功率运行下主蒸汽安全阀定值校验的安全分析与对策研究

上海交通大学硕士学位论文功率运行下主蒸汽安全阀定值校验的安全分析与对策研究姓名：阮良成申请学位级别：硕士专业：核能与核技术工程指导教师：程旭;俞忠德20071101SAFETYANALYSISANDCOUNTERMEASURERESERCHONVERIFICATIONTESTOFTHECALIBRATIONPRESSUREOFMAINSTEAMSAFETYVALVESDURINGPOWEROPERATIONABSTRACTItcanreducesthecriticalpathtimeofrefuelingoutagethatverificationtestsofthecalibrationpressureofmainsteamsafetyvalvesarescheduledtobeperformedatpoweroperationstatefromhotshutdownstatejustafterdisconnectingwiththegridoftheunit,anditcanassureswellcertaintyoftheoutageschedule.Reactorreactivitybalancecalculationandsystems’operationsshowedthatitwasfeasibleperformingverificationtestofthecalibrationpressureofmainsteamsafetyvalveunder83%FPpoweroperationattheendoflife.SafetyinjectionactuationtestwasperformedatFull-scaleSimulatorofQinshanNPP,theinitialconditionforthetestwassameasonefortheSIactuationtestofUnit1duringcommissioning.SIsignalwastriggeredbylow-lowsteampressurethroughopeningthesteamdumpvalvestoatmosphere.ComparingtheresultsobtainedfromthesimulatorandrealdatafromthecommissioningofUnit1showedthattheresultsfromthesimulatorweremoreconservativefromviewpointsofsafety,sothemodelsandparametersforthesimulatorwerecredible.OnemainsteamsafetyvalvewasopenedspuriouslyatFull-scaleSimulator,evolutionofkeyparametersofnuclearsteamsupplysystemafterspuriousopeningwasobserved.Theresultsfromthesimulatorshowedthatitwasfeasibletoperformverificationtestsofthecalibrationpressureofmainsteamsafetyvalvesat81%FPpowerlevel.Afterspuriousfullopeningofthesafetyvalve,underallrelatedcontrolsystemsbeingkeptinnormaloperation,thereactorpowerincreasedabout9.6%FP,reactorprotectionsystemandturbineprotectionsystemdidn’tactuate,thentheunitkeptpoweroperation.Accordingtotherelationbetweenflow-rateanddifferentialpressuredumpingflow-rateofmainsteamsafetyvalveunderthetestpressurewerededucedfromthecharacteristicsofmainsteamsafetyvalve,thentheresultsfromthesimulatorwereverified.Astospuriousopeningandgettingstuckofmainsteamsafetyvalve,somecountermeasuresaremade;keyoperationsforaccidentprocessingandkeypointsofoutagescheduleregulatingaregiven.ThroughcomparativeAnalysisonsimulatortests,precautionsforverificationtestsofthecalibrationpressureofmainsteamsafetyvalvearepresented,increasingthelevelsofsteamgeneratorsandpressurizercanprolongtheSIactuationtimegreatly.Finally,schedulingandprecautionsforverificationtestsofthecalibrationpressureofmainsteamsafetyvalveunder83%FPpowerlevelaregiven.KEYWORDS:nuclearpowerplant,refuelingoutage,mainsteamsafetyvalve,verificationofthecalibrationpressure,safetyanalysisIII11.11.221.332.1RPERISRIS1RRARRA2RISRCV2RPERISRRAfig1schematicdiagramofnuclearsteamsupplysystemforQinshan42.25fig2ConfigurationofmainsteamsafetyvalvesforQinshan2.3VVP119VV116VV113VV110VV107VV104VV101VVGCT133VVGCT135VVGCT134VVGCT132VVVVP002VVVVP001VVVVP118VV115VV112VV109VV106VV103VV100VVSG1SG2SG11SG22VVPGCTVV6?2.4783.183%FP9fig3Corereactivityafterreactorpowerdecreasing3.23.310114.14.24.2.1124.2.24.2.2.11[18-21]fig4SGpressureandnarrowrangelevelforSItestduringcommissioningofUnit113fig5LooptemperaturesoftheMainPrimarySystemforSItestduringcommissioningofUnit14.2.2.214fig6Comparisonofmainsteampressure15fig7ComparisonofLoop1temperatureofreactorcoolantsystem16fig8Comparisonofpressurizerpressureandlevel17fig9ComparisonoflevelofNo1steamgeneratoraffected4.2.34.3184.3.119fig10mainsteamflow-rateandpressureafterspuriousopeningofmainsteamsafetyvalve4.3.220fig11Reactornuclearpowerandgeneratorelectricpowerafterspuriousopeningofmainsteamsafetyvalve4.3.34.3.4214.4pkqmΔ=rmqkrpΔ225.15.1.12324255.1.24265/h1020.53140.25155A0A2.1334.755.2275.2.15.2.2286/MPa15.4/m0.55-2.9mRCP1/286.0RCP1/285.4RCP2/286.0RCP2/285.1SG1/MPa6.77SG2/MPa6.72SG1/m1.48-0.64mSG2/m1.50-0.64mSG1/t/h18.8SG2/t/h17.8SG/t/h029fig12mainsteampressureofNo1andNo2steamgeneratorfig13Narrowrangelevelandauxiliaryfeedwaterflow-rateofNo1steamgenerator30fig14Loop1temperatureofreactorcoolantsystemfig15Pressurizerpressureandlevel5.2.331326.16.23334353637138113911401141114212432244224522462247234833493350335133523453445444554556555755859功率运行下主蒸汽安全阀定值校验的安全分析与对策研究作者：阮良成学位授予单位：上海交通大学本文链接：授权使用：上海海事大学(wflshyxy)，授权号：0383f315-378a-4ed1-99ad-9de300c96bc7下载时间：2010年8月31日