华龙一号反应堆177堆芯核设计
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摘要
华龙一号(HPR1000)反应堆是我国具有自主知识产权的三代核电压水堆堆型。其堆芯由177个燃料组件组成,不仅具有较高的堆芯输出功率,而且具有较低的线功率密度使其具备较高的安全裕量。HPR1000反应堆平衡循环采用18个月换料策略,核电厂可利用率超过90%。采用IN-OUT换料方式,平均批卸料燃耗大于45000MW·d/t(U)。堆芯具有很好的反应性负反馈固有特性,仸何运行状态下的慢化剂和燃料温度效应均为负值。HPR1000反应堆采用2套独立的停堆系统,紧急停堆情况下即使1束最大价值的控制棒被卡在堆外,反应堆也能被快速有效地带入到停堆状态幵保证足够的停堆裕量。HPR1000反应堆采用了机动性较好的Mode-G运行方式,基于Mode-G运行方式,HPR1000可以迚行负荷跟踪、负荷阶跃等机动运行。同时采用了在线监测系统,可以实时监测反应堆运行过程中的三维堆芯功率分布。
HPR1000 is the third generation PWR with its intellectual property owned by China. The core consists of 177 fuel assemblies which can not only improve the power output but also appropriately reduce the linear power density to ensure the safety margin. The 18 month refueling strategy is adopted for HPR1000 equilibrium cycles and a plant availability factor of more than 90% can be achieved. HPR1000 uses the IN-OUT reload manner and the batch average discharged burnup is deeper than 45000 MW·d/t(U). In any operation condition, the temperature coefficient for the moderator and the fuel are both negative, and thus the core has a good inherent negative feedback characteristic. HPR1000 has two independent shutdown systems. The reactor can be immediately and effectively brought to shutdown state and enough shutdown margin can be maintained in any emergence condition even though a control rod with greatest worth is stuck out of the core. The Mode-G operation strategy with good operation flexibility is adopted for HPR1000. With Mode-G, HPR1000 can perform flexible operation, such as load following and load step. The power online monitoring system is equipped to monitor the 3D power distribution during operation.
HPR1000 is the third generation PWR with its intellectual property owned by China. The core consists of 177 fuel assemblies which can not only improve the power output but also appropriately reduce the linear power density to ensure the safety margin. The 18 month refueling strategy is adopted for HPR1000 equilibrium cycles and a plant availability factor of more than 90% can be achieved. HPR1000 uses the IN-OUT reload manner and the batch average discharged burnup is deeper than 45000 MW·d/t(U). In any operation condition, the temperature coefficient for the moderator and the fuel are both negative, and thus the core has a good inherent negative feedback characteristic. HPR1000 has two independent shutdown systems. The reactor can be immediately and effectively brought to shutdown state and enough shutdown margin can be maintained in any emergence condition even though a control rod with greatest worth is stuck out of the core. The Mode-G operation strategy with good operation flexibility is adopted for HPR1000. With Mode-G, HPR1000 can perform flexible operation, such as load following and load step. The power online monitoring system is equipped to monitor the 3D power distribution during operation.
引文
[1]RAUCK S.Science V2 nuclear code package:qualification report:technical report,NFPSD DC 89[R].Garching,France:Framatome ANP,2004.
[2]王诗倩.百万千瓦级压水堆堆芯氙稳定性分析[J].核动力工程,2015,36(S2):24-26.
[2]王诗倩.百万千瓦级压水堆堆芯氙稳定性分析[J].核动力工程,2015,36(S2):24-26.