Exceptional load cases are those corresponding to events of very low occurrence probability requiring the safeshutdown and inspection of the vessel or plant.
异常负荷案例是相对很少发生的事件，要求安全关停和容器设备的检查。
2
Thus the operation safety is ensured and sensitivity increased; added UPS as backup power supply ensures safeshutdown and the indication of the reactor power at reactor shutdown.
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。
3
We are very pleased to hear your agreement on furnace shutdown for defect elimination this afternoon, which well displays your responsible and pragmatic attitude to the unit safe operation.