介绍了核电厂事故后主控制室室内CO_2浓度的设计目标。利用质量平衡关系建立了CO_2浓度的控制方程,并根据计算结果找出计算场景中CO_2浓度的影响因素。同时,针对每个影响因素逐一设计计算场景,通过计算和分析,总结变量之间的规律。根据计算和分析结果引出CO_2浓度极限值的概念,为工程计算提供参考。 The design goal of CO 2 concentration in main control room after nuclear accident is introduced. The governing equation of CO 2 concentration was established by using the mass balance relationship, and the influencing factors for calculating CO 2 concentration in the scene were found out based on the calculated results. At the same time, we design the computing scenarios for each of the influencing factors one by one, through the calculation and analysis, summarize the law between the variables. Based on the results of calculation and analysis, the concept of CO 2 concentration limit is derived, which provides a reference for engineering calculation.