基于和睦系统的高温气冷堆保护系统自诊断方案设计

Design of Self-Diagnosis Scheme for Protection System of HTGR Based on FirmSys

高温气冷堆(HTR-PM,以下简称:高温堆)核电站的固有安全性较好,系统简单,具有四代核电系统特征。高温堆保护系统连续监测反应堆的状态,在监测到反应堆状态异常时实现紧急停堆功能和专设安全设施驱动功能。核电站运行期间,需要自诊断系统实时监视保护系统状态,当保护系统发生异常时进行降级或停堆,同时发出报警,提醒维护人员及时处理,以免故障i进一步扩大。高温气冷堆保护系统有其独特的设计要求,基于和睦(FrmSys)系统的高温气冷堆保护系统对自诊断提出了特殊需求(如装置状态自诊断),在其它堆型的自诊断中未进行类似设计实现,HTR-PM保护系统结合和睦系统的特点和板卡自诊断的方案,对装置自诊断信息先按板卡进行分解,然后再以装置为单位进行组合,形成装置自诊断状态,这种自诊断信息既可以对整个装置的信息进行显示,使运行者一目了然地了解某个装置的状态,又可以进行分解,确定具体故障板i卡的位置。这种特殊的自诊断方案可以推广至其它堆型上使用。基于FrmSys系统的高温气冷堆保护系统自诊断方案已经应用于石岛湾高温气冷堆保护系统。

The High temperature gas cooled reactor(HTR-PM)nuclear power plant has good inherent safety,simple system,high power generation efficiency and wide application,which has been widely recognized in the world.It is one of the fourth generation advanced nuclear reactor types that can meet the needs of the energy market in the future.The high-temperature reactor protection system continuously monitors the state of the reactor,and realizes the emergency shutdown function and the special safety facility driving function when the abnormal state of the reactor is detected.During the operation of the nuclear power plant,the self-diagnosis system is required to monitor the status of the protection system in real time.When the protection system is abnormal,it will be degraded or shut down.At the same time,an alarm will be issued to remind maintenance personnel to deal with it in time to avoid further expansion of the fault.The high temperature gas cooled reactor protection system has its own unique design requirements.The high temperature gas cooled reactor protection system based on Firmsys system puts forward special requirements for self-diagnosis(such as device state self-diagnosis),which is not implemented in the self-diagnosis of other reactor types.The HTR-PM protection system combines thecharacteristics of Firmsys system and the scheme of board self-diagnosis,The self-diagnosis information of the device is first decomposed according to the board card,and then combined with the device as a unit to form the self-diagnosis state of the device.This self-diagnosis information can not only display the information of the whole device,so that the operator can understand the state of a device at a glance,but also can be decomposed to determine the position of the specific fault board card.This special self-diagnosis scheme can be extended to other reactor types.The self-diagnosis scheme of HTGR protection system based on Firmsys system has been applied to the protection system of HTGR in Shidao Bay.