Osirak, probably - but the reactor use was clearly for bombs, not for energy. There may of course have been a straight bomb deal in the works, but the froggies probably got a bit of a scare when the Israelis hit the Iraqis. After all, if Israel decided to favor France with a hundred megatons or so of prime boom-boom, there is (and was) precious little France can do about it.
So now, the crapweasels are trying to push the "EU" out in front.