在确保反应堆安全的基础上，尽量扩大电厂的运行区域是反应堆停堆保护系统设计以及整定值确定的原则。
The principle of reactor trip protection system design and setpoint determination is that power plant operation range should be extended as large as possible on the basis of plant safety guaranteed.
计算结果表明，当保护停堆系统正常工作时，CEFR在所分析的事故工况下具有良好的安全性。
They demonstrate thatCEFR has excellent safety characteristics during the analyzed accident transients if there are effective protected scrams.
增设UPS不间断电源作系统安全电源，保证可靠停堆与在反应堆失去全部电源情况下指示堆功率。
Thus the operation safety is ensured and sensitivity increased; added UPS as backup power supply ensures safe shutdown and the indication of the reactor power at reactor shutdown.
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