Tuesday's EU decision came after Germany moved to shut down seven aged atomic plants amid panic over the safety of nuclear power as the Japanese crisis worsened.
Guenther Oettinger, the EU's energy commissioner, warned that a third explosion and fire at the Fukushima plant on Tuesday heralded the world's worst nuclear disaster.
"There is talk of an apocalypse and I think the word is particularly well chosen," he said.
Mr Oettinger said that "stress" testing was needed to ensure that Europe's 143 reactors could withstand earthquakes and other emergencies.
"We want the safety of all reactors to be reviewed in the light of events in Japan," he said. (read more)