ML18037A166

LER 79-002/01X-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

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: ML17053A641 ML18037A166
References
LER-79-002-01X, LER-79-2-1X, NMP-1112, NUDOCS 7904270382
Download: ML18037A166 (2)

Text

NRCIEORM 366 U. S. NUCLEAR REGULATORY COMIEIISSION (7.7~7' LICENSEE EVE IMT REPORT CONTROL BLOCK:

1.Q (PLEASE PRINT OR TYPE ALL REQUIRED INFORMATION)

Q4~

1

~O 7 8 9 N Y N I.ICENSEE CODE I(I P I 14 Qsolol-15 o o LICENSE o o ERIUEAIBER o - o oQEA>>

25 "6 1

LICENSE TYPE 30 57 CAT 58 CON'T

~01 RE

~LQ Q 5 Q Q Q 2 2 68 Q7 69 Q ) 3 I Q 6 EVEEVT DATE 9

74 QB Q 75 4 2 13 REPORT DATE 7 g 80 Q

7 8 60 61 DOCKET NUMBER 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

~o 4 the inconel weld was corn letel removed from the nozzle. This was

~o 6 detemerined by a modified eddy current technique and verified by etching.

~o 6 This weld removal has minimal safet im lication since the weld and

~o 7 inconel is being- replaced.

~OB 80 7 8 9 SYSTEI41 CAUSE CAUSC COI"IP. VALVE CODE CODE SUBCODE Coh1PONEiNT CODE SUBCODE SUBCODE

[OO~] ~CA Q>> ~A[QE2 ~EQis P IE IN IE T R 18 Q4 ~FQEE 19

~K 20 Qs 7 8 9 10 11 12 13 SEQUENTIAL OCCURRENCE REPORT R EV IS I ON Q17 LF R(RO Riios EVENT YEAR

~71 21 9

22

~

23 SHUTDOWN

~00 24 REPORT NO.

0 26

~m 27

~OI 28 ATTACHMENT CODE 1

29 NPRDK TYPE

~II 30

~

31 PRIME COMP.

~l NO.

32 COEhIPONEP'JT ACTION .FUTURE CFFECT TAKEN ACTION ON PLANT METHOD HOURS Q22 SUBMITTED FORM SUB. SUPPLIER MANUFACTURER

~CQ20 ~ZQ>> 0 0 Ol 0 Y Q22 ~NQ24 ~NQ28 C EI I 9 0 Q18 ~ZQ18 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 4

7 8 9 80 FACILITY STATUS " ~ '0 POV(ER OTHER STATUS Q METHOD OF DISCOVERY DISCOVERY DESCRIPTION Q32

~is N Q28 ~OI 0 0 Q28 NA 44

~CQ31 45 80 7 8 9 10 12 13 ACTIVITY CONTENT RELEASED OF RELEASF AMOUNT OF ACTIVITYQS LOCATION OF RELEASE Q 6 ~ZI Q33 ~ZQ34 NA NA 80 7 8 9 10 11 44 45 PERSONNEL EXPOSURES NUMBER TYPE DESCRIPTION Q39 7 ~00 0 Qsi ~ZQ28 NA 80 7 8 9 11 12 13 PERSOiVNEL INJURIES 7 8 9 11 12 80 LOSS OF OR DAMAGE TO FACILITY TYPE DESCRIPTION Q43

~ZQ42 NA 8 9 10 80 PUBLICITY ISSUED DESCRIPTION Q ~9043vo s8M NRC USE ONLY 44 KK ~N04

(. 8 9 10 NA 69 BO 48 8

o-NAME PF PREPARER R. sutras ~ PHONE'8 A-0 E 1327 =

NIAGARA MOHAWK POWER CORPORATION/300 ERIE BOULEVARD WEST, SYRACUSE N.Y. 13202/TELEPHONE (315) 474- >511 Ap~ 23, 1979

](/L. Houce, H.

Nr'cc-on, Uni ed S~eh Regula o/Ly Coml!LLhhion Regin. I 6 "1 P Avenu.e.

Kc.'( PnLIhh~, PA. 19406 E- Boche No. 50-220 T-Sea/L,%,. G/u.en.:

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

h~ed ~ al emetcgenc!J

.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 mlpl L~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. appI Lcable he~onh ->~o, The, fo&owc.na Gen~M Ele ',

IX, and YI. The..te "au o( 4!.c no ceduteh!

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

a.) 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 ~>

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

'Lh p o chh machining, and h.d'ehh /LeLLcvk 1a pnocedu/Lch u!i'll be. uhcd m cI .

.d te/M,al

'L;c~n u'etc'Lug, 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 4 ~ ~

WC.

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