05000220/LER-1979-002-01, /01X-1 on 790306:during Refueling Outage While Preparing Emergency Condenser Steam Nozzle 5-NB for Replacement of safe-end,discovered Inconel Weld Was Removed from Nozzle.New Safe End Installed

/01X-1 on 790306:during Refueling Outage While Preparing Emergency Condenser Steam Nozzle 5-NB for Replacement of safe-end,discovered Inconel Weld Was Removed from Nozzle.New Safe End Installed

ML18037A166
Person / Time
Site:	Nine Mile Point
Issue date:	04/23/1979
From:	Jutras R NIAGARA MOHAWK POWER CORP.
To:	NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17053A642	List: 05000220/LER-1979-002, Forwards LER 79-002/01X-1 05000220/LER-1979-002-01, /01X-1 on 790306:during Refueling Outage While Preparing Emergency Condenser Steam Nozzle 5-NB for Replacement of safe-end,discovered Inconel Weld Was Removed from Nozzle.New Safe End Installed ML17053A641 ML18037A166
References
LER-79-002-01X, LER-79-2-1X, NMP-1112, NUDOCS 7904270382
Download: ML18037A166 (2)

LER-1979-002, /01X-1 on 790306:during Refueling Outage While Preparing Emergency Condenser Steam Nozzle 5-NB for Replacement of safe-end,discovered Inconel Weld Was Removed from Nozzle.New Safe End Installed

Event date:
Report date:
2201979002R01 - NRC Website

text

U. S. NUCLEAR REGULATORY COMIEIISSION IMT REPORT (PLEASE PRINT OR TYPE ALLREQUIRED INFORMATION)

NRCIEORM 366 (7.7~7' LICENSEE EVE 1.Q I Qsolol-o o

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14 15 LICENSE ERIUEAIBER 25 "6

LICENSE TYPE 30 57 CAT 58 CONTROL BLOCK:

1 N

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8 CON'T

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I.ICENSEE CODE 7

8 RE

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g Q 60 61 DOCKET NUMBER 68 69 EVEEVT DATE 74 75 REPORT DATE 80 EVENT OFSCRIPTIQN AND PRQBABLE CONSEQUENCES Q10 During the refuel outa e, while re arina the emer enc condenser steam

~o3 nozzle 5-NB 'for the replacement of the safe end, it was determined that

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the inconel weld was corn letel removed from the nozzle.

This was

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detemerined by a modified eddy current technique and verified by etching.

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This weld removal has minimal safet im lication since the weld and

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inconel is being-replaced.

~OB 7

8 9

SYSTEI41

CAUSE

CAUSC COI"IP.

VALVE 80 [OO~]

7 8

CODE CODE SUBCODE Coh1PONEiNT CODE SUBCODE SUBCODE

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10 11 12 13 18 19 20 SEQUENTIAL OCCURRENCE REPORT R EV IS I ON LF R(RO EVENT YEAR REPORT NO.

CODE TYPE NO.

Q17 Riios

~71 9

~

~00 0

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~II

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~l 21 22 23 24 26 27 28 29 30 31 32 ACTION.FUTURE CFFECT SHUTDOWN ATTACHMENT NPRDK PRIME COMP.

COEhIPONEP'JT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB.

SUPPLIER MANUFACTURER Q18 ~ZQ18

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33 34 35 36 37 40 41 42 43 44 47 CAUSE OESCRIPTION ANO CORRECTIVE ACTIONS 27 New nickel-chrome-iron weld butter/buildup will be applied,

machined, and stress relieved to the installation specification.

The the new safe end and elbow will be installed according to applicable codes.

3 METHOD OF DISCOVERY

~CQ31 45 NA 45

~9043vo s8M NAME PF PREPARER R. sutras

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FACILITY STATUS

~

'0 POV(ER OTHER STATUS Q

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Q28

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0 Q28 NA 7

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10 12 13 44 ACTIVITY CONTENT RELEASED OF RELEASF AMOUNTOF ACTIVITYQS 6

~ZI Q33

~ZQ34 NA 7

8 9

10 11 44 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 ~00 0

Qsi ~ZQ28 NA 7

8 9

11 12 13 PERSOiVNEL INJURIES 7

8 9

11 12 LOSS OF OR DAMAGETO FACILITYQ43 TYPE

DESCRIPTION

~ZQ42 NA 8

9 10 PUBLICITY ISSUED DESCRIPTIONQ KK ~N04 NA

(.

8 9

10 80 LOCATIONOF RELEASE Q 80 80 80 80 80 NRC USE ONLY 44 48 8

PHONE'8 69 A-0 E

BO o-1327 =

DISCOVERY DESCRIPTION Q32

NIAGARAMOHAWKPOWER CORPORATION/300 ERIE BOULEVARDWEST, SYRACUSE N.Y. 13202/TELEPHONE (315) 474- >511 Ap~ 23, 1979

](/L. Houce, H.

Nr'cc-on, Uni ed S~eh Regin. I 6 "1 P

Avenu.e.

Kc.'( PnLIhh~,

PA.

E-Boche No. 50-220 T-Regula o/Ly Coml!LLhhion 19406 Sea/L,%,.

G/u.en.:

In, ~hc /Lc)cnenced Liccnhcc event Repo.t, wc h~ed ~ al emetcgenc!J condcl1hI>>L elba!u and ha(e-end u;o 1

.tep acca ecauhe OJ ncpo/Luabfc KEnr~o]M nh (GLU!d dLL>LLng out iILhctvzcc. L'Lhp!>c~L on.

Su/Ling ghc n. >me of Che hage.-cnd,

.Lt wah cKecove,tcd.th!Lt ~bc incoI;eZ weld o y

{bMtct) ha inadve/L> QI'Lcc.ff been J QJI;oved anom.<he QIIIQ/Lgcncy c

nhe/L h,teaIII noz le. <858.

Tl~ wa,s de,te,oned by mo!u'.$4.ed eddy cu/Ltent Ceduu'aue and lad etc vc/u.pea by McILLng.

TED !veld ove/Lay

{but"Q/L) neplacement hah IILLILUnak haIIQ y mlplL~w!lh hw!ce.thc ~conel pnoccdute!L>Mch wah huccehhjaMy demonh~tated at a.

Gne,L The, /Lcpa.L/L wot(L ih being accol".paishcd zo.the 1977 ASL'.(E Code, and 2; h 1978 Swmne/L Adaenda.

The, appI Lcable he~onh.,

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The..te "au o( 4!.c no -'

mcXL be. pe/L(onmcd.to Che.

fo&owc.na Gen~M Ele ',

ceduteh!

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1g Reo!LL/Lemcl&s go/L FxeZd ItodLpcaiion o) (/ehh&

ComponcIKh "21A20'2 6)

Pohcy-!Geld Heat I/Lc~lclm RcaLLinemc~

~o/L S~eam OLLtfet Eme/Lgecny Condenhe/L Safe.

Cnd NEOO ~23980 In a

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.the appkLcablc AS((E Codch, a. (ul hcale. mo'c..up..

'L;c~n u'etc'Lug, machining, and h.d'ehh

/LeLLcvk1a pnocedu/Lch u!i'll be. uhcd m cI.

atc Xhc pe/L)onmancc o) iIlc pQJLhoI!net couipll!QHt and pnocehhch.

AlL, IIIGJL!

w1~~dLI!g.thc moc!>up won'h beina fond Skcalll BGMQIL II

~ ~ Lc aLtho/LL. cd 4ILhpcctot-(/e/Ly 4tu="y younh, Originai 'Signed by R. R. Schneidez el La',

(/ice P.tchi dcl Elec,tnic PnoductLon WC.

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