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| 1 | 西安脉冲堆燃耗对反应性引入瞬态行为的影响研究显示文摘研究了一种精确模拟反应堆燃耗相关瞬态行为的新方法。基于三维物理热工耦合的堆芯瞬态计算程序,与采用微观燃耗的三维精确燃耗计算程序相耦合,针对西安脉冲堆控制棒移动过程,分析了不同燃耗深度下由于反应性引入的不同形式和大小而引起的堆芯功率和燃料温度等参数的瞬态特性。进行了堆芯脉冲功率响应对反应性引入量的敏感性分析,研究了堆芯动态参数的变化机理。数值结果表明:随着燃耗的加深,脉冲堆芯布置时脉冲功率有减小的趋势,而堆芯稳态布置时脉冲功率明显增大,达到脉冲功率峰值的时间有所提前。 | 张信一 王立鹏 王永平 江新标 银华北 何彬 李达 张良 姜夺玉 胡田亮 | 2023 | 核动力工程2023，44，5： | 0 |
| 2 | Investigating core axial power distribution with multiconcentration gadolinium in PWR显示文摘Core axial power distribution is an essential topic in pressurized water reactor(PWR)reactivity control.Traditional PWRs limit stability against axial core power oscillations at a high-cycle burnup.Because the‘‘camel’’peak power shape typically occurs with increasing depletion,the approaches used for the axial power control deserve special attention.This study aims to investigate the performance of different gadolinium rod design schemes in core axial power control during power operation based on the reactivity balance strategy,and to propose new multiconcentration gadolinium rod design schemes.In the new design schemes,low-concentration gadolinium pellets are filled in the axial hump part of the gadolinium rod,and high-concentration gadolinium pellets are filled in the other parts.The impact of different gadolinium rod design schemes on the main core characteristics was evaluated using the nuclear design code package PCM developed by CGN.The results show that the new gadolinium rod design significantly impacts the core axial power shape.The new design schemes can efficiently improve the core axial power distribution along the entire cycle by reducing the core axial power peak at the end of a cycle,enhancing the reactor operation stability,and achieving a better core safety margin,revealing a sizeable potential application. | Jing-Gang Li Jing-Han Peng Chao Wang Jun Chen Fei Xu Yun-Fan Ma | 2022 | Nuclear Science and Techniques2022，33，11： | 0 |
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