Reactor Startup Characteristics of Heat Pipe Cooled Reactor with Multiple Feedback Mechanism
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摘要: 热管堆采用高温固态堆芯，启堆过程中会经历较大的温升和热膨胀，热管中的工质状态会发生变化，带来复杂的反应性反馈。为研究热管堆反馈机制下的启堆特性，以美国洛斯阿拉莫斯国家实验室（LANL）设计的兆瓦级热管堆MegaPower为研究对象，利用热管堆瞬态分析程序HPRTRAN，采用3种启堆模式对其进行了启堆工况计算，研究了每种模式下的启堆特性。结果表明，热管堆启堆过程中会经历较大的功率波动，可能出现不利于启堆的“温度平台”，间隔转动控制鼓相比于连续转动控制鼓，是一种更安全且实际可行的启堆方案。Abstract: The heat pipe-cooled reactor (HPR) has a high temperature solid core, so during the startup, it will experience large temperature rise and thermal expansion. Besides, the state of working fluid in the heat pipe will change, which would bring complex reactivity feedback. In order to study the startup characteristics of HPR under feedback mechanism, taking the megawatt HPR MegaPower designed by Los Alamos National Laboratory (LANL) as the research object, using the HPR transient analysis code HPRTRAN, the startup conditions of MegaPower are calculated with three startup modes, and the startup characteristics of each mode are studied. The results show that, relatively large power fluctuation occurs during the startup process of HPR, there may be a "temperature platform" that is not conducive to the startup, and that rotating control drum at intervals is a safer and more practical startup scheme than rotating control drum continuously.
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图 4 MegaPower控制鼓价值曲线与微分价值
Figure 4. Value Curve and Differential Value of Control Drum of MegaPower
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