Boiling_Water_Reactor_Systems

《Boiling_Water_Reactor_Systems》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、ReactorConceptsManualBoilingWaterReactorSystemsBoilingWaterReactor(BWR)SystemsThischapterwilldiscussthepurposesofsomeofthemajorsystemsandcomponentsassociatedwithaboilingwaterreactor(BWR)inthegenerationofelectricalpower.USNRCTechnicalTrainingCenter3-10400ReactorConceptsManualBoilingWaterRea

2、ctorSystemsContainment/DrywellReactorVesselSteamLineTurbineBuildingElectricalThrottleGeneratorValveSteamDryer&MoistureSeparatorTurbineReactorCoreCondenserJetPumpTo/FromRiverRecirculationPumpPumpContainmentSuppressionChamberBoilingWaterReactorPlantInsidetheboilingwaterreactor(BWR)vessel,ast

3、eamwatermixtureisproducedwhenverypurewater(reactorcoolant)movesupwardthroughthecoreabsorbingheat.ThemajordifferenceintheoperationofaBWRfromothernuclearsystemsisthesteamvoidformationinthecore.Thesteam-watermixtureleavesthetopofthecoreandentersthetwostagesofmoistureseparation,wherewaterdropl

4、etsareremovedbeforethesteamisallowedtoenterthesteamline.Thesteamline,inturn,directsthesteamtothemainturbinecausingittoturntheturbineandtheattachedelectricalgenerator.Theunusedsteamisexhaustedtothecondenserwhereitiscondensedintowater.Theresultingwaterispumpedoutofthecondenserwithaseriesofpu

5、mpsandbacktothereactorvessel.Therecirculationpumpsandjetpumpsallowtheoperatortovarycoolantflowthroughthecoreandchangereactorpower.USNRCTechnicalTrainingCenter3-20400ReactorConceptsManualBoilingWaterReactorSystemsBWRReactorVesselAssemblyThereactorvesselassembly,shownonpage3-4,consistsofther

6、eactorvesselanditsinternalcomponents,includingthecoresupportstructures,coreshroud,moistureremovalequipment,andjetpumpassemblies.Thepurposesofthereactorvesselassemblyareto:•Housethereactorcore,•Serveaspartofthereactorcoolantpressureboundary,•Supportandalignthefuelandcontrolrods,•Provideaflo

7、wpathforcirculationofcoolantpastthefuel,•Removemoisturefromthesteamexitingthecore,and•Providearefloodablevolumeforalossofcoolantaccident.Thereactorvesselisverticallymountedwithinthedrywellandconsistsofacylindricalshellwithanintegralroundedbottomhead.Thetophead