That leaves reconnecting the plant to the grid and restarting the cooling pumps inside as the last line of defence before a major release of radiation.

这样，核电站和铁网再次相连，内部冷却泵重新启动，它们成为严重核辐射爆发前的最后防线。

youdao

Correspondents say the incident has highlighted the fragility of the rescue operation at Fukushima two years after the meltdowns caused a major release of radiation.

BBC: Fukushima: Rat linked to outage at Japan nuclear plant

The possibility of a major meltdown, fire, and radiation release remains a possibility.

FORBES: The Japanese Nuclear Power Crisis Deepens