ASTM D3803-1991(2009) 核级活性碳的标准试验方法
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【英文标准名称】:StandardTestMethodforNuclear-GradeActivatedCarbon
【原文标准名称】:核级活性碳的标准试验方法
【标准号】:ASTMD3803-1991(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1991
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Activatedcarbon;Containmentsystems/applications;Iodineretentiontest;Methyliodidepenetrationtest;Nuclearreactorvessels
【摘要】:Theresultsofthistestmethodgiveaconservativeestimateoftheperformanceofnuclear-gradeactivatedcarbonusedinallnuclearpowerplantHVACsystemsfortheremovalofradioiodine.1.1Thistestmethodisaverystringentprocedureforestablishingthecapabilityofnewandusedactivatedcarbontoremoveradio-labeledmethyliodidefromairandgasstreams.Thesingletestmethoddescribedisforapplicationtobothnewandusedcarbons,andshouldgivetestresultscomparabletothoseobtainedfromsimilartestsrequiredandperformedthroughouttheworld.Theconditionsemployedwereselectedtoapproximateoperatingoraccidentconditionsofanuclearreactorwhichwouldseverelyreducetheperformanceofactivatedcarbons.Increasingthetemperatureatwhichthistestisperformedgenerallyincreasestheremovalefficiencyofthecarbonbyincreasingtherateofchemicalandphysicalabsorptionandisotopicexchange,thatis,increasingthekineticsoftheradioiodineremovalmechanisms.Decreasingtherelativehumidityofthetestgenerallyincreasestheefficiencyofmethyliodideremovalbyactivatedcarbon.Thewatervaporcompeteswiththemethyliodideforadsorptionsitesonthecarbon,andastheamountofwatervapordecreaseswithlowerspecifiedrelativehumidities,theeasieritisforthemethyliodidetobeadsorbed.Therefore,thistestmethodisaverystringenttestofnuclear-gradeactivatedcarbonbecauseofthelowtemperatureandhighrelativehumidityspecified.Thistestmethodisrecommendedforthequalificationofnewcarbonsandthequantificationofthedegradationofusedcarbons.1.1.1GuidancefortestingnewandusedcarbonsusingconditionsdifferentfromthistestmethodisofferedinAnnexA1.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G76
【国际标准分类号】:
【页数】:18P.;A4
【正文语种】:英语
【原文标准名称】:核级活性碳的标准试验方法
【标准号】:ASTMD3803-1991(2009)
【标准状态】:现行
【国别】:美国
【发布日期】:1991
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Activatedcarbon;Containmentsystems/applications;Iodineretentiontest;Methyliodidepenetrationtest;Nuclearreactorvessels
【摘要】:Theresultsofthistestmethodgiveaconservativeestimateoftheperformanceofnuclear-gradeactivatedcarbonusedinallnuclearpowerplantHVACsystemsfortheremovalofradioiodine.1.1Thistestmethodisaverystringentprocedureforestablishingthecapabilityofnewandusedactivatedcarbontoremoveradio-labeledmethyliodidefromairandgasstreams.Thesingletestmethoddescribedisforapplicationtobothnewandusedcarbons,andshouldgivetestresultscomparabletothoseobtainedfromsimilartestsrequiredandperformedthroughouttheworld.Theconditionsemployedwereselectedtoapproximateoperatingoraccidentconditionsofanuclearreactorwhichwouldseverelyreducetheperformanceofactivatedcarbons.Increasingthetemperatureatwhichthistestisperformedgenerallyincreasestheremovalefficiencyofthecarbonbyincreasingtherateofchemicalandphysicalabsorptionandisotopicexchange,thatis,increasingthekineticsoftheradioiodineremovalmechanisms.Decreasingtherelativehumidityofthetestgenerallyincreasestheefficiencyofmethyliodideremovalbyactivatedcarbon.Thewatervaporcompeteswiththemethyliodideforadsorptionsitesonthecarbon,andastheamountofwatervapordecreaseswithlowerspecifiedrelativehumidities,theeasieritisforthemethyliodidetobeadsorbed.Therefore,thistestmethodisaverystringenttestofnuclear-gradeactivatedcarbonbecauseofthelowtemperatureandhighrelativehumidityspecified.Thistestmethodisrecommendedforthequalificationofnewcarbonsandthequantificationofthedegradationofusedcarbons.1.1.1GuidancefortestingnewandusedcarbonsusingconditionsdifferentfromthistestmethodisofferedinAnnexA1.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G76
【国际标准分类号】:
【页数】:18P.;A4
【正文语种】:英语
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