【astm標(biāo)準(zhǔn)】c 1689 - 08a (2014)

1、Designation:C1689?08a(Reapproved2014)StardPracticefSubsamplingofUraniumHexafluide1ThisstardisissuedunderthefixeddesignationC1689thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevisi

2、ontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thispracticeisapplicabletosubsamplinguraniumhexafluide(UF6)usin

3、gheatliquefactiontechniquesfrombulkcontainersobtainedinconfmancewithC1052intosmallersamplecontainerswhicharerequiredflabatyanalyses.1.2ThevaluesstatedinSIunitsaretoberegardedasstard.Nootherunitsofmeasurementareincludedin

4、thisstard.1.3ItisassumedthattheliquidUF6beingsampledcomprisesasinglequalityquantityofmaterial.Thispracticedoesnotaddressanyspecialadditionalarrangementthatmightberequiredftakingproptionalcompositesamples.1.4Thenumberofsa

5、mplestobetakentheirnominalsampleweighttheirdispositionshallbeagreeduponbetweentheparties.1.5Thescopeofthispracticedoesnotincludeprovisionsfpreventingcriticalityincidents.1.6Thisstarddoesnotpurpttoaddressallofthesafetycon

6、cernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2C787Specificat

7、ionfUraniumHexafluidefEnrichmentC859TerminologyRelatingtoNuclearMaterialsC996SpecificationfUraniumHexafluideEnrichedtoLessThan5%235UC761TestMethodsfChemicalMassSpectrometricSpectrochemicalNuclearRadiochemicalAnalysisofUr

8、aniumHexafluideC1052PracticefBulkSamplingofLiquidUraniumHexafluide2.2OtherDocuments:ANSIN14.1UraniumHexafluide:PackagingfTranspt3ISODIS7195PackagingofUraniumHexafluide(UF6)fTranspt4USEC651TheUF6Manual:GoodHlingPracticesf

9、UraniumHexafluidelatestrevision53.Terminology3.1TermsshallbedefinedinaccdancewithTerminologyC859exceptfthefollowing:3.1.1samplebottle—thevessel(typicallya1S2Sbottle)intowhichthesampleofUF6iswithdrawnfromthecontainerftran

10、sfertothelabatyanalysisdispatchtothecustomer.3.1.2subsampletube—thesmallvessel(fexampleaP10tube6)intowhichasubsampleofUF6iswithdrawnfromthesamplebottlefanalysisofUF6qualitydispatchtothecustomer.3.1.3subsamplerig—theequip

11、menttoperfmthetransferofliquidUF6fromthesamplebottleintothesubsampletubetypicallyavacuummanifoldequippedwithheatingaliquidnitrogentrap.4.SummaryofPractice4.1TwomethodsofwithdrawingasubsampleofUF6aredescribedwhichdifferba

12、sedonsafetyrequirementsnamely:1ThispracticeisunderthejurisdictionofASTMCommitteeC26onNuclearFuelCycleisthedirectresponsibilityofSubcommitteeC26.05onMethodsofTest.CurrenteditionapprovedJan.12014.PublishedFebruary2014.igin

13、allyapprovedin2008.Lastpreviouseditionapprovedin2008asC1689–08a.DOI:10.1520C168908aR14.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard

14、’sDocumentSummarypageontheASTMwebsite.3AvailablefromAmericanNationalStardsInstitute(ANSI)25W.43rdSt.4thFloNewYkNY10036:www.ansi.g.4AvailablefromInternationalganizationfStardization(ISO)1ch.delaVoieCreuseCasepostale56CH12

15、11Geneva20Switzerl:www.iso.ch.5AvailablefromUnitedStatesEnrichmentCp.6903RockledgeDr.BethesdaMD20817.6PolychlotrifluoethyleneP10tubesarewidelyacceptedbytheindustryfsubsamplecollectionsubsequentUF6qualityanalysesdispatcht

16、othecustomer.OthertypesofsubsampletubesfexampleP20P80P100canbeusedfinternalsubsamplecollectionprocessing.Dispatchofthesesubsampletubesmaybeagreeduponbybuyersellersubjectto(local)transptregulations.Copyright?ASTMInternati

17、onal100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates16.4PolychlotrifluoethyleneSubsampleTubeClosingDisc(Fig.4)—Thetubemustbeofunifmdensityfreefromcracksocclusionsabletowithsttemperaturesfrom–195Cto150C.M

18、aterialsofconstructionindirectcontactwithliquidUF6aremadefrompolychlotrifluoethylenePTFETFE(gaskets)materialshavingcomparableresistancetoUF6crosion.6.5FlareNutPlug—Flarenutsplugsfsubsampletubeclosurestagetransptcanbecons

19、tructedfromMonelnickelhighnickelalloys316SS.6.6PolychlotrifluoethyleneKnockoutCylinder(Fig.5)closedwithaCajonM16VCR1femalenutanM16VCR4malenutequivalent.NOTE1—Brnamesmentionedinthispracticeareintendedtobetypicalnotlimitin

20、g.Anotherbrwithcomparableacteristicscouldperfmequallywell.6.7NickelFilterDiscpous2mfreeofchromium(Fig.6).NOTE2—Thefilterdiscshouldweighapproximately1g.Itshouldbemadeofnickelpowderproducedfromcarbonylnickelfmedbythenopres

21、suresinteringmethodingraphiteceramicmolds.6.8GasSampleCylinder.6.9HeatSources—Heatgun(anequivalent)heatlamps.6.10DewarFlaskfliquidnitrogenstainlesssteel.7.Hazards7.1Uraniumhexafluide(UF6)isradioactivetoxichighlyreactivee

22、speciallyinthepresenceofreducingsubstancesmoisture.SafetechniquesmustbeutilizedwhenhlingUF6.SuitablehlingproceduresaredescribedinUSEC651.7.2FollowallsafetyproceduresfhlingUF6asprovidedbyyourfacility.7.3ReviewMaterialSafe

23、tyDataSheetsfUF6allchemicalsassociatedwiththismethodpritoperfmance.7.4Perfmsubsamplingoperationsinafumehoodthathasbeenverifiedoperablehasundergoneregularinspectionstoensureproperairflow.7.5Whenreleasedtoatmospheregaseous

24、UF6reactswithmoisturetoproduceHFgasUO2F2particulates(awhiteamphoussolid)becomesreadilyvisibleasawhitecloud.ThecrosivenatureofHFUF6canresultinskinburnsNOTE1—AlllinesindirectcontactwithliquidUF6are3?8in.(9.5mm)Moneltubing.

25、NOTE2—Allotherlinesare?in.(9.5mm)316SStubing.NOTE3—Valves1–3areMonelbelowsealedvalvesthatcanbeoperatedfromoutsidethehotbox.NOTE4—Valves4–8are316SSbelowsealedvalves.NOTE5—Flangeconnectionsareequippedwithhelicoflex(highpre