秦山核电厂320MW机组夏季运行方式的季节性调整

Seasonal adjustments of operation mode in summer for Qinshan 320MW NPP

在秦山核电厂320MW机组的热力循环中,存在很多发热源,其热量不能被系统完全利用,最终需要通过大气或海水进行散热冷却。所以在设计上根据秦山核电厂的气象、水文等条件,以大气和海水的基础环境温度作为冷却系统的设计基准,考虑了相关散热措施并且设计有冗余设备。但在运行实践中发现夏季环境温度会高于设计温度,造成部分系统参数偏离规程要求。通过对系统设计及运行方式的分析,结合实际环境温度变化,总结夏季高温天气对系统运行带来的挑战,识别系统设计局限,明确季节性转换调整运行方式的方法,并提出应对建议。

In thermodynamic cycle of Qinshan 320MW NPP, there are a lot of heat source. The heat cannot be fully used by system,which will eventually be cooled by air or seawater. So according to the meteorological and hydrologicalconditions of Qinshan 320MW NPP, the basis temperatureof atmosphere and seawaterwas chosen as a design basis of the cooling system considering the relevant cooling measures and redundant equipments were designed.But actually the environmental temperature in summer is higher than the design basis, and some system parametersdeviate from the requirements of regulation.Through the analysis of the system design and operation mode, combined with the actual environmental temperature change, problems of system caused by hot weather were summed up. Also the limitations of system design were recognized. As a result, seasonal adjustment method of operation mode and some other suggestions were given.