Nuclear power plant containment shell is a large-volume pre-stressed reinforced concrete silo-shell structure to prevent radioactivity, and is the most important protected object in special condition.

核电站安全壳是防止放射性物质向环境释放的大体积预应力混凝土筒壳结构，是特殊环境条件下的重点防护目标。

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Secondary containment for multiple containers will be, 150% of the largest container's volume OR 10% of the aggregate volumes of all containers, which is greater.

多个容器的二次容器溶剂 （应该是：容积） 应当不小于最大容器的容积的150%和所有基本容器容积总和的10%；

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