MSHIM机制下轴向偏移控制的设计改进

The design amendment of axial offset control under MSHIM mechanisam

机械补偿控制是一种先进的控制反应堆功率及轴向功率偏移的技术。由于功率控制系统和轴向偏移为两个独立的系统,为了避免不利的核峰值因子,最大限度减少功率和轴向偏移控制系统之间的互相干扰,业界普遍采用功率控制系统具有优先权的策略。基于对该策略的目的及实施方法的研究,提出一种改进方案。基于对安全相关影响、可实施性及性能的分析表明该改进能以极小的代价提高控制系统的时间响应特性,具有较高的实施价值。

Mechanical shim is an advanced technology for reactor power control and axial offset control. Due to two independent control systems,to avoid possible unacceptable nuclear peaking factor and minimize the potential interactions between power control system and axial offset control system,a policy of having the power control system equipped with higher moving priority is popular deployed.Based on research of intention of the policy and control strategy,a refined design is proposed. The analysis in perspective of safety issues and applicability and performance,indicates the refinement brings faster response for the system with minor cost and has high deployment value.