LICENSE NUMBER 0 0 0 25 Q 3 26 4 1

'I LICENSE TYPE I 1 30 Os~Os 57 CAT 58 CON'T

~01 "'""'~LQG 0 5 0 0 0 2 2 0 Q70 3 0 6 9 QB. 0 3 2 0 7 9 QB 7 8 60 61 DOCKET NUMBER 68 69 EVENT DATE 74 75 REPORT DATE 80 EVENT DESCRIPTION AND PROBABLE CONSEQUENCES Q10 Durin the refuel outage, inservice inspection of an Emergency Condenser

~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 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 7 8 9 10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT REVISION Q>>

LERIRQ sssos<

EVENT YEAR

~79 22 ~ ~00 REPORT NO.

2 ~M ~01 CODE TYPE

~T ~0 NO.

ACTION . FUTURE TAKEN ACTION 33 Ols ~iO@

34 21 EFFECT ON PLANT

~~Oso 35 CAUSE DESCRIPTION AND CORRECTIVE ACTIONS Q27 23 SHUTDOWN METHOD

&20>>

36 24 37 0

26 0 0>>

HOURS +22 27 40 41 28 ATTACHMENT SUBMITTED Q>>

29

'PRD.4 FORM SUB.

~>@4 42 30 PRIME COMP.

SUPPLIER

~iQ>>

43 31 44 32 COMPONENT MANUFACTURER 47 Inter Granular stress corrosion cracking is the probable cause. The elbo'w and safe end will be replaced during this outage.

3

~l4

,7 8 9 80 FACILITY METHOD OF STATUS  % POWER OTHER STATUS DISCOVERY DISCOVERY DESCRIPTION Q32

[its] ~HOss ~00 7 8 9 10 0.

12 Oos 13 NA 44

~BQ31 45 46 80 ACTIVITY CONTENT

~is RELEASED OF RELEASE LZJQso 2 Q AMOUNT OF ACTIVITY Q NA LOCATION OF RELEASE Q 7 8 9 10 44 45 80 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q3B 7

7 8,9

~00 0

\I Qsv 12 2 Qos 13 NA 80 PERSONNEL INJURIES NUMBER OESCRIPTIONQ41 s ~00 0 Oso NA 7 8 9

TYPE 11 DESCRIPTION 12 Q43 80 0 Z Q42 NA 8 9 10 80 ISSUED PUBLICITY DESCRIPTION QG 7903 Ssoa~~ NRC USE ONLY 0 ~NQ44 NA O I

7 8 9 10 68 69 80 o 0

NAME OF PREPARER PHONE:

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,.

Bo& Che eLbol and sate-end ivLLL be /IepLaeed dutu.ng ~

The p/IobabLe came ~ Inte/L-gruznuLa/L $ &ua Co/L/Lotion C/sacking.

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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