多模式机械补偿运行特性研究

经济、灵活及高自动化的运行控制策略是先进核电厂的设计目标之一。为适应这一发展趋势，近年来国际上提出了机械补偿运行控制的设计理念。机械补偿是一种主要通过控制棒的移动补偿堆芯反应性变化和控制轴向功率分布的先进控制策略。本文分别在基本负荷、负荷跟踪及启动/再启动运行模式下对机械补偿运行特性进行了研究。研究表明：机械补偿能自动实现堆芯的有效控制，并使功率峰因子保持在较低水平，是一种灵活、有效、经济的运行控制策略。此外，针对机械补偿运行对核电厂设计的影响进行了初步分析。

Research of Multi-mode Mechanical Shim Operation Character

An economic, flexible and automated operation and control strategy is the design objective of the advanced nuclear power plant. Adapting to this trend of development, the mechanical shim has been proposed recently. The mechanical shim is an advanced control strategy, which controls core reactivity and axial power distribution offsets by moving control rods. This paper studied the operation characters of mechanical shim in baseload, load following and startup/restart operation modes. The result shows that the mechanical shim can control the core automatically and keep the power peaking factors low in all operation modes, thus the mechanical shim is a flexible, effective and economic operation strategy. Moreover, the effect of mechanical shim on the nuclear power plant design was analyzed.