广东大亚湾核电站厂用电力系统可靠性分析

RELIABILITY ANALYSIS FOR THE ELECTRIC POWER SYSTEM OF GUANGDONG NUCLEAR POWER PLANT

运用故障树分析方法，对广东大亚湾核电站（ＧＮＰＰ）厂用电力系统的可靠性作了分析。建造了电力系统６．６ｋＶ交流应急母线（ＬＨＡ）、２２０Ｖ交流不间断电源母线（ＬＮＥ）和１２５Ｖ直流电源母线（ＬＢＡ）的失电故障树。利用ＳＥＴＳ程序及法国标准９００ＭＷ压水堆核电站２００堆·年运行经验反馈的可靠性数据，对电力系统的可靠性作了定性、定量分析。给出了电力系统故障树支配性最小割集和顶事件的发生概率，并对支配性最小割集作了描述和分析。

A reliability analysis for the electric power system of Guangdong nuclear power plant is made based on the system fault tree approach. Three kinds of top event in the system fault tree are analyzed. They are:(1)power supply failure of essential bus LHA,(2)failure of AC 220 V bus LNE and (3)failure of DC 125 V bus LBA.Based on the component failure rates of the standard French 900 MW pressurized water reactor, the unavilabilities of LHA、LNE and LBA buses are evaluated using SETS code and the dominant cut sets for each bus failure are obtained and analyzed.