安全级DCS与RPN源量程接口信号的改进及应用
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摘要
随着核电厂数字化的发展,核仪表系统(Ex-core Nuclear Instrumentation System,简称RPN)[1,2]的控制和保护功能已在安全级分布式控制系统(SafetyDigitalControlSystem,简称安全级DCS)平台内实现。为了保证核仪表系统能够连续稳定地监视反应堆核功率,某核电厂调试期间,通过对安全级DCS与RPN系统接口的试验信号进行改进优化,避免了安全级DCS试验时误切除RPN系统源量程,消除了源量程探测器误触发非预期停堆保护信号的风险,保证了核电厂商运后的安全稳定运行。同时作为经验反馈,对RPN源量程投运和退出信号逻辑的原理进行了详细分析,为在运核电厂的数字化改造及三代核电技术的设计研究提供借鉴和思考。
With the development of digital power plants, the control and protection functions of the ex-core nuclear instrumentation system(RPN) have been implemented in the safety DCS. In order to ensure that RPN can continuously and stably monitor the reactor nuclear power, during the commissioning of a nuclear power plant, the test signals of the safety DCS and RPN interface removed from the RPN source range, eliminating the source. The risk of false detection of the unexpected reactor trip protection signal by the range detector ensures the safe and stable operation of the nuclear power plant after commercial transportation. At the same time, as an empirical feedback, the principle of the RPN source range commissioning and exit signal logic is analyzed in detail, which provide reference and consideration for the digital transformation of the nuclear power plant and the design and research of the third-generation nuclear power technology.
With the development of digital power plants, the control and protection functions of the ex-core nuclear instrumentation system(RPN) have been implemented in the safety DCS. In order to ensure that RPN can continuously and stably monitor the reactor nuclear power, during the commissioning of a nuclear power plant, the test signals of the safety DCS and RPN interface removed from the RPN source range, eliminating the source. The risk of false detection of the unexpected reactor trip protection signal by the range detector ensures the safe and stable operation of the nuclear power plant after commercial transportation. At the same time, as an empirical feedback, the principle of the RPN source range commissioning and exit signal logic is analyzed in detail, which provide reference and consideration for the digital transformation of the nuclear power plant and the design and research of the third-generation nuclear power technology.
引文
[1]国家能源局.压水堆核电厂堆外中子注量率测量系统安装与试验技术规程:NB/T 20161-2012[S].2012.
[2]广东核电培训中心.900MW压水堆核电厂系统与设备[M].北京:原子能出版社,2005.
[2]广东核电培训中心.900MW压水堆核电厂系统与设备[M].北京:原子能出版社,2005.