【英文标准名称】:StandardPracticeforDosimetryinanElectronBeamFacilityforRadiationProcessingatEnergiesBetween80and300keV
【原文标准名称】:能量在80-300Kev的辐射加工用电子束设备的剂量测定的标准实施规程
【标准号】:ASTMISO/ASTM51818-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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;dosimeter;dosimetrysystem;electronbeam;electronbeamaccelerator;ionizingradiation;radiationprocessing;radiationcrosslinking;radiationcuring;ICS
【摘要】:4.1Avarietyofirradiationortreatmentprocessesuselowenergyelectronprocessorstomodifyproductcharacteristics.Dosimetryrequirements,thenumberandfrequencyofmeasurements,andrecordkeepingrequirementswillvarydependingonthetypeandenduseoftheproductsbeingprocessed.Dosimetrymeasurementsareoftenusedinconjunctionwithphysical,chemical,orbiologicaltestingoftheproduct,tohelpverifyspecifictreatmentparameters.NOTE1-Inmanycasesreferencedatamaybedeveloped,comparingdosimetryresultswithotherquantitativeproducttesting;forexample,gelfraction,meltflow,modulus,molecularweightdistribution,orcureanalysistestscanbeusedtoestimateradiationdoseinspecificrelevantmaterials.4.2Radiationprocessingspecificationsusuallyincludeaminimumormaximumabsorbeddoselimit,orboth.Foragivenapplicationtheselimitsmaybesetbygovernmentregulationorbylimitsinherenttotheproductitself.4.3Criticalprocessparametersmustbecontrolledtoobtainreproducibledosedistributioninprocessedmaterials.Theelectronbeamenergy(ineVorkeV),beamcurrent(inmA),spatialdistributionofthebeam,andexposuretimeorprocesslinespeedallaffectabsorbeddose.NOTE2-Insomeliquid-to-solidpolymerizationapplications(oftenreferredtoasradiationcuring),theresidualoxygenlevelduringirradiationmustbecontrolledtoachieveconsistentresults.Ahighlevelofresidualoxygencanaffectproductperformanceinthesecuringapplications,butdoesnotaffecttheabsorbeddose.However,oxygeneffectsontheresponsefunctionofthedosimeterusedinthemeasurementofdoseshouldbetakenintoaccount.4.4Beforeanyradiationprocesssystemcanbeutilized,itmustbevalidatedtodetermineitseffectiveness.Thisinvolvestestingoftheprocessequipment,calibratingthemeasuringinstruments,anddemonstratingtheabilitytodeliverthedesireddosewithinthedesireddoserangeinareliableandreproduciblemanner.1.1Thispracticecoversdosimetricprocedurestobefollowedtodeterminetheperformanceoflowenergy(300keVorless)single-gapelectronbeamradiationprocessingfacilities.Otherpracticesandproceduresrelatedtofacilitycharacterization,productqualification,androutineprocessingarealsodiscussed.1.2Theelectronenergyrangecoveredinthispracticeisfrom80keVto300keV.Suchelectronbeamscanbegeneratedbysingle-gapself-containedthermalfilamentorplasmasourceaccelerators.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:
【国际标准分类号】:
【页数】:8P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 硫酸铵氮含量的测定 甲醛法 |
| 英文名称： | Ammonium sulphate--Determination of nitrogen content--Formaldehyde method |
| 中标分类： |
化工 >>
无机化工原料 >>
无机盐 |
| 替代情况： | 被GB 535-1995代替 |
| 发布日期： | |
| 实施日期： | 1984-11-01 |
| 首发日期： | |
| 作废日期： | 1996-08-01 |
| 出版日期： | |
| 页数： | 2页 |
适用范围
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前言
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目录
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引用标准
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所属分类： 化工 无机化工原料 无机盐