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铀尾矿库覆盖降氡黏土参数优化.docx

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铀尾矿库覆盖降氡黏土参数优化 Introduction Uraniumtailingsarethewasteproductsgeneratedduringtheextraction,processing,andpurificationofuranium.Thesetailingsarehighlyradioactiveandposeasignificantthreattotheenvironmentandpublichealth.Oneofthemostsignificantchallengesassociatedwithuraniumtailingsisthereleaseofradongas,whichisacancer-causingsubstance.Theuraniumtailingscontainmentsystem,includingthetailingsdamandcoversystem,isessentialtopreventthereleaseofradongastotheenvironment.Thisresearchaimstooptimizetheparametersoftheclaycoversystemtoreduceradongasemissionsfromuraniumtailings. Uraniumtailingsandradongasemissions Uraniumtailingscontainhighlevelsofradioactiveelements,includinguranium,thorium,andtheirdecayproducts.Theseelementsreleasealpha,beta,andgammaparticles,whichemitradiation.Thedecayofuraniumandthoriumalsoproducesradongas,whichisacolorless,odorless,andtastelessgas.Radongasisaradioactivegasandthesecondleadingcauseoflungcanceraftercigarettesmoking.Radongasaccumulatesinclosedspacessuchashomes,offices,schools,andotherbuildings.Still,itcanalsoseepoutofthesoilandwater,creatingasignificanthealthriskforthenearbypopulation.Radongasisachallengingpollutanttocontrolbecauseitisdifficulttodetectandtreat. Uraniumtailingscontainmentsystem Topreventthereleaseofradongasfromuraniumtailings,acontainmentsystemisrequired.Thetailingscontainmentsystemconsistsofthreeparts:thetailingsdam,thetailingscoversystem,andthegroundwatermanagementsystem.Thetailingsdamisthestructurethatcontainstheuraniumtailings.Thetailingscoversystemisthelayerofmaterialplacedovertheuraniumtailingstopreventthereleaseofradongas.Thegroundwatermanagementsystemisdesignedtocontroltheflowofwaterthroughthetailingscontainmentsystemtopreventgroundwatercontamination. CoverSystemDesign Thetailingscoversystemisdesignedtoreduceradongasemissionsbylimitingthediffusionofradongasthroughthecoversystem.Thecoversystemconsistsofalayerofclaymaterialandalayerofsoilcover.Theclaylayeristheprimarybarriertoradongasdiffusionsinceclayhasalowdiffusioncoeffici