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熔融堆芯
相关语句
  core moltening
     Calculation of Concrete Ablation and Decomposition due to Concrete Being Heated During the Core Moltening
     熔融堆芯过程中混凝土热分解融化计算
短句来源
  相似匹配句对
     Calculation of Concrete Ablation and Decomposition due to Concrete Being Heated During the Core Moltening
     熔融堆芯过程中混凝土热分解融化计算
短句来源
     MELT SPINNING OF POLYVINYLALCOHOL
     聚乙烯醇的熔融纺丝
短句来源
     MOLTEN TYPES OF TEMPERATU-RE-INDICATING PAINTS
     熔融型示温涂料
短句来源
     Radial and axial failure mode of fuel and cladding are simulated;
     对堆芯熔融过程中包壳和燃料栅元的径向和轴向分段失效模式进行了模拟;
短句来源
     PLASMA BURNING AND CONTROL IN REACTOR CORE
     堆芯等离子体燃烧和控制
短句来源
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The potential causes and the risk of steam explosion are indicated through a brief discussion on the processes of the severe accidents at the nuclear power plants in the TMI in USA and the Chernobyl in former Soviet Union. The major research issues on the steam explosion and relevant thermal physical phenomena induced by the interaction between the melted reactor core and coolant under certain conditions are as well as the universal numerical computational principles of the multiple phase flows of the JASMINE-pro...

The potential causes and the risk of steam explosion are indicated through a brief discussion on the processes of the severe accidents at the nuclear power plants in the TMI in USA and the Chernobyl in former Soviet Union. The major research issues on the steam explosion and relevant thermal physical phenomena induced by the interaction between the melted reactor core and coolant under certain conditions are as well as the universal numerical computational principles of the multiple phase flows of the JASMINE-pro software developed by the author are introduced in this paper.

本文简要介绍美国三哩岛核电站堆芯熔化事故和前苏联切尔诺贝利核电站堆芯解体事故两类核电站严重事故所对应的事故历程,指出发生蒸汽爆炸潜因及其风险,熔融堆芯-冷却剂相互作用在一定条件下引起蒸汽的爆炸所涉及的主要热物理研究内容和作者开发的JASMINE-pro多相流泛用数值计算程序原理。

In this study,the full-range Station Black-out accident scenario for QINSHAN phase II 3&4 Unit NPP is performed and analyzed by application of MELCOR code(1.8.5).Effect of mitigative measures such as primary circuit depressurization,passive hydrogen recombination,their influence on evolution of accident phenomena were compared in the calculation analysis.Radial and axial failure mode of fuel and cladding are simulated;Also axial and radial ablation trends of cavity,induced by MCCI were quantitively determined;For...

In this study,the full-range Station Black-out accident scenario for QINSHAN phase II 3&4 Unit NPP is performed and analyzed by application of MELCOR code(1.8.5).Effect of mitigative measures such as primary circuit depressurization,passive hydrogen recombination,their influence on evolution of accident phenomena were compared in the calculation analysis.Radial and axial failure mode of fuel and cladding are simulated;Also axial and radial ablation trends of cavity,induced by MCCI were quantitively determined;For the late phase of scenario,production,distribution of hydrogen and its recombination by PAR system were evaluated and analyzed.The results indicate that timely depressurization of primary circuit by execution of pressurizer extended function can delay both core collapse and meltthrough of RPV for about 5 hrs,as well as eliminate the risk of early radioactive release through SG U-tube to the environment;Solution 3_C indicates the 10 PARs have successfully recombined 667 kg of hydrogen within 24 hrs.As a result,maximum hydrogen concentration is as low as 3.12%,pressure inside the containment accumulates to about 0.4 MPa.

应用新版的MELCOR程序,以600 MW机组为对象,进行了SBO严重事故进程研究,在严重事故计算分析中比较了稳压器功能延伸、非能动氢气复合等缓解措施(3个方案)对严重事故进程和现象的影响。对堆芯熔融过程中包壳和燃料栅元的径向和轴向分段失效模式进行了模拟;计算了熔融堆芯和堆坑混凝土的相互作用(MCCI)引起的堆坑径向和轴向熔蚀的情况;对事故中后期可燃气体的产生、分布及非能动氢气复合系统在安全壳中对氢气的复合效应进行了评价和分析。分析结果表明,事故下稳压器延伸功能的及时投入,可使堆芯整体坍塌失效及压力容器熔穿均延后了近5 h,同时也降低了通过蒸汽发生器(SG)U型管向二次侧及环境早期释放放射性的风险。方案3_C表明10台氢气复合器在24 h内有效地复合了667 kg氢气,安全壳大空间最大氢气摩尔浓度为3.12%,安全壳内压力约为0.4 MPa。

 
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