核电站DcS仪控系统网络信息安全产品的研究与应用

Research and Application of Logic Testing Method for Application Software of Safety-level DCSSystem in Nuclear Power Plants

随着国内核电站的不断增多,核电站国产DCS仪控系统的可用性以及可靠性取得了重大进步,近些年来由于工业控制领域的信息安全问题频发,因此对DCS仪控系统的要求也在不断提高。依托北京广利核系统工程有限公司DCS仪控系统,笔者研究并设计了网络信息安全产品-和睦卫士网络安全系统。该网络安全系统已在红沿河核电站5号机组DCS仪控系统中应用,通过测试人员调试验证及现场使用,证明了其能够有效地应对网络战环境下复杂的信息安全威胁,并构建了积极防御、综合防范、本质安全的保障体系,为其他核电站甚至其他控制领域提供了良好的借鉴。

The safety level DCS system of nuclear power plant comprises numerous subsystems,each subsystem has a lot of logic designed for on-site equipment and process functions of nuclear power plant.If the logic testing is performed manually,it is not only a waste of manpower,but also cannot prevent human error.This paper analyzes and studies the logic of nuclear power plant safety DCS control system.By analyzing the current logic testing methods of application software,it is found that the current testing methods only support single-station testing and in a simulation environment,and cannot provide the real operation environment after the control station integration.In order to address these issues,a new logical automatic testing method of safety level DCS control system for nuclear power plants is proposed.By establishing a logic testing environment of application software of multiple control stations,the logic testing of multiple stations is realized simultaneously,and the logic testing of safety-level DCS control system for nuclear power plants is realized by optimizing the design of test cases.At present,this method has been applied in the safety-level DCS project of FangChenggang No.3 Unit.The results show that this method can not only effectively improve the test efficiency,reduce the human error rate,but also improve the test accuracy,which provides a reference for the logic testing of other nuclear power plant projects in the future.