Second interim deficiency rept re inadequate as-constructed weld … · 2012. 12. 1. · Our first...
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TElNNESC» VALLEY AUTMOMTY CNAtfAWxOnA TfNNqoSqt 19%401 90 1579 L•OOM" PFa40 FEB 181887 S.5.)-w /S-*» t e** 9 9** )*> WW-9S3-H4/M-M V.I. ifMlor Slulatmry Commslelo Aftt: keIomet Coetrol 0ok Offlice f k•loer seetfr ugseletit L MwehLtamt, D.C. 205o5 AttmtieLe Dr. J. ohel Grrse ATm T S WCLUEA PMAr WITl 1 ADO 3 - IADUQATn AS-COwITWCTiD WID COWICT•lao o Cor 0L WIttLDI VcUCAtL, IMUA• - M•D.-W)-0/8S69.. w- o-«91i/6-1O - a m I mrN 3IlPOT The subjoet eficiLency wre Initially reqrto4 to tNC-flon II lnq:M Cer Iomrritr Sre oen October 20. 1WQ , In .eordano with 10 CI 50.s5(*). Me 8CI um cal Mo. ltem lred Mwe ntifld4 te Jmnry I, 1W. . tht TVA *oiders thks defelelmy to repr *en t * eipLo•at broeabde Ln the Quality Amwurm.e (qA) ProSr m f this *ru of *tructurl **.el weldin Inspe tlon. Our first interlm report e submitt4e on oevember 9., H19. bStele4 Li our seo4d Interli report. We oms t to subit our final report on or bout Augut 7, 1l»»» If ther are any questions. pvloee Get in tech wIH rh . D. ebalI at (615) M3-0527. ery truly yours. TIIMUU VALLU AUTW TY r. Gril41y. tractor au ar tof ty and Litensinl ne loeure gc: Ie page 702 P an M! -~~~ , .t
Transcript of Second interim deficiency rept re inadequate as-constructed weld … · 2012. 12. 1. · Our first...
TElNNESC» VALLEY AUTMOMTY
CNAtfAWxOnA TfNNqoSqt 19%401
90 1579 L•OOM" PFa40
FEB 181887 S.5.)-w /S-*» t e** 9 9** )*>
WW-9S3-H4/M-M
V.I. ifMlor Slulatmry Commslelo Aftt: keIomet Coetrol 0ok Offlice f k•loer seetfr ugseletit L MwehLtamt, D.C. 205o5
AttmtieLe Dr. J. ohel Grrse
ATm T S WCLUEA PMAr WITl 1 ADO 3 - IADUQATn AS-COwITWCTiD WID COWICT•lao o Cor 0L WIttLDI VcUCAtL, IMUA• - M•D.-W)-0/8S69.. w- o-«91i/6-1O - a m I mrN 3IlPOT
The subjoet eficiLency wre Initially reqrto4 to tNC-flon II lnq:M Cer
Iomrritr Sre oen October 20. 1WQ , In .eordano with 10 CI 50.s5(*). Me 8CI
um cal Mo. ltem lred Mwe ntifld4 te Jmnry I, 1W. . tht TVA *oiders thks defelelmy to repr *en t * eipLo•at broeabde Ln the Quality
Amwurm.e (qA) ProSr m f this *ru of *tructurl **.el weldin Inspe tlon.
Our first interlm report e submitt4e on oevember 9., H19. bStele4 Li our
seo4d Interli report. We oms t to subit our final report on or bout Augut 7, 1l»»»
If ther are any questions. pvloee Get in tech wIH rh . D. ebalI at
(615) M3-0527.
ery truly yours.
TIIMUU VALLU AUTW TY
r. Gril41y. tractor au ar tof ty and Litensinl
ne loeure gc: Ie page
702 P
an M!
-~~~ , .t
-a
V.s. ... .H ef.., e..r rt~- FEB 1 197
Mr. Gwr 4. 2skh. Direste TWA Projoets U.S. klAeer Setu*tory Co•rsatea les Le II tOl lorlette Street. IW. suLt 2q00 Atlents. Go.rtL* )032)
Seo4rds Cent-r Institute of eiKlor Power Operatlen 1t00 Circle 75 Parktwy. SwLt 1500 Atlents. Gner L* 30)3
U.I. uIIleer Iestup tory ComPlsten Watts ar beid4nt tInpector P.O. seu 100 Spring City. Tenmesw )1)81
Wvn Wa WmaiM FLAI smi I 111111118110 AS-OMUUWC? WM~ CANGTWU NO C"wIu@ MSWILSIN
Ws -Cm WWO
mmmm~ or wwmela
herbs t0e "view ot veod Sevbattee poports CWMO) for the Waest a" tecleer ?laxt (UM) Welt Program. Golewlaiemao geto OMMd to chech the adeqwemy 0f %No "e-contrustod wWeled eeme..Ibe" for the maeifrvatha *eid boacet" lot the meleE roMP ft to cable troy supper% Leeds Lot She Central Owildimg (Blevation 701.0 Sewml of %M"eseoumwectbe proved to be sefed aogot &w %4o waderviae, umdorlemth. ead eboloot weldc.
The". sor~dtieft were identifiled during inepeetiono associated with the WuV weld "tmpl Prooram. Weld., found to devitet free the inopeatilam criteria were describe on WMO. Th e"W~ were vowbeittod to the d#Otis* oegamilatio for evaluation of the welded c0"emekkoft to 49oteiUfte, if they were meltablo for aervice.. Whs conditioni involooo too. WOfe thW aftler ovolvatkie based am the original der..6n ealculattoe" "re deemed to be unsuitable for Oeivice (i.o.. the stroosse In the weld"daeiote~ ascoeded AZ5EC aloeb ). Tree WOM are for moist taming eommeetions and seven WOX9 art tor brocir4 somaietieo" to mainfromi-4 due to table troy uwport loadiogo. Afte o, volust Lam of approximiatelt SO strvetoral-r*1*4od WODs the soa WW~ describe for 1lovatioa 141.0 were the soly o*ea deemed moswiteble for sorvico.
The maiotrwig sonnestion, WOO etem from is lack of thorough weld inape-etion. The Wracitag somwetiam, WOO. etoe from desisner's failure to recognise a conflict between two ceenectioe details. failure of censtnhctiea verseuinl to notify design porsomwwl of the "ndificatioeft to the conaectiams. and & took of proper weld inspetion. TVA has #ottesyimd that tin this spocifi( area of structural steel weld inspection. & significant broakdown in the m)ality Ansursece, (4A) Prolgrap %he.occurred.
SAELHEIWL!CUMhh
The meinframing for the access platform of Elevation 741,0 &toe carries cable troy e~pport loads. This framing to conjunction with other membeve provide & method of supporting end transferring both the vertical and herisontal eeismic leeds. It some of the member were to fail, the load could possibly redistribute to other membkers of the systte and have no adverse structural effects. However. if the load. do not redistribute during a Safe Shutdoom Parthquab. (which to our Design lasi# Eathquahe), teveral members coueld poentoially fail. Failure of the main structural fraising enid bracing could possibly cause, subsequent f4iturs of 13 tables. Coaaeeukntly. this condition Potentially could adversely affect the safety of operation of the plant had it remained uocorrected.
vs to #Uf1Wrrq .9I teS41 w 1is S Me iE& y *I Performingr& f #s*O7vtv of to
It@"O V41N4WfO WOM4 00 14 4090 #*Ottlt o -mi ltt it* 400"uyV. "it rewlyt ai e w Iw A h. dhf&.ti1.m 0samewO&.4 s * foito*, TMe #tv,+1v*&& tibathbofte a of 0 6 ohe sk so1,.4e . ow a M4 thoi .. *#qmqi" of oewlo
fatlAwe gas poly bvt dosm4aO4 6.vtwboely cher slooh robLpyi o to go"I1014
A ro#L144 m.4.1, r$1,1,1,1a %NO 4IW41, gll,. trOy :Pe*fto, (Orimt' .l v* , .6
olrt'bL5h lthe feaulensf of 00. *so"delafto. Kv~wiaftta 00 ortigis.4 l4ef W6.
wttilisiAO tho ro"Sks Iro iht roli.4 3"htoer 0a040t. r*v..l,.4 06%l Ove WBg wore wih tobto, to I*## s4 the" vote wm* itClb,@ fot "evio.
TVA it p~orte"4s .a t ooreent wolb4.v (W*l&%4.sr Pr...4lcro 1,). to ieap..O
WA 4e04~t th. 11 qq414 I4 .. ftriaur~rto1. of .r.h flt4 v01404 669%^06sta On
glovottea 141.0 of %%e Coentrol bmit4i"41. T% at *0%,u t alcovtioeft of 00 WOW4
will bo, #vO1"tO POT st""W %motfteartng Proca~ure - 81ý01 446thot the r#Oftk1Of &t tOh 9i6ftl#6lWtt Oav"4d fro& h. f.Otsh d M040. 4A4 fep.irO Of
ro4ovigs of v.1,4 will 1he *evom91,oth*4 #s 40 fto tlo maot 4etilft *l1,.vob1 end rc14toto?7 rvq14trevfeto. It 4^y wvt tP 4bermtsw4 to %& au14tt0&, for
NHrvig*. but it 4000 not Pboo reulatory cursnP it will tow sither
ropakr*4 or rs4.ooi"h'4 to ee covaswtlh reclaof ry jue rrrmfti. ;*vrid
w.ptr. he..* sLrot4y Won In49. A44ttioma1Ly. 64 wI'igat * "wsftaurs v14. toonentlteio On evatt omyeA 729.P l04 t0ur 4 feur *rly coA1iF.re4 vol4o4
soMaeaIlkLge on Kiovtiof I1S.-0 h*vo 10-a IA1,'4e4 to FnvK40 Ohot tOh problos
%u be"4 provefI? bopa4e4.
Alth.oak rool t u.g hCc *.*l yeo tr 1 c1,4011 i*r!I,7 fiv. NAcL4ur6o in the
v.141st I"Votioft area4 hW. boOen t~heoi to mwaphttr the porftorvnso so f 4IWnt4
itntoetofi. A Ayo-flm w* tft* intiw4 w*1'4 161,0 rwhich 4e4 la),pu4. proevstbOL
&eot*4 i. t1rph1oferto *o ratitpe.04 0Y poor th0Pisol16O ftor 444417. I%
4441tin . TVA %40 i40 lamoamie4 a tOW.1 ,III e4l0Oy COMlrV (OC) 61WWe4l
?rQ..ollr 7r06'444 otf4ttLi41 "1i4 t 10sA I %Oflhl tO. Fv foQrmes O1 QC lrfeeorti wOiViteoP 6a0 6 fdost 1b40i 00 efttP4r e 114t 1 o1riifd1, vOt~irs
ta6pesltono 40e thIfs partd'ur11e to .otla hohe4 Viye 1r-ts 4#4 *ecaaptafte sflttvl. 4 *eTolm. Thko vill it'proo our outprogr for o seatftt ihipogtioas
TVA is presenitl revilwti% thit adticief 1y t4o ftcie-" the feet 4140*t of tOh
brorebdees in th. QA prezr4a. TVWOI 0 villt b0 CV41,4414 te C01t14fO10 t1.
pe..tO *5f 0V41001 49ti0110 4t'U t4160 ae4f th0t th0W 0oop. of OVh PV01,o if
TVA Will proVt4a tt'd *ithl V.Pob to Mb U*1i. j. r tte ft or 4b.tt A#41P0 1.
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