ML010100519: Difference between revisions
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| issue date = 01/05/2001 | | issue date = 01/05/2001 | ||
| title = Interim Guidance for In-situ Pressure Testing Pertaining to Pressurization Rate | | title = Interim Guidance for In-situ Pressure Testing Pertaining to Pressurization Rate | ||
| author name = Sheron B | | author name = Sheron B | ||
| author affiliation = NRC/NRR/ADPT | | author affiliation = NRC/NRR/ADPT | ||
| addressee name = Modeen D | | addressee name = Modeen D | ||
| addressee affiliation = Nuclear Energy Institute (NEI) | | addressee affiliation = Nuclear Energy Institute (NEI) | ||
| docket = | | docket = | ||
| license number = | | license number = | ||
| contact person = Karwoski K | | contact person = Karwoski K | ||
| case reference number = TAC MA4265 | | case reference number = TAC MA4265 | ||
| document type = Letter | | document type = Letter | ||
Revision as of 08:35, 14 July 2019
| ML010100519 | |
| Person / Time | |
|---|---|
| Issue date: | 01/05/2001 |
| From: | Sheron B NRC/NRR/ADPT |
| To: | Modeen D Nuclear Energy Institute |
| Karwoski K | |
| References | |
| TAC MA4265 | |
| Download: ML010100519 (2) | |
Text
January5,2001DavidJ.Modeen,DirectorEngineering NuclearGenerationDivision NuclearEnergyInstitute 1776IStreet,NWSuite400 Washington,DC20006-3708
SUBJECT:
INTERIMGUIDANCEFORIN-SITUPRESSURETESTINGPERTAININGTOPRESSURIZATIONRATE
DearMr.Modeen:
ByletterdatedNovember8,2000,"InterimGuidanceforInSituPressureTesting"(ADAMSAccessionNumberML003770571),youprovidedthestatusofyourevaluationoftheArkansas NuclearOneUnit2(ANO-2)steamgeneratortubepressuretestingresultswhichincluded interimguidanceontheconductofin-situpressuretests.Thisguidanceincludedspecifyinga maximumpressurizationrateof200poundspersquareinch(psi)persec,addingadditional holdpointsduringtheconductofthetest,andspecifyingaminimumholdtimeoftwominutesto verifycrackstability.Iunderstandthefinalreportdocumentingyoureffortswillbepublishedin2001.ConsistentwithNRCcommentsatapublicmeetingonSeptember28,2000,(seemeetingsummarydated October,12,2000,"SummaryofSeptember28,2000,MeetingwiththeNuclearEnergy Institute(NEI)RegardingSteamGeneratorTubeBurstIntegrity"-ADAMSAccessionNumber ML003760794),theNRCstaffwillwanttoreviewthereportbeforemakinganyconclusionson thistopic.Intheinterim,themodificationsyou'veproposedtothein-situpressuretesting guidelinesappearappropriate.Inyourletter,youindicatedtheunexpectedtestresultsrelatetoanycrack,greaterthanthethrough-wallcriticalcracklength,thatcontainscracksegmentsgreaterthan90%through-wall, butthattheabsenceoftherateeffectatveryslowratesofpressurizationhasnotbeen specificallydemonstratedforotherdefectmorphologies.Nonetheless,youconcludedthere wasnodependencyonpressurizationrateinanyoftheindustrystandardcorrelationdatasets.
Regardingtheseconclusionsandobservations,itwouldbebeneficialifyoufurtherclarifiedtheir basisinyourreportinlightofthefactthattheabsenceofthepressurizationeffecthasnotbeen specificallydemonstratedforotherdefectmorphologiesindicatingtotheNRCstaffthatthe potentialexistsforthecorrelationstobeaffected.AttheSeptember28,2000,meeting,theindustryindicateditwouldconsiderdoingsomeverificationtestingoftheirhypothesesregardingthenecessaryflawmorphologyforobservation ofthepressurizationeffect.Wewouldbeinterestedinhearingtheoutcomeofthisactivity.
DavidJ.Modeen-2-Insummary,theNRCstaffbelievestheNEIinitiativeisprudentgiventheresultsoftheANO-2pressuretestsandweappreciateyoureffortsonthismatter.Ifyouwouldliketodiscussanyof thisinformationinmoredetail,pleasecontactJackStrosniderat(301)415-3298.Sincerely,/ra/BrianW.Sheron,AssociateDirectorforProjectLicensingandTechnicalAnalysisOfficeofNuclearReactorRegulation cc:JimRiley,NEI RalphBeedle,NEI DavidJ.Modeen-2-Insummary,theNRCstaffbelievestheNEIinitiativeisprudentgiventheresultsoftheANO-2pressuretestsandweappreciateyoureffortsonthismatter.Ifyouwouldliketodiscussanyof thisinformationinmoredetail,pleasecontactJackStrosniderat(301)415-3298.Sincerely,BrianW.Sheron,AssociateDirectorforProjectLicensingandTechnicalAnalysisOfficeofNuclearReactorRegulation cc:JimRiley,NEI RalphBeedle,NEIDistributionEMCBRFSCoffinRRothmanAKeim EMurphyCBeardslee REnnisLLund ZFuJTsao JBirmingham SNewberryDOCUMENTNAME:C:\NEIletteronpressurizatio~.wpdINDICATEINBOX:"C"=COPYW/OATTACHMENT/ENCLOSURE,"E"=COPYW/ATT/ENCL,"N"=NOCOPYOFFICEEMCB:DEEEMCB:DEEEMCB:DENAMEKKarwoski:kkESullivan:ejsWBateman:whbDATE12/22/0012/22/0012/22/00OFFICEDD:DE:NRRD:DE:NRRAD:ADPT:NRRNAMERHWessman:rhwJRStrosnider:jrsBWSheron:bws:DATE12/29/001/02/011/05/01OFFICIALRECORDCOPY