Nuclear power plant is completely independent of air and has high power density, which improves unmanned marine vehicle maneuvering performance, maximum speed, and concealment. The supercritical carbon dioxide-cooled reactor system that has the advantages of compact system and high cycle efficiency is a promising energy conversion system candidate for generation IV reactors. However, due to the dramatic variations of supercritical fluid thermophysical properties, the operation of supercritical carbon dioxide-cooled reactor system is complex and it is difficult to control it. In this article, a mathematical model of supercritical carbon dioxide-cooled reactor system was established using the modified RELAP5 code, and two traditional coordination control schemes were used to study the system operation characteristics under load drop transient condition. Each key system parameter response characteristics was investigated. Finally, based on the research results, an optimized operation scheme that was proved to have better system control effect was proposed.

中文翻译：

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协调控制方案下超临界二氧化碳冷却反应堆系统运行特性

核电站完全独立于空气，功率密度高，提高了无人船的机动性能、最大速度和隐蔽性。超临界二氧化碳冷却反应堆系统具有系统紧凑、循环效率高等优点，是第四代反应堆很有前景的能量转换系统候选。然而，由于超临界流体热物理性质的剧烈变化，超临界二氧化碳冷却反应器系统的运行复杂且难以控制。在本文中，使用修改后的 RELAP5 代码建立了超临界二氧化碳冷却反应堆系统的数学模型，并利用两种传统的协调控制方案研究了负载跌落瞬态条件下的系统运行特性。研究了每个关键系统参数的响应特性。最后，基于研究结果，提出了一种经验证具有较好系统控制效果的优化运行方案。