05 Reactor Kinetics and Operation Rev 0

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1、LecturesonAppliedReactorTechnologyandNuclearPowerSafetyLectureNo5Title:ReactorKineticsandReactorOperationHenrykAnglartNuclearReactorTechnologyDivisionDepartmentofEnergyTechnologyKTHSpring2005AppliedReactorTechnologyandHenrykAnglartNuclearPowerSafety-Lecture5NuclearReactorTech

2、nologyDivisionSlideNo1DepartmentofEnergyTechnology,KTHOutlineoftheLecture(1)•ReactorKinetics–ReactorPeriod–EffectiveDelayedNeutronFraction–EffectiveDelayedNeutronPrecursorDecayConstant–PromptCriticality–StablePeriodEquation–ReactorStartupRate(SUR)–DoublingTimeAppliedReactorTe

3、chnologyandHenrykAnglartNuclearPowerSafety-Lecture5NuclearReactorTechnologyDivisionSlideNo2DepartmentofEnergyTechnology,KTHOutlineoftheLecture(2)•ReactorOperation–Startup–EstimatedCriticalPosition–CorePowerDistribution–PowerTilt–ShutdownMargin–Operation–Temperature–Pressure–P

4、owerLevel–Flow–CoreBurnup–Shutdown–DecayheatAppliedReactorTechnologyandHenrykAnglartNuclearPowerSafety-Lecture5NuclearReactorTechnologyDivisionSlideNo3DepartmentofEnergyTechnology,KTHReactorPeriod(1)•Thereactorperiodisdefinedasthetimerequiredforreactorpowertochangebyafactorof

5、"e,"where"e"isthebaseofthenaturallogarithmandisequaltoabout2.718•Thereactorperiodisusuallyexpressedinunitsofseconds•Fromthedefinitionofreactorperiod,itispossibletodeveloptherelationshipbetweenreactorpowerandreactorperiodthatisexpressedbythefollowingEquation:P=Pet/τ,hereτisthe

6、reactorperiod0AppliedReactorTechnologyandHenrykAnglartNuclearPowerSafety-Lecture5NuclearReactorTechnologyDivisionSlideNo4DepartmentofEnergyTechnology,KTHReactorPeriod(2)•Thesmallerthevalueofτ,themorerapidthechangeinreactorpower•Ifthereactorperiodispositive,reactorpowerisincre

7、asing•Ifthereactorperiodisnegative,reactorpowerisdecreasingAppliedReactorTechnologyandHenrykAnglartNuclearPowerSafety-Lecture5NuclearReactorTechnologyDivisionSlideNo5DepartmentofEnergyTechnology,KTHReactorPeriod(3)•Therearenumerousequationsusedtoexpressreactorperiod,butEquati

8、onshownbelow,orportionsofit,willbeusefulinmostsituations*l=promptgen