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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Shell added that it had placed containment booms into the surrounding waterways to stop the flow of oil.

壳牌石油补充说，他们已经在周围水域设立了控制栅栏，防止石油泄漏。

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A Shell representative said: "Containment options are being progressed as a longer term option."

一名壳牌代表称：“密封选项正在被作为一项长期选项而开展。”

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In like manner, I believe that reactors should be designed such that an earthquake of any magnitude could not destroy the reactor or its containment shell, further that if the reactor core was to start to melt down, the melt down itself would shut the reactor down and, at the very worst, the reactor would entomb itself with no potential release of radiation into the environment.

FORBES: A Year After Fukushima Meltdown, Is Nuke Power Any Safer?

Shell has also been asked to build a containment device in case it is needed.

BBC: Shell claims progress on North Sea oil leak

The damage occurred during a test of what Shell says would be the first-ever containment system deployed in Arctic waters.

FORBES: After Mishaps, Shell Dials Back Arctic Oil-Drilling Plans