SINGAPORE – Plans to deploy small modular reactors (SMRs) are gaining momentum, as more countries look to tap nuclear energy.The Straits Times looks at the most promising technologies, how safe they are and where they can be found.What are SMRs?SMRs are advanced nuclear reactors with a power capacity of up to 300MW, or 0.3 gigawatts, about one-third the capacity of a conventional nuclear plant.SMRs generate electricity through nuclear fission, the process of splitting heavy atoms such as uranium. This releases one million times more energy per kilogram than burning carbon.For context, Singapore had the capacity to produce about 13 gigawatts of electricity…