ML18031A162

Forwards Final Rept of Undersized Welds on safety-related Pipe Hangers

ML18031A162
Person / Time
Site:	Susquehanna
Issue date:	04/06/1979
From:	CURTIS N W PENNSYLVANIA POWER & LIGHT CO.
To:	GRIER B H NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
Shared Package
ML17138A569	List: ML17138A568 ML18031A162
References
NUDOCS 7904120263
Download: ML18031A162 (5)

Text

.0REGULATORYliVFORMATIONDISTHIOUTION SYSTEM(RIPS)ACCESSION IVBRo7904120263 DOC~DAI'Eo79/04/06NOTARIZED

<NODOCKETFAGIL:50387SUSQUEHANNA STEAMELECTRICSTATIONUiVIT1PEtVNSYLVA 05000350-388SUSQUE<AiutuA STEAMELECTRICSTATIONUNIT2PENNSYLVA 05008AUTH~NAtlFAUTHORAFFILIASIONCURTISFN~'TBT'PFNiNSYLVANIAPOWERttLIGHTCO~HECIP,iVAME HECIPIENTAFFILIATION GRIEHFB~H~REGION1PHILADELPHIA OFFICEOFTHEDIRECTOR

SUBJECT:

FORWARDSFlNALHEPTUf:UNDERSIZED

'r'ELDSONSAFETYRELATEDPIPEHANGFHS~8,g0-s8'7DISTRIBUTION COOK:BDINSCOPIESREEIVES:LfENCLJSIZE:5+~~TITLE:CONSTRUCTION DEFICIENCY REPORT(IOCFN50~555)~NOTES:+~D5+~>~CgF5'Rlt'&TOTS~RECIPIENT IOCODE/NAME ACTION:14PtlH<p46fZ.20LACEE)gINTERNAL:

005IHE08tlPA10QAB12JDROANtE/IE16AOFORENGR17AOREACSFTY22DIRDPMEXTERNAL:

03LPOR24ACRSCOPIESLTTHENCL11122111111111111116lbRECIPIENrIDCODE/NAME 15BCtF@legAD<MMc.cO02NHCPDR07EOO8STAFF09OEPYOIRDPM11STANORDSOFV13FIELDCOOR/IE17AOPLANTSYS19ADSYS/PROJ23OELD04NSICCOPIESLTTRENCL11111111111111111<PR181gggTOTALIVUMt3EROFCOPIESREQUIRED:

LTTR39ENCL39

TWONORTHNINTHSTREET,ALLENTOWN, PA.18101PHONE:(215)8215151NORMANW.CURTISVicePresident Engineerin8 ILCcnstrtrcticn 821-5381April6,1979RECULATQi<'(

DxitgFiLEgopy.Mr.BoyceH.GrierDirector, RegionIU.S.NuclearRegulatory Commission 631ParkAvenueKingofPrussia,Pennsylvania 17406SUSQUEiQuQlA STEAMELECTRICSTATIONFINALREPORTOFUNDERSIZED WELDSONSAFETYRELATEDPIPEHANGERSDOCKETNOS:50-387/50>>388 LICENSENOS:CPPR-101/CPPR-102 ERs100450/100508 FILE840-4PLA-343

DearMr.Grier:

Thissupplements ourlettersPLA-202datedDecember1,1977,PLA-239datedApril6,1978,andPLA-316datedFebruary2,1979andrepresents thefinalreportrelativetothesubjectdeficiency whichwasreportedundertheprovisions of10CFR50.55(e).

Thedeficiency involveddimensionally undersized weldsonsafetyrelatedpipehangersfabricated fortheSusquehanna SteamElectricStationbyITTGrinnell, Warren,Ohioundex'echtel PurchaseOrder8856-P-3.

Thenonconforming conditions represented adeviation fromhangerdetaileddesigndrawingsandrequiredanextensive evaluation ofthe"as-fabricated" undersized welds.Investigation oftheproblemrevealedthattheproblemresulted, inpart,fromthefactthatthespecification forshopfabrication ofhangers(8856-M-209) lackedspecificcriteriafortheacceptance/refection ofwelds.Thissituation wascorrected when,onOctober18,1977,Revision11ofP.O.8856-P-3wastransmitted tothesupplierandpxovidedarevisedSpecification 8856-M-.209 whichincludedappropx'iate inspection acceptance criteria.

Havingestablished thenecessary inspection criteriaforfutureproduction ofpipehangers,anextensive reinspection programforallhangersproducedbyITTGrinnellpriortoOctober18,1977wasinstituted byBechtelOCattheSSESconstruction siteonDecember1,1977andwasdevisedtopreventthe'b'sgPENNSYLVANIA POWER8LIGHTCOMPANY<90~%gN~g Mr.BoyceH.GrierApril6,1979installation ofnonconforming hangers;toverifythesupplier's compliance tothenewfabrication andinspection requirements; andtoprovideorderlycontrolsforcontinuing construction installation activities.

Visualinspections byBechtelQCconfirmed theacceptability ofallQ-listedhangersshippedbyITTGrinnellafter10/18/77.

OnDecember12,1977,theBechtelinspection effortwasdirectedtowardsallhangersatSSESwhichhadbeenfabricated priortotheOctober18,1977date.Allweldsonpipesupportsandhangercomponents wereexaminedbyBechtelinaccordance withArticle9ofASMEB&PVCodeSectionV-1971andthefollowing ANSIStandardB31.1visualacceptance criteria:

~Unacceptable indications (1)Cracks-externalsurface.(2)Undercutonsurfacewhichisgreaterthan1/32inchdeep.(3)Weldreinforcement greaterthanthatspecified inatableinPara.127.4.2oftheANSIB31.1Standard.

(4)Lackoffusiononsurface.(5)Incomplete penetration (appliesonlywheninsidesurfaceisreadilyaccessible).

~Filletweldminimumdimensions asspecified inANSIB31.1-1973.

Asnecessary, duringtheBechtelinspection effort,whichwasundertaken on12/12/77andconcluded on3/15/78,weldswhichdidnotmeetspecification requirements werereworked.

OnMarch15,1978BechtelQCconcluded theprimaryinspection functionandITT-Grinnell quality'ontrol personnel assumedtheinspection functionon-siteemploying thesame(Bechtel) visualinspection acceptance criteria.

Priortoinitiating theinspections, Grinnell's QCProgramwassubmitted toandapprovedbyBechtelEngineering.

AttheoutsetofITT-Grinnell's inspection effort,BechtelQCheldapreparatory meetingwithITT-Grinnell andestablished BechtelQCsurveillances, reviewsandwitnessandholdpoints.(BechtelQCdocuments itsactivities onFieldInspection Reportswhicharepreparedweekly.)Thereisacomputerlistingofpipehangerswhichhasbeenmodifiedtoprovidearecordofallthesafety-related pipehangersaffected.

Thelistingprovidescolumnsdesignating thehangerswhich,asdetermined bytheBechtelsurvey,havebeenjudgedacceptable orhavebeendesignated asrequiring rework.Theserecordshavebeenupdatedtoreflectwhererework'as accomplished andthestatusoftheacceptability oftheweldsaffected.

Theserecordsreflecttheinterim(12/1/77to3/15/78)Bechtelinspection andreworkeffort.

Mr.BoyceH.GrierApril6,1979RecordsofITT-Grinnell's activities aremaintained inaccordance withitsQCProgram.TherecordsofBechtelandITT-Grinnell inspections arebeingkeptasseparatedocuments.

Bothsetsofrecordscontainsimilarpertinent information.

Inconjunction withitsinspection effort,ITT-Grinnell preparedtheattachedreportoftheresults.andananalysistoverifytheadequacyoftheSusquehanna Project's hangerswhichwerefabricated byITTGrinnellinthefulfillment ofBechtelPurchaseOrderi/8856-P-3-AC Rev.12.ThisreporthasbeenreviewedandacceptedbyBechtelEngineering whohavestated:"Insummarytheconclusions ofthereportsubstantiate theadequacyoftheQ-Listedhangersinquestionbecause:(a)AllQ-Listedhangersshippedpriorto10/18/77wereinspected forundersized weldsaswellasforcompliance withtherevisedspecification requirements forvisualweldacceptance criteria.

(b)AllQ-Listedhangerswithundersized weldswereanalyzedinthe"as-fabricated" condition todetermine stresslevelsoftheundersized welds.(c)NoneoftheQ-Listedhangerswithundersized weldswerefoundtohaveweldstressesthatexceededtheagreeduponallowables.

(d)TheITTWrinnell analysisoftheundersized weldsintheQ-Listedhangershasdemonstrated thatthiscondition doesnotpresentasafetyhazardbecausenoneoftheweldswereover-stressed."

Presently, hangersinfabrication atthesupplier's plant~beingproducedinaccordance withBechtelSpecification 8856-M-209, Rev.7,areofacceptable quality.Wetherefore concludethatadditional corrective measurestoprecluderecurrence arenotnecessary.

Verytrulyyours,N.W.CurtisVicePresident-Engineering

&Construction ARS:mcbcc:Mr.J.G.Davis(15)ActingDirector-Office ofInspection

&Enforcement U.S.NuclearRegulatory Commission Washington, D.C.20555Mr.G.McDonald, Director(1)OfficeofManagement Information

&ProgramControlU.S.NuclearRegulatory Commission Washington, D.C.20555Mr.RobertM.GalloU.S.NuclearRegulatory Commission P.O.Box52Shickshinny; PA18655