【英文标准名称】:Paperandboard-Paperandboardintendedtocomeintocontactwithfoodstuffs-Determinationofcadmiumandleadinanaqueousextract;GermanversionEN12498:2005
【原文标准名称】:纸和纸板.与食物接触的纸和纸板.水萃取物中镉和铅含量的测定.德文版本EN12498-2005
【标准号】:EN12498-2005
【标准状态】:现行
【国别】:
【发布日期】:2005-11
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:水解萃取物;原子吸收光谱测定法;原子吸收分光光度测定法;纸板;镉;化学分析和试验;铬;测定;含量测定;食品包装;食品;重金属含量;重金属;铅;接触食品的材料;材料试验;分子吸收分光光度测定法;纸;光谱学
【英文主题词】:Aqueousextracts;Atomicabsorptionspectrometry;Atomicabsorptionspectrophotometry;Board(paper);Cadmium;Chemicalanalysisandtesting;Chromium;Determination;Determinationofcontent;Foodpackages;Foodproducts;Heavymetalcontent;Heavymetals;Lead;Materialsincontactwithfood;Materialstesting;Molecularabsorptionspectrophotometry;Paper;Spectroscopy
【摘要】:
【中国标准分类号】:Y30
【国际标准分类号】:67_250;85_060
【页数】:10P;A4
【正文语种】:英语


【英文标准名称】:StandardPracticeforDeterminingNeutronExposuresforNuclearReactorVesselSupportStructures
【原文标准名称】:核反应堆容器支承结构的中子辐照量测定标准实施规程
【标准号】:ASTME1035-2002
【标准状态】:现行
【国别】:
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:E10.05
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:核能;辐射;压力容器
【英文主题词】:neutron;radiation;ferritic;vessel;dosimetric;reactor;pressurized
【摘要】:Predictionofneutronradiationeffectstopressurevesselsteelshaslongbeenapartofthedesignandoperationoflightwaterreactorpowerplants.Boththefederalregulatoryagencies(see2.2)andnationalstandardsgroups(see2.1)havepromulgatedregulationsandstandardstoensuresafeoperationofthesevessels.Recently,ithasbecomeapparentthatthesupportstructuresforpressurizedwaterreactorvesselsmayalsobesubjecttosimilarneutronradiationeffects(1,2,3,4,5).7Theobjectiveofthispracticeistoprovideguidelinesfordeterminingtheneutronradiationexposuresexperiencedbyindividualvesselsupports.Itisknownthathighenergyphotonscanalsoproducedisplacementdamageeffectsthatmaybesimilartothoseproducedbyneutrons.Theseeffectsareknowntobemuchlessatthebeltlineofalightwaterreactorpressurevesselthanthoseinducedbyneutrons.Thesamehasnotbeenprovenforalllocationswithinvesselsupportstructures.Therefore,itmaybeprudenttoapplycoupledneutron-photontransportmethodsandphotoninduceddisplacementcrosssectionstodeterminewhethergamma-induceddpaexceedsthescreeninglevelof3.0x00D7;10-4,usedinthispracticeforneutronexposures.See1.2.1.1Thispracticecoversproceduresformonitoringtheneutronradiationexposuresexperiencedbyferriticmaterialsinnuclearreactorvesselsupportstructureslocatedinthevicinityoftheactivecore.Thispracticeincludesguidelinesfor:1.1.1Selectingappropriatedosimetricsensorsetsandtheirproperinstallationinreactorcavities.1.1.2Makingappropriateneutronicscalculationstopredictneutronradiationexposures.1.2Thispracticeisapplicabletoallpressurizedwaterreactorswhosevesselsupportswillexperiencealifetimeneutronfluence(E>1MeV)thatexceeds1x1017neutrons/cm2or3.0x10-4dpa.(SeeTerminologyE170.)1.3Exposureofvesselsupportstructuresbygammaradiationisnotincludedinthescopeofthispractice,butseethebriefdiscussionofthisissuein3.2.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:F74
【国际标准分类号】:27_120_20
【页数】:3P.;A4
【正文语种】: