Here are the words:
"There's no reason why technologically we can't employ nuclear energy in a safe and effective way. Japan does it and France does it and it doesn't have greenhouse gas emissions, so it would be stupid for us not to do that in a much more effective way."
This is from Reuters.
Video here. President Obama was speaking at a town hall in New Orleans. Go to the five minute mark for the nuclear comments.
Correction: we corrected Obama’s quote based on the video. Reuters did get it wrong.