在事件树分析中，考虑了各种类型和位置的破口，如：压力管破损、压力管和排管破损、供水管破损、稳压器卸压阀/蒸汽排放阀故障开启以及液体排放阀故障开启等。
Pressure Tube Rupture, Pressure Tube and Calandria Tube Rupture, Feeder Breaks, Pressurizer Relief/Steam Bleed Valves Fail Open, Liquid Relief Valves Fail Open, etc.
由于采用了双阀孔结构设计，在最大压差下排放凝结水的同时，还有一个为二次蒸汽系统设计的预设压差系统在工作。
Because of the dual-orifice design, there is a preset controlled pressure differential for the secondary steam system, while maximum pressure differential is available to discharge the condensate.
锅炉安全阀排放量的大小，决定了锅炉非正常情况下蒸汽压力的释放能力。
The discharge rate of the steam boiler safety valves controls the ability to relieve the steam pressure in the abnormal situations.
当系统运行压力降低至安全阀的回座压力时，主蒸汽安全阀自行关闭，停止排放，从而对主蒸汽系统的管道和设备起安全保护作用。
When the system pressure drops to the return pressure, the security valve will be closed and stop discharging, in the way of which the pipelines and equipments of the steam system will be protected.
汽嘴之上仍用压阀扣上，以保证多余的蒸汽能自由排放。
The pressure limit valve is still used to cover the steam nozzle for ensuring the surplus steam to exhaust freely.
汽嘴之上仍用压阀扣上，以保证多余的蒸汽能自由排放。
The pressure limit valve is still used to cover the steam nozzle for ensuring the surplus steam to exhaust freely.
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