这一个是很熟悉的，增压安全阀的疏忽打开，或者是在压水式反应堆的减压阀，或者是在沸水式反应堆的安全阀。
This one is the familiar one, inadvertent opening of a pressurised safety or relief valve in a PWR or a safety valve in a BWR.
反应堆内的压力正在升高，但是放压阀出现了故障。
Pressure is also building up within the reactor, butthe release valve is malfunctioning, he said.
控制棒接连与过热蒸汽产生反应，释放出氢气以及放射性气体，这些气体也通过减压阀释放。
The control rods, in turn, react to the superheated steam and begin to release hydrogen and radioactive gases. These are also released through the PORV.
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