堆芯热工设计对提高反应堆装置的热效率和保证反应堆安全运行十分重要。为了保证反应堆安全运行,根据有关安全法规、导则和标准提出了热工设计限值。主要热工参数设计限值有:在运行状态下冷却剂最高温度低于运行压力下的沸点,燃料棒包壳热点温度不超过700℃,燃料芯体热点温度低 Reactor thermal design is very important to improve the thermal efficiency of reactor and to ensure the safe operation of the reactor. In order to ensure the safe operation of the reactor, thermal design limits are proposed in accordance with the relevant safety regulations, guidelines and standards. The main thermal parameters of the design limits are: the maximum coolant temperature in the operating state below the operating pressure of the boiling point, fuel rod cladding hot temperature does not exceed 700 ℃, the fuel core hot spot temperature is low