【摘要】 针对中国先进研究堆(CARR)的具体结构以及自然循环建立的过程中冷却剂流动会发生逆转的特点,开发了自然循环瞬态计算程序.程序对CARR的低压运行系统以及自然循环建立过程中可能出现的流动状态以及换热形式进行了充分考虑.根据微分方程组刚性的强弱,计算中交替使用 Adams预测 校正法和Gear方法进行数值求解.通过计算发现:应急冷却系统的投入明显地降低了 CARR的冷却剂温度以及其他热工参数,更加有效地保证了 CARR 的安全运行.本程序可以作为 CARR 热工安全分析工具,并可为CARR停堆后各设备的运行方案提供理论分析基础.更多还原

【Abstract】 In our research, a transient analysis code was developed to calculate the thermalhydraulic behaviors of China advanced research reactor(CARR). The detailed structure of CARR and the fluid flow direction inverse during the process of natural circulation establishment were considered. Moreover, the flow patterns and heat transfer conditions were taking into account. In addition, Gear method and Adams predictorcorrector method were adopted separately for a better solution to the stiff differential equations. Some important parameters such as pressure, flow rate and temperature for the mean channel and hot channel were obtained. Our research result show that the used of emergency cooling system obviously reduced the peak operational temperature to ensure the safe operation of CARR more effectively.更多还原