ML17261A813
| ML17261A813 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 03/11/1979 |
| From: | CURTIS A E ROCHESTER GAS & ELECTRIC CORP. |
| To: | WAMBACH T NRC |
| Shared Package | |
| ML17261A806 | List: |
| References | |
| NUDOCS 8901130176 | |
| Download: ML17261A813 (10) | |
Text
~~1 S3-1 ROCHESTER'G'S nNO"'.EC>RlC C~.cPCRpl>
lO><~09=AS>A'>>HUE, RCC.""ES:"="2,>l."..l'5~y'><'a 4~fi C4 K I~<<C'2-Ginna Station.March 11, 1979
Subject:
Girrw Reactor P-essure Vessel"B" L&et Nozzle to Vessel Veld Indicaticn To: Tan V~ach-Nccl~Regulatory Can~sionOn Febv-~z 27 1979 t"..e"8" alee nozz'e oz"""ie Gim Re=-c""" Vessel ewer.ed=w t".e rsozzle bo=e..-'-4 15'cng~~l l'ave 2nd>'-5'hm:.<ve in acco ance wi~.~zoe~ai>'
of.Sec""'on C.Cn'Ywch 3, 1.79 tie&a was w wO eva--te oy*~we perse-.:.eL.
Cne 15 cngie&.-~-.d catim;;~pre'we=y ev->--'s c=-cceotmle
'~-~"ther e.=-.-'-iat='cn
-.d ev ruat"H e~'" an'~s~c cai"cn Ives not cerected i.>:a~5 she<<WaVe e~=-'="-tion Cn y t'"..e 15'ong~Z3.='vaVe CB~~cted 0:~id" C=t Cii.On Y2 ch~>1 7, a~i 2.~Q:""t:.u~l i.~wu t.;e vesse'a L'sL.=0 ong t"n'>ave, 45'nd 60 ang>e be=--she<<'..ave~~~-:-zticn oz~-.e"3" w et nozz'2 was pe: ed.The"2.<ew of~ms c""-did rot reve="l anv.Qicat='cns.
'I/l<<..ere.ore, cn i~'-"".o, i><9 a 2-.~.Cn oz-.e.c""-..-"e'pe=-=;..=m~=.e DoŽ=="or u--"='.=-a 1>ang=2=-., cngi=m"~.-.-2 e~'"-"-'"a"e e.-'----c"-s--" d cz s-'-c-'"-"a="--'='c=-s
~o-whic'.".recŽrdec 0%D~C 2nd~cate~~ii-ce s'=->ls~.o~~(as she:...I in at"ac'".ed
=p~-2 i)icent='==ed ov t'.eir=~@'.a aw'="e i..C r:Žers as 61, 55, 53, 102, 89 and 1;7.The indicaticn was~~e~rea~~~ed-~~~".6~awa>sea>, 2 oz Aiica re"r=ec 507.DAC wd c cate~li="'es in 6 a==-s ide~ti"ied bv~'".~='r n~z-..=.~mlitt"e%L'~C n=.iers as-', 59, 58, 89', 76 and 115.These indic"-t<<cns c=zine into 3 incicat='ons 1.inc;.es mart at the'-ne"-~est poi.ts.This c-..ension is greate<<t'.".~a the 0.93 inch~"o."-a wall diL.e-lions oz the larger incic"-ticn so they are ccnsi 2 ed as separate indications in accordance
~v":"a the m~es oz Section Xi.T.".e 2 siial indicatic.a have"a" and"l" d~we~sicns Rich are clear'y al>lowable ader the ries of Sect" on ZE 197<, Table IBM-3510.7".e larger indication
'res m"a" oz.W5 inches,"l" oz 5.271 inches and"t" is 9~~ches r~~cons der3.~<t.le r~d,eclat-cn data wltDout tzEQzlg,&~to ac~~it bca:il spread, so a/1=.05,.a=5.17/oz t.~M.ch ezceeds the code allowable liwts.7..e rev-e~oz" the fabricat'on accept-ace radiogra hs shcws t'.m slag indications (code acceptable) in t~gaea of the nozz e with gcod corellation to the LT evaluation.
In order to get hze ac-ate siz'~g of this larger indication ben spre"-sureÃe.ts we e tak=C.L.T/2 2nd 3/>T 3/8'c'.c.'.ete side c='~ec hol~s,~vwch~ives a bem soread a'.a'e of 1/2 ce"rees as 2~.aH".>a>>ants cn 3/1 6'.Cn=-ic 3/8~.cn ci~~i.eter ang-'0~=L-ec.:z-'-"i oot GQ"o es (-"-..)'t..e..'to vesseL c-'rat-cn~&et7&-5P.p l~~ts li' Tan Wavhach Narch 11, 1979 Sheet 2 of 2 indicaticn's metal path gave mplitudes of 50%and 112%DAC respecc'vely frcm a s~dard DAC calibracicn utilizing the sm:e search mit and wedge that vere used for the e~inations.
The 50%DAC m~~rerancs cn the 3/8 inch FBH g'ves a bema'spread angle of 6 1/2 deme s in the projection direction md 8 degre s across the bern.Sizing the 3/8 inch dimeter rnH to the 50%DAC limits gives 63/60 incnes by I 1/8 inches dir~sicns oversizing the reflector by.609 inches in the projection d~"eccicn and.750 inches across the bean.Reflectors giving similar@rod.t oes at similar natal pat~s~&eh are sized to the 50%DAC l~ts-~y be Bmected to be similarly ove sized.Bem spread cor"ect" on of the subsurface indication dizensicns as si:r~z in Fibre 2 gives a length""c" of 4.521 inches,"ac" of.1603 inches,"t"=9 inches, a/lc=.035, ac=1.78%o t, which c~~mst"ates
"'.at>"~indicat=on is allovmle unce~ae ru es of Secticn 0 1974, Table iviB-35'i0.
The indication
's locaced ne>>"'".e rozz 2 forging to weld'.tenace of the nozzle to vessel weld as sa Qvtl in"i@~e 3.it is detected bv t'.".e 15'ngle bee longiv.~ill wave e~~~'~~~ion
=~~the nozzle bore.~e~5~~ole bern sne>>wave~m the nczz~e bore, t.e 0'cngi-d'~"l,~I.S'he"--
and 60'neer wave e~~"actions
==.~".e vesse'all do noc decec"~~'s rl=-'".dicac" cn.m~" ed cn~-.e ezc~sive evaiuaticn of w~s e~ec o bv severPl Level IIi ult as%a"c BF~~~~=t:cn soec P iscs we a 2 ve j M K enc that L 2 s3~1 s cose veQ arB CUB to K c BDDBQ slaR ooseneo~~the==-br=cat~on raoz.ograp."a ano no sz.~-.chic=~~--~ewsc z~'this"Blo Rile 1 ce"c~c3 i s sKs'c'l inte~" j or sc c-D T.We PaDB t".'s i:cation~i.cs your ne s.if you have any~"-~B aues"=cns c~ce'~"-~"'s='"."ic~cicn, D Base co noc nesita=e co contact m We 2"2 Drcceedi."-;.-i=a ct~~start-up sc'".e~le ano~v ld st" I be wi I'~~co disc ss t='w 8--'".~.~ith ycu ac ycu ccnveaenc.Sincerely, Albe c E.C""'s i:: Welding and'.fences=""'ve Ezc Qz t cn"~p.Ber i 0
(.)C>>)'300'g~t53 CP-/og, gyS(.:.3 0'l>, e rg I-"-'-':O/gC Uh IFEgEiYTIJL SEA/S Ij-20" ytYI/II.SCANS 1 t'1')g~)I~)f))j~~r r'~'I7/HALI.0I YAWL E Q" gC<ALLSYslNE rem e~<I Szs<PBT (r r f t A3-4 8&Ii/SPllE!0 OP(/xiDiA Fl.AI aSIDE 81/ilED boil Es I I 1 l 0~~5 g peal~~~g~I 1 Its r' I~l lr]I r~jr I Ol 4 I