利益攸关者

Stakeholders

反应堆保护系统，一、二回路冷却剂系统，操作员

Reactor protection system, one and two loop coolant system, operator

用例简述

Brief description of

the use case

通过一、二回路和中间回路排出堆芯余热，建立稳定的余热排出自然循环

The core residual heat is discharged through the one, two and intermediate circuits to establish a stable natural cycle of residual heat removal

前置条件

Pre-requisites

余热排出系统正常工作，非能动余热排出系统处于备用状态

The residual heat removal system is working normally and the passive residual heat removal system is in standby mode

后置条件

Post-condition

余热排出系统失效，二回路汽轮机等设备隔绝

Failure of the residual heat removal system, isolation of the second circuit turbine and other equipment

基本流

Basic flow

1）反应堆保护系统向非能动余热排出系统先后发出冷凝器下隔离阀与泄压阀阀位等控制信号；2）非能动余热排出系统自动启动；3）非能动余热排出系统先后向冷却剂系统注水排气；4）已建立稳定的余热排出自然循环，通知操作员等待关闭信号

1) The reactor protection system sends control signals to the passive residual heat removal system, such as the lower condenser isolation valve and pressure relief valve level; 2) The passive residual heat removal system starts automatically; 3) The passive residual heat removal system injects and exhausts water into the coolant system; 4) A stable natural cycle of waste heat removal has been established, and the operator is notified to wait for the shutdown signal

备选流

Alternative streams

1）反应堆保护系统向非能动余热排除系统先后发出冷凝器下隔离阀与泄压阀阀位等控制信号；2）非能动余热排出系统自动启动失败；3）报警，通知操作员手动启动以改变相应阀位；4）非能动余热排出系统先后向冷却剂系统注水排气；5）已建立稳定的余热排出自然循环，通知操作员等待关闭信号

1) The reactor protection system sends control signals to the passive residual heat removal system, such as the lower condenser isolation valve and pressure relief valve level; 2) The residual heat removal system fails to start automatically; 3) An alarm is raised and the operator is notified to start manually; 4) The residual heat removal system injects water into the coolant system and exhausts; 5) A stable natural cycle of waste heat removal has been established and the operator is notified to wait for a system shutdown signal