同时，在正常运行和失水事故时，安全壳提供生物屏蔽。
The containment also provides biological shielding during not only normal operation but also the event of a loss of coolant accident.
着重分析了屏蔽套损坏和中心支承推力轴承过度磨损等严重事故。
Stress have been paid on analysing some serious accidents for the can damages and over-wear of thrust bearings with centrally pivoted pads etc.
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