但是尽管发生了这一切不幸，反应堆外壳并没有破裂，放射性物质的泄漏也非常有限。

But despite all that, the reactor vessels have held, and radioactive release is limited.

youdao

报道中称1号和3号的反应堆外壳是完好的，但是2号反应堆中的某个构架被炸坏了，致使水无法完全淹没核心。

Primary containment vessels in units 1 and 3 are reportedly intact, but a structure in unit 2 has cracked, preventing water from fully covering the core.

youdao

如果反应堆的外壳结构不够坚固的话，那么燃料就有可能泄露到外面的环境，这将会对周围的地区产生毁灭性的结果。

If the containment structure around the reactor is not strong enough, the fuel potentially could be exposed to the outside environment, and can have devastating consequences for nearby communities.

youdao