Author/Authors :
J.C.Kuijper، نويسنده , , X.Raepsaet، نويسنده , , Ryan A. DeHaas، نويسنده , , W.vonLensa، نويسنده , , U.Ohlig، نويسنده , , Hartmut Ruetten، نويسنده , , H.Brockmann، نويسنده , , F.Damian، نويسنده , , F.Dolci، نويسنده , , W. Bernnat، نويسنده , , J.Oppe، نويسنده , , J.L.Kloosterman، نويسنده , , N.Cerullo، نويسنده , , G.Lomonaco، نويسنده , , A.Negrini، نويسنده , , J.Magill، نويسنده , , R.Seiler، نويسنده ,
Abstract :
Thehigh-temperaturegas-cooledreactor(HTGR)appearsasagoodcandidateforthenextgenerationofnuclearpowerplants.Inthe“HTR-N”projectoftheEuropeanUnionFifthFrameworkProgram,analyseshavebeenperformedonanumberofconceptualHTGRdesigns,derivedfromreferencepebble-bedandhexagonalblock-typeHTGRtypes.ItisshownthatseveralHTGRconceptsarequitepromisingassystemsfortheincinerationofplutoniumandpossiblyminoractinides.
ThesestudiesweremainlyconcernedwiththeinvestigationandintercomparisonoftheplutoniumandactinideburningcapabilitiesofanumberofHTGRconceptsandassociatedfuelcycles,withemphasisontheuseofcivilplutoniumfromspentLWRuraniumfuel(firstgenerationPu)andfromspentLWRMOXfuel(secondgenerationPu).Besides,the“HTR-N”projectalsoincludedactivitiesconcerningthevalidationofcomputationaltoolsandthequalificationofmodels.Indeed,itisessentialthatvalidatedanalyticaltoolsareavailableintheEuropeannuclearcommunitytoperformconceptualdesignstudies,industrialcalculations(reloadcalculationsandtheassociatedcorefollow),safetyanalysesforlicensing,etc.,fornewfuelcyclesaimingatplutoniumandminoractinide(MA)incineration/transmutationwithoutmulti-reprocessingofthedischargedfuel.
ThesevalidationandqualificationactivitieshavebeencentredroundthetwoHTGRsystemscurrentlyinoperation,viz.theHTR-10andtheHTTR.There-calculationoftheHTTRfirstcriticalitywithaMonteCarloneutrontransportcodenowyieldsacceptablecorrespondencewithexperimentaldata.Alsocalculationsby3Ddiffusiontheorycodesyieldacceptableresults.Specialattention,however,hastobegiventothemodellingofneutronstreamingeffects.FortheHTR-10theanalysesfocusedonfirstcriticality,temperaturecoefficientsandcontrolrodworth.Alsointhesestudiesagoodcorrespondencebetweencalculationandexperimentisobservedforthe3Ddiffusiontheorycodes.
