Essentially, there're two choices.
1: No more air-con, no refrigerator use, highly limited use of media devices, cold water baths everyday, anemic economy. Because there's not enough energy from fossil fuels and renewables to support us.
2: Nuclear power plants. No need to fret about energy shortages, but there's always the chance, though very much smaller these days, of a meltdown.
Oh, and the PM got his figures wrong. A nuclear power plant such as the 3rd Generation Advanced Boiling Water Reactor has an output of about 1300 MW. We'll need about 4 of these babies to supply Singapore with sufficient power at peak loads.
http://en.wikipedia.org/wiki/ABWR
I've been looking at the science behind the newer reactors, and the passive safety features are very impressive. Chernobyl had certain design features, such as a dangerously high positive void coefficient, that made it so vulnerable to the incident which actually occurred. For modern reactors, the passive features mean that the only way it's going to meltdown is if the operators were somehow brain-dead enough to take actions that negate the passive safety.