【英文标准名称】:Acoustics-DeterminationofSoundPowerLevelsandSoundEnergyLevelsofNoiseSourcesUsingSoundPressure-Engineering/SurveyMethodsforUseinsituinareverberantenvironment
【原文标准名称】:声学.声压法测定噪声源的声功率级和声能量级.混响环境中现场用工程测量法
【标准号】:ANSI/ASAS12.57-2011
【标准状态】:现行
【国别】:美国
【发布日期】:2011
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:Acoustics;Comparisonmethods;Determination;Insitu;Levels;Methods;Noisesources;Powerlevels;Pressure;Soundpower;Soundpressure
【摘要】:Specifiesamethodfordeterminingsoundpowerlevelorsoundenergylevelofanoisesourcebycomparingmeasuredsoundpressurelevelsemittedbyanoisesource(machineryorequipment)mountedinsituinareverberantenvironment,withthosefromacalibratedreferencesoundsource.Soundpowerlevel(orinthecaseofnoiseburstsortransientnoiseemission,thesoundenergylevel)producedbythenoisesource,infrequencybandsofwidthoneoctave,iscalculatedusingthosemeasurements.
【中国标准分类号】:Z32
【国际标准分类号】:17_140_01
【页数】:
【正文语种】:英语


【英文标准名称】:StandardPracticeforDosimetryinaGammaIrradiationFacilityforRadiationProcessing
【原文标准名称】:辐射处理用γ射线设备放射量测定用标准实施规程
【标准号】:ASTMISO/ASTM51702-2004
【标准状态】:现行
【国别】:美国
【发布日期】:2004
【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】:E10.01
【标准类型】:(ISO/ASTM)
【标准水平】:()
【中文主题词】:
【英文主题词】:absorbeddose;cesium-137;cobalt-60;dosemapping;dosimeter;dosimetry;gamma;installationqualification;ionizingradiation;irradiation;operationalqualification;performancequalification;radiation;radiationprocessing
【摘要】:4.1Variousproductsandmaterialsmaybetreatedwithionizingradiation,suchasgammaraysfrom60Coor137Cssources,fornumerouspurposes,includingmicrobialreductionandmaterialmodification.Dosimetryrequirementsmayvarydependingupontheirradiationapplicationandtheenduseoftheproduct.4.2Formanyproducts,theirradiationspecificationsincludeaminimumormaximumlimitofabsorbeddose,sometimesboth:aminimumissettoensurethattheintendedbeneficialeffectisachievedandamaximumlimitissetforthepurposeofavoidingproductdegradation.4.2.1Foragivenapplication,oneorbothofthesevaluesmaybeprescribedbyregulationsthathavebeenestablishedonthebasisofavailablescientificdata.Therefore,itisnecessarytodeterminethecapabilityofanirradiationfacilitytodelivertheabsorbeddosewithinprescribedlimitspriortotheirradiationoftheproduct.Also,itisnecessarytomonitoranddocumenttheabsorbeddoseduringeachproductionruntoverifycompliancewiththeprocessspecificationswithinapredeterminedlevelofconfidence.4.2.2Someexamplesofirradiationapplicationswheredosimetryrequirementsaresimilartothoserequiredforfoodirradiationorforradiationsterilizationofhealthcareproductsare:4.2.2.1Disinfectionofconsumerproduct;4.2.2.2Controlofpathogensinliquidsorsolids;and4.2.2.3Researchonmaterialeffects.4.3Forotherproducts,theirradiationspecificationsmaydependontheevaluationofchangesinthephysicalandchemicalpropertiesoftheirradiatedmaterials.4.3.1Fortheseproducts,therequirementsfordosimetrymaybelessstringent,butdosimetrydatamaybeusefulforqualitycontrol,transferoftheprocesstoanotherfacilityorforcomparisonwithdatafromotherfacilities.4.3.2Someexamplesofradiationapplicationswhereallofthedosimetryrequirementsstatedinthispracticemaynotberequiredare:4.3.2.1Cross-linkingordegradationofpolymersandelastomers;4.3.2.2Polymerizationofmonomersandgraftingofmonomersontopolymers;and4.3.2.3Enhancementofcoloringemstonesandothermaterials.4.4Forsomeproducts,therequirementsfordosimetrymaybedifferent.4.4.1Anexampleofaradiationapplicationwithdifferentrequirementsis:4.4.1.1Therequirementtodeterminetheabsorbeddoseinsiliconorothermaterialsdifferentfromwaterinradiationhardnesstestingofsemiconductorsorthemodificationofcharacteristicsofsemiconductordevices.4.5Forsomeradiationapplications,theirradiationsmaybeperformedatloworhightemperatures,causingdifficultiesindosimetry.Fortheseapplications,itmaybenecessarytoperformdosimetryatambientroomtemperaturesandrelyonprocesscontroltoensurethattheabsorbeddoseiswithinthedesiredlimits.Insomecasesitmaybepossibletousedosimetersforroutinemonitoringatthetemperatureusedfortheirradiationapplicationifthedosimetertemperatureduringirradiationissufficientlystabletoallowcorrectionfortemperatureeffectsonthedosimeterresponse.1.1Thispracticeoutlinestheinstallationqualificationprogramforanirradiatorandthedosimetricprocedurestobefollowedduringoperationalqualification,performancequalification,androutineprocessinginfacilitiesthatprocessproductwithionizingradiationfromradionuclidegammasourcestoensurethatproducthasbeentreatedwithinapredeterminedrangeofabsorbeddose.Otherproceduresrelatedtoinstallationqualification,operationalqualification,performancequalification,androutineprocessingthatmayinfluenceabsorbeddoseintheproductarealsodiscussed.Informationabouteffectiveorregulatoryabsorbed-doselimitsisnotwithinthescopeofthispractice.Note18212;Dosimetryisonlyonecompon......
【中国标准分类号】:
【国际标准分类号】:
【页数】:10P.;A4
【正文语种】:英语