If the containment systems fail, a catastrophic radioactivity release to the environment could occur.

如果控制系统出现故障从而导致辐射释放到环境中，一场灾难将可能发生。

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Since the storage pools are not located within containment, a catastrophic radioactivity release to the environment could occur.

既然贮存池不再正常工作，一场释放到环境中的放射性灾难就可能发生。

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The result shows that if the cooling system of the spent fuel storage pool can be retrieved in 19 hours, the natural circulation cooling ability is sufficient to prevent radioactivity release.

计算结果表明。恰希玛核电厂乏燃料池冷却系统失效后， 只要在19 个小时内修复冷却系统， 不会出现大量放射性物质外泄。

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The resulting release of radioactivity forced residents of several towns near the plant to flee their homes, and a 20-kilometer (12.4-mile) zone around the plant remains closed to the public.

CNN: Obama affirms strong economic, security ties with Japan

The six-reactor Fukushima Daiichi nuclear plant was badly damaged after the 11 March 2011 earthquake and tsunami knocked out cooling systems to reactors, leading to meltdowns and the release of radioactivity.

BBC: Japan panel: Fukushima nuclear disaster 'man-made'