Study on Core Control Strategy for Initial Cycle Utilizing Gadolinium Burnable Poisons
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摘要: 在MODE-G控制模式的基础上,针对首循环含钆堆芯轴向功率分布的显著特点,对堆芯控制模式进行了改进。通过松弛轴向偏移控制策略(RAOC)将轴向偏移(AO)控制在一个带状区域内;应用改进后的控制模式对首循环含钆堆芯典型燃耗步进行了负荷跟踪模拟;并针对控制模式的改进特点,选择弹棒事故进行了初步事故中子学参数评价。结果表明,改进后的堆芯控制模式相对于MODE-G控制模式能更有效地加强对堆芯轴向功率分布的控制。Abstract: Based on the present MODE-G control strategy,an improved new core control strategy is developed for the initial cycle utilizing gadolinium burnable poisons.With the relaxed axial offset control(RAOC) procedure to limit the core axial offset(AO) in a band region,load follow operations are simulated under the improved core control strategy and the simulation results are compared with those obtained using MODE-G control strategy.Additionally,a preliminary evaluation of the impact of the an ejected rod with the improved core control strategy is performed.It is shown that the improved core control strategy can control the core axial power distribution more satisfactorily and effectively.
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Key words:
- Initial Cycle /
- Gadolinium /
- Control Strategy /
- Axial Power Distribution
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