文章编号：0258-0926(2023)02-0030-07;DOI:10.13832/j.jnpe.2023.02.0030压水堆高保真换料循环计算功能开发与验证应用王习宁，刘宙宇*，周欣宇，温兴坚，曹璐，张思凡，许晓北，易思宇，李帅铮，李帆，苏鑫西安交通大学核科学与技术系，西安，710049摘要：在自主开发的数值反应堆物理计算程序NECP-X基础上开发了压水堆的换料循环计算功能，并针对某M310机组首循环、第2循环和第3循环的启动物理实验，以及针对前2个循环的燃耗进行了精细建模计算。计算值与实测值的比较结果表明：首循环、第2循环和第3循环启动物理实验的临界硼浓度、控制棒价值、温度系数计算结果误差均较小，符合验收准则；不同燃耗深度下的临界硼浓度、堆芯功率分布与实测值的比较结果显示，稳定燃耗点处最大硼浓度偏差为−39ppm（1ppm=10−6），最大的组件功率误差小于4.5%，随着燃耗的加深，堆芯功率的分布逐渐展平，误差逐渐减小。计算结果表明NECP-X程序已经具备商用压水堆启动物理实验和多燃料循环的计算能力。关键词：数值反应堆；NECP-X；多循环换料；大型压水堆验证中图分类号：TL326文献标志码：ADevelopmentandValidatedApplicationofCalculationFunctionofHighFidelityRefuelingCycleforPressurizedWaterReactorWangXining,LiuZhouyu*,ZhouXinyu,WenXingjian,CaoLu,ZhangSifan,XuXiaobei,YiSiyu,LiShuaizheng,LiFan,SuXinDepartmentofNuclearScienceandTechnology,Xi’anJiaotongUniversity,Xi’an,710049,ChinaAbstract:Therefuelingcyclecalculationfunctionforpressurizedwaterreactor(PWR)isdevelopedonthebasisoftheself-developednumericalnuclearreactorphysicscalculationcodeNECP-X.Startupphysicsexperimentsareconductedforthefirst,secondandthirdcyclesofanM310reactor,andfinemodelingcalculationiscarriedoutforthefirsttwocycles.Bycomparingthecalculatedvalueswiththemeasuredvalues,itshowsthattheerrorsofcalculationresultsofcriticalboronconcentration,controlrodworthandtemperaturecoefficientinthestartupphysicsexperimentsforthefirst,secondandthirdcyclesarerelativelysmall,whichmeettheacceptancecriteria.Theresultsofcomparisonofthecriticalboronconcentrationandcorepowerdistributionwiththemeasuredvaluesatdifferentburnuplevelsshowthatthemaximumboronconcentrationdeviationatthestableburnuppointis−39ppm(1ppm=10−6),an...
