静止和摇摆条件下浮动式核电站一二回路PRHRS特性分析  

Performance Analysis of PRHRS in Primary and Secondary Circuits for OFNP under Static and Rolling Conditions

作　　者：马翊超 尹莎莎 章静[1] 田文喜[1] 秋穗正[1] 苏光辉[1] MA Yichao;YIN Shasha;ZHANG Jing;TIAN Wenxi;QIU Suizheng;SU Guanghui(School of Nuclear Science and Technology,Xi’an Jiaotong University,Xi’an 710049,China;Nuclear Power Institute of China,Chengdu 610041,China)

机构地区：[1]西安交通大学核科学与技术学院,陕西西安710049 [2]中国核动力研究设计院,四川成都610041

出　　处：《原子能科学技术》2022年第6期1085-1093,共9页Atomic Energy Science and Technology

基　　金：中核集团“青年英才”项目。

摘　　要：浮动式核电站长期在海洋环境中运行,各系统都会受到海洋运动条件的影响。非能动余热排出系统(PRHRS)可在核电站发生全厂断电事故的情况下带出堆芯衰变余热,防止堆芯熔化,是重要的反应堆辅助系统。本文以一种采用海水作为最终热阱的浮动式核电站作为研究对象,分别设计了一回路和二回路PRHRS,开展了静止和摇摆条件下反应堆系统发生全厂断电事故的计算,对两种PRHRS在静止和摇摆条件下的运行特性进行了分析。研究表明,静止条件二回路PRHRS具有更强的带热能力,摇摆条件下一回路PRHRS的带热能力更加稳定。As offshore floating nuclear plant(OFNP)operates in the marine environment for a long time,all systems will be affected by the ocean motion conditions.Therefore,it is necessary to consider the influence of ocean motion conditions in the design,operation and accident safety analysis of OFNP.Station blackout(SBO)accident has been an essential part of nuclear power plant accident safety analysis after the Fukushima nuclear accident and necessary safety systems must be established in nuclear power plant to mitigate or delay fuel degradation during SBO accident.The passive residual heat removal system(PRHRS)is an important auxiliary system in nuclear power plant,which can bring out the residual heat and prevent the core melting after the SBO accident.However,current researches focus on the following aspects:1)the development of system analysis code suitable for ocean motion conditions;2)the analysis of natural circulation characteristics under ocean motion conditions;3)the computation and analysis of single kind of PRHRS operation characteristics.While little research work has been carried out to compare the performance of PRHRS in primary and secondary circuits under static and motion conditions.In this paper,a system analysis code applicable to OFNP was developed by adding motion condition model to existing code and validated by comparing to experimental data,furthermore an OFNP system model with PRHRS in primary and secondary circuits was established and SBO accident simulation and safety analysis were conducted under static and rolling conditions with PRHRS in primary and secondary circuits operating respectively to compare the performance of the two PRHRS.The results show that the modified code shows great accuracy and feasibility by conducting simulation of a two-loop single phase circulation system and comparison of simulation results and experimental data.The heat removal capability of PRHRS in secondary circuit is better than that in primary circuit under static condition while both of the two PRHRS can effec

关 键 词：非能动余热排出系统 浮动式核电站 摇摆条件 全厂断电事故 

分 类 号：TL331[核科学技术—核技术及应用]