Author/Authors :
ToshinobuSasa، نويسنده , , HiroyukiOigawa، نويسنده , , KazufumiTsujimoto، نويسنده , , KenjiNishihara، نويسنده , , KenjiKikuchi، نويسنده , , YujiKurata، نويسنده , , ShigeruSaito، نويسنده , , MasatoshiFutakawa، نويسنده , , MakotoUmeno، نويسنده , , NobuoOuchi، نويسنده , , YasuoArai، نويسنده , , KazuoMinato، نويسنده , , HidekiTakano، نويسنده ,
Abstract :
JapanAtomicEnergyResearchInstitutecarriesoutresearchanddevelopmentonaccelerator-drivensystem(ADS)totransmuteminoractinidesandlong-livedfissionproductsinhigh-levelradioactivewaste.Thesystemiscomposedofhighintensityprotonaccelerator,lead-bismuthspallationtargetandlead-bismuthcooledsubcriticalcorewithnitridefuel.About2500kgofminoractinideisloadedintothesubcriticalcore.Annualtransmutationamountusingthissystemis250kgwith800MWofthermaloutput.Thistransmutationamountcorrespondstotheamountofminoractinidesproducedfrom10unitsof1GWepowerreactorsannually.Asuperconductinglinearacceleratorwiththebeampowerof20–30MWisconnectedtodrivethesubcriticalcore.Tomaximizethetransmutationefficiency,thenitridefuelwithouturanium,suchas(Np,Am,Pu)N,isselected.ThenitridefuelirradiatedintheADSisreprocessedbypyrochemicalprocessfollowedbythere-fabricationofnitridefuel.Manyresearchanddevelopmentactivitiesareunderwayandplannedinthefieldsofsubcriticalcoredesign,spallationtargettechnology,lead-bismuthhandlingtechnology,acceleratordevelopment,andminoractinidefueldevelopment.Especially,tostudyandevaluatethefeasibilityoftheADSfromphysicsandengineeringaspects,thetransmutationexperimentalfacility(TEF)isproposedunderaframeworkoftheHigh-IntensityProtonAcceleratorProject.
