The head of the devastated Fukushima nuclear power plant is warning that the 2011 meltdown should be a warning to the world to prepare for the worst.

Naomi Hirose, president of Tokyo Electric Power Company, said the triple meltdown following the earthquake and tsunami should be taken into account when countries build new nuclear power facilities.

“Try to examine all the possibilities, no matter how small they are, and don’t think any single counter-measure is foolproof,” Hirose told London’s Guardian newspaper. “Think about all different kinds of small counter-measures, not just one big solution. There’s not one single answer.”

The interview came as the British government just signed a deal with EDF Energy to build a new generation of nuclear reactors in the country.