RG1.107 安全壳结构中预应力钢筋水泥灌浆的资格鉴定 1977

0U.S.NUCLEARREGULATORYCOMMISSIONRvsoeray17OFFICEOFSTANDARDSDEVELOPMENTREGULATORYGUIDE1.107CIUAUIFICATIONSFORCEMENTGROUTINGFORORESTRESSINOTENDONS'IN-CONTAINMENTSTRUCTURESA.INTRODUCTIONGeneralDesignCriterion1.QualityStandardsandRecords.ofAppendixA,GeneralDesignCriteriaforNuclearPowerPlants,to10CFRPart50.LicensingofProductionandUtilizationFacilities.requiresthatstructures,systems,andcomponentsimportanttosafetybedesigned,fabricated,anderectedtoqualitystandardscommensuratewiththe-importanceofthesafetyfunctionstobeperformed.Theprestessingtendonsystemofaprestressedconcretecontainmentstructureisaprincipalstrengthelementofthestructure.Sincetheabilityofthecontainmentstructuretowithstandtheeventspostulatedtooccurduringthelifeofthestructuredependsonthefunctionalreliabilityofthestructure'sprincipalstrengthelements,anysignificantdeteriorationofthe,prestressedelementsduetocorrosionmay.present-potentialrisktothepublicsafety.Henceitisimportantthatanysystemforinhibitingcorrosionoftheprestressingelementspossessahighdegreofreliabilityinperformingitsintendedfunction.ThisguidedescribesqualitystandardsacceptabletotheNRCstafffortheuseofportlandcementgroutasthecorrosioninhibitorforprestressingtendonsinprestressedconcretecontainmentstructures.TheAdvisoiryCommitteeonReactorSafeguardshas-beenconsultedconcerningthisguideandhasconcurredintheregulatoryposition.'Forthepurposesofthispidie,atendonisdefnedasate=nWonedsteletentconwisinofwiresStrands.orbarsanchoredateachendtoanandanchorageassmbly.CLinesindicatesubstantivechangfrompreviousiss=.a.DISCUSSIONTherecommendftionsofthisguideareapplicablewhenportlandcementgroutisusedasthecorrosioninhibitorfoirthehighlystressedtendonsofprestressedconcretecontainmentstructures.Therecommendationsoftheguidearenotintendedforuseinrelationtothegroutforfoundationanchors.Todate,thestaffhasevaluatedapplicationsproposinggroutasthecorrosionprotectionsystemforbothbartendonsandstrandtendons.Thereommendationsofthisregulatoryguidethereforeapplyto'agroutedtendonsystemwhenthetendonisfabricatedfromeitherbarsorstrands.Forproutingofwiretendons,aprogrambasedonsimilarqualitystandardsmaybedevelopedandsubmittedtothestaffforevaluation.Unlikegreasedtendons.groutedtendonsarenotavailablefordirectinspectionaftertheyareprouted.Itisthereforeessentialthattheproposedgroutandproutingprocedurebethoroughlyevaluatedbeforeitisusedintheconstructionofthecontainmentstructure.Ana4vantageofgrouting,inadditiontoprovidingcorrosionprotection.isthatawell.designedandwefl-constructedgroutedtendonsystemprovidesadegreeofbondbetweenthetendonsandthesurroundingconcrete.Thisbondinturnhelpstheanchoragesystemtoresistthefluctuatingstressesthatariseafterconstructionofthestructure.SectionIll.Division2,CodeforConcreteReactorVesselsandContainments,oftheASMEBoilerandPressureVesselCode(Ref.1)providessomerequirementsforproutconstituentsandfortheUSNRCREGULATORYGUIDESCon-mmtahuWtoamitoVrnsoeetavttaeCesaftiame.U.S.mtwsseReguieorvGuiseOft01108011tosC011114uandaMakCeheOW11811O1116111gui4tofCemmwesen.Waahungta.D.C.11tLteartion:DSo~tiU&5W**thodacgpabICtoseeCRCstaffofnlobeeumenstaaci&imanstofm~eSevcetoCommiwuaonaragultiouns.todelineatevichneqesusubva*staffon*vw.TMfisadesaftMaueinIMefaowengltoobreadiviseieqnaoecsiftpreiemaorPostulatedactdentoertoprevadeguodescetoasoobWOUt.RegulaeaivGuidneslnoteubkgiutlesarroegulations.endearnouelhan1.PowRectnFrclWafhtlsWmiS1501inequvdMeodiiiandesaolublitardilffwenkeratosseetCut,0.RemandTestfteelaf7.TransportationVieOvidellitbeacceptableifglueyProvidaabeMforthefindigrequisiteto&eeftOWdMagantaculteeies&.ociempUsnalNefth111easuenceorvenanwanceafagoermitorlScmFtheCormmieaon..4LI*wnwadUinIl.AntialsnRowe*COrnmnemeendgg~iaoomforkaprewenentarinWAesguidnesmancoursped5MaterialsendpiantProection1I.ganeral,atOahtie.endguisewhiberaelled.nseperegrsta.toeaCommondoetcaon..5antoIetRaewmt~allinorexpenvenca.Howewr.GornmentsonCopeesofptsbiahefgoidtowaybeabtainebvwrittenrequestmidicatnMeetWSgusde.itseeawedwncsinaboututwomosssafestinmuancs.wlinber-dWslfonrderstotheU.S.NuclearRegtdatorComintimmon.Waklttiglea.D.C.tictatumluneautsngtseneeforansent,rase.s2M.AttentionDsrector.officeofStandardsDaupelopronem.physicaland-chemicalpropertiesofgrout.RegulatoryPositionC.1ofthisguidebrieflydescribesminimumqualitystandardsforgroutmaterials,referencingtheASMECodeArticleswhereapplicableandacceptabletotheNRCstaff.Theregulatorypositionalsooutlinesimportantconsiderationsaffectingpropergrouting.References2,3.and4,aswellasdatafurnishedbyapplicantswhohaveproposedgroutasthecorrosioninhibitorforprestressingsteel,havebeenusedtoarriveatthisposition.AppendixAtothisguideprovidesalistofrelevantliteraturethatmaybeusedbytheapplicanttoestablishproceduresandcriteriaforthespecificgroutedtendonprogram.However,thelistingofthesereferencesdoesnotconstituteablanketendorsementbythestaffoftheircontent.Specificareasofconcernthatshouldbegivenproperattentionduringthedevelopmentofagroutedtendonsystemarediscussedkathefollowingparagraphs.Theeffectivenessofgroutinperformingitsintendedfunctionofinhibitingcorrosi