摘要
福岛核电站事故后,同时随着国内外三代核电技术的发展,国内自主研发的“华龙一号”堆型成为国内核电发展的重要革新之路。应急给水系统为重要专设安全系统之一,在事故后缓解事故后果,将核电站带到安全状态起着至关重要的作用。通过单一故障准则分析识别出“华龙一号”应急给水系统在事故缓解中最恶劣的运行工况,并通过FLOWMASTER热工水力软件对该系统方案的设计和运行工况进行了数值验证,对系统关键参数进行了敏感性分析。分析结论表明:“华龙一号”的应急给水系统方案满足三代核电机组的安全要求;限流孔板孔径和给水流量呈线性变化的关系,“华龙一号”机组适用的孔板孔径为17.0~20.0 mm;“华龙一号”机组适用的调节阀小档开度区间为30%~45%,以及在调节阀同步调节时的流量调节敏感区域为0~50%,不同步调节时的流量调节敏感区域为20%~60%。
After the Fukushima accident,and with the development of third generation nuclear power technology at home and abroad,the HPR1000,which owns all the intellectual properties,is becoming the milestone during the innovation route of domestic nuclear power industry.As one of the most important engineered safety systems,Emergency Feedwater System plays a vital role in mitigating the consequences of accidents during Design Base Conditions.The worst operating conditions of the system during DBC accidents are identified base on the single failure criterion,the design and numerical validations of the system scheme are carried out by FLOWMASTER.Finally,the sensitivity analysis of the orifice diameter and control valve’s opening are studied.The investigations show that the scheme of the Emergency Feedwater System is met the requirements of the third generation NPP.This work also shows that the relationship between feedwater flowrate and orifice diameter is linear,the applicable sizes of the orifice diameter are 17.0 mm to 20.0 mm,the suitable range for small-step opening of the control valves is 30%to 45%,and the sensitive region of the flowrate regulating are 0~50%and 20%~60%respectively,depending on whether the control valves are synchronized controlled or not.
作者
盛美玲
丘锦萌
王小希
刘妍
于凤云
SHENG Meiling;QIU Jinmeng;WANG Xiaoxi;LIU Yan;YU Fengyun(Hualong Pressurized Water Reactor Technology Corporation,Ltd.,Process and Layout Department,Beijing 100036,China)
出处
《核科学与工程》
CAS
CSCD
北大核心
2019年第6期885-893,共9页
Nuclear Science and Engineering
关键词
“华龙一号”
应急给水系统
单一故障准则
热工水力分析
孔板孔径
小档开度
HPR1000
Emergency feedwater system
Single failure criterion
Thermal hydraulic analysis
Orifice diameter
Small-step opening
