New Scientist: The Singapore government is considering building a nuclear power reactor underground. The idea was proposed by Hooman Peimani, an energy security specialist at the National University of Singapore. Because the island country is so densely populated, there is no space where a typical large-scale reactor could be safely built and operated. Drawbacks to the plan include that such reactors would have to be scaled down in size because of the extra cost of building underground and that they could not be built in any earthquake-prone areas or regions with high water tables. However, in the event of a severe accident occurring at such an underground reactor, the access tunnels could be cemented in to contain any problems.