【astm標(biāo)準(zhǔn)】d 3803 - 91 (2014)

1、Designation:D3803?91(Reapproved2014)StardTestMethodfNuclearGradeActivatedCarbon1ThisstardisissuedunderthefixeddesignationD3803thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevision

2、theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodisaverystringentprocedurefestablishingthecapability

3、ofnewusedactivatedcarbontoremoveradiolabeledmethyliodidefromairgasstreams.Thesingletestmethoddescribedisfapplicationtobothnewusedcarbonsshouldgivetestresultscomparabletothoseobtainedfromsimilartestsrequiredperfmedthrough

4、outthewld.Theconditionsemployedwereedtoapproximateoperatingaccidentconditionsofanuclearreactwhichwouldseverelyreducetheperfmanceofactivatedcarbons.Increasingthetemperatureatwhichthistestisperfmedgenerallyincreasestheremo

5、valefficiencyofthecarbonbyincreasingtherateofchemicalphysicalabsptionisotopicexchangethatisincreasingthekiicsoftheradioiodineremovalmechanisms.Decreasingtherelativehuityofthetestgenerallyincreasestheefficiencyofmethyliod

6、ideremovalbyactivatedcarbon.Thewatervapcompeteswiththemethyliodidefadsptionsitesonthecarbonastheamountofwatervapdecreaseswithlowerspecifiedrelativehuitiestheeasieritisfthemethyliodidetobeadsbed.Therefethistestmethodisave

7、rystringenttestofnucleargradeactivatedcarbonbecauseofthelowtemperaturehighrelativehuityspecified.Thistestmethodisrecommendedfthequalificationofnewcarbonsthequantificationofthedegradationofusedcarbons.1.1.1Guidanceftestin

8、gnewusedcarbonsusingconditionsdifferentfromthistestmethodisofferedinAnnexA1.1.2ThevaluesstatedinSIunitsaretoberegardedasstard.Nootherunitsofmeasurementareincludedinthisstard.1.3Thisstarddoesnotpurpttoaddressallofthesafet

9、yconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2D1193Speci

10、ficationfReagentWaterD2652TerminologyRelatingtoActivatedCarbonD2854TestMethodfApparentDensityofActivatedCarbonE300PracticefSamplingIndustrialChemicalsE691PracticefConductinganInterlabatyStudytoDeterminethePrecisionofaTes

11、tMethod2.2CodeofFederalRegulations:CFRTitle49Section173.34“QualificationMaintenanceUseofCylinders’’3CFRTitle49Part178SubpartC“SpecificationsfCylinders’’32.3MilitaryStards:MILF51068DFilterParticulateHighEfficiencyFireResi

12、stant4MILF51079AFilterMediumFireResistantHighEfficiency4MILSTD45662CalibrationSystemsRequirements42.4OtherStards:ANSIASMEN45.2.6QualificationsofInspectionExaminationTestingPersonnelfNuclearPowerPlants53.Terminology3.1Def

13、initionsofTermsSpecifictoThisStard:3.1.1countereff?ciency(CE)—thefractionoftheactualnumberofdisintegrationsofaradioactivesamplethatisrecdedbyanuclearcounter.3.1.2eff?ciency(E)—thepercentageofthecontaminantremovedfromagas

14、streambyanadsptionbedexpressedmathematicallyasE=100?PwhereEParegiveninpercent.1ThistestmethodisunderthejurisdictionofASTMCommitteeD28onActivatedCarbonisthedirectresponsibilityofSubcommitteeD28.04onGasPhaseEvaluationTests

15、.CurrenteditionapprovedJuly12014.PublishedSeptember2014.iginallyapprovedin1979.Lastpreviouseditionapprovedin2009asD3803–91(2009).DOI:10.1520D380391R14.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustome

16、rServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.3PublishedbytheGeneralServiceAdministration18th“F”’St.N.W.WashingtonDC20405.4AvailablefromStardizationDocumentsderDesk

17、DODSSPBldg.4SectionD700RobbinsAve.PhiladelphiaPA191115098:dodssp.daps.dla.mil.5AvailablefromAmericanNationalStardsInstitute(ANSI)25W.43rdSt.4thFloNewYkNY10036:www.ansi.g.Copyright?ASTMInternational100BarrHarbDrivePOBoxC7

18、00WestConshohockenPA194282959.UnitedStates1atatmosphericpressure.Iftestconditionswhichdiffersignificantlyfromthesearerequiredthenseparatecalibrationsinstrumentationbothmayberequired.6.4SaturatSystem—Thissystemmaybeacontr

19、olledtemperaturesaturat(bubbler)spraychamber(environmentalconditiongenerat)anyotherdeviceofsufficientstabilitycapacitytosupplytherequiredmassflowofwatervapattestconditions.6.5FlowGenerat—Thissystemmaybeanaircompressupstr

20、eamofthetestsystemavacuumpumpdownstreamofthetestsystem.AdryercarbonadsberHEPA(highefficiencyparticulateair)filterarerequiredfeithersystemtoconditiontheinletair.Flowmeasurementcontrolshouldbeaccuratestabletowithin62%ofspe

21、cifiedflowrate.Systemcapacityshallmeetexceedthevolumetricflowrequirementsascalculatedfromthespecifiedfacevelocity.Asurgetankpressurecontrolvalveshouldbeemployedineithertypeofsystemtoensurestableaccurateflowmeasurementcon

22、trol.Fsafetyitisimptantthatthepressuresystembeequippedwithapressurereliefvalve.Itisimptantthatthepipediameterinletairfiltersfavacuumsystembedesignedmaintainedtominimizethepressurefromambienttoensurethatthespecificationsf

23、absolutepressureatthetestbedaremet(seeTable1).6.6MoistureSeparat—AmoistureseparatshouldbeusedtoprotecttheHEPAfilterbyremovinglargequantitiesofentrainedparticulatewaterifpresentafterhuification.AHEPAfilter(equivalent)isre

24、quiredtofunctionasafinallettraptoremovesmallamountsoffineparticulatewaterfromthecarriergasaheadofthetestbed.6.7AdsbateSupply—Thissystemshallconsistofastainlesssteelcylinderpressuregagepressureregulataflowregulatcapableof

25、providingasteadyflowofthechallengegasthatisradiolabeledmethyliodideindrynitrogenfthedurationofthetestfeedperiod.Thepointofinjectionintothemaingasflowofthesystemmustbesuchthatthecrosssectionaldistributionoftheadsbateatthe

26、faceofthetestbedcanbeensuredtobehomogeneous.Amixingchamberbafflesglassbeadsetc.shouldbeusedtoachieveadequatemixing.6.8ConstantTemperatureCabi—Anenclosureassociatedthermegulatysystemmustbeusedthatiscapableofmaintainingthe

27、inletgasstreamtemperaturefromthepointofhuitycontroltothetestbedthesurfacetemperatureof1—Canister(fourshown)2—Inletcap3—Outletcap4—Thermocouple5—Thermocouplefitting6—Statictap7—Tiebar(four)8—OringsealsFIG.2CanisterAssembl

28、y(TestBackupBeds)TABLE1ParameterSpecificationsNOTE1—Temperaturerelativehuitypressuregasvelocityaretoremainconstantwithinthespecifiedmaximumvariationsthroughouttheentiretestthatisfeachtestperiod.Parameterexcursionsoutside

29、thelimitsspecifiedinthistablewillinvalidatethetestresults.Ifresultsbasedonatestcontainingsuchvariationsmustbereptedthenthesevariationsmustbenotedinthecommentssectionoftheexternalreptfmflaggedintheparametermonitingptionof

30、theinternalrept.ParameterPreEquilibration(First16h)EquilibrationChallengeElution(Final4h)TemperatureC30.00.430.00.2Range29.6to30.429.8to30.2Relativehuity%91.0to96.093.0to96.0Flowmmin12.20.612.20.3Facevelocitymmin11.6to12