核电站海风环境模拟及风致氯离子对其影响的研究

NUMERICAL SIMULATION ON SEA BREEZE AMBIENT AND WIND-INDUCED CHLORION CORROSION OF A NUCLEAR POWER STATION

采用计算流体动力学模拟广东某核电站海风环境,分析风荷载对其影响,论证该核电站常规岛的安全性。并采用离散相模型对风致氯离子进行数值模拟,分析氯离子的运动轨迹,为该核电站常规岛混凝土进行氯离子含量取样提供指导,分析附着的氯离子对该核电站常规岛的影响,探究核电站常规岛主厂房和安全壳的耐久性。研究表明:该核电站在极限风荷载作用下是安全的;通过对氯离子的含量和结构混凝土的渗透性等取样调查分析,得出在其使用年限100年内安全壳和常规岛主厂房外层钢筋处的氯离子浓度将不超过0.04%,低于钢筋锈蚀的"门槛值"。

Using the method of CFD（Computational Fluid Dynamics）,a numerical simulation on sea breeze ambient of a nuclear power station in Guangdong province was conducted in order to analyze the influence of wind load on the structure and investigate the safety of conventional island.The discrete phase model was employed to simulate the tracks of wind-induced chloride ions near the area of the nuclear power station,so as to provide the guidance for sampling of chlorine ion content in the concrete of the nuclear power station.In addition,the effects of the attached chloride ions on the durability of the conventional island plant and containment were studied.The results showed that the design of the nuclear power station was safe under the ultimate wind load.And it was found that the content of chloride ions in concrete of containment and conventional island’s main building would be below 0.04% in 100 years,which was under the corrosion ＂threshold value＂ of the reinforced steel.