The SMR-300 is an evolutionary design. It uses a conventional fission reactor, with water as the cooling medium, and is designed with six decades of world-wide industrial operating experience with pressurized water reactors. The SMR-300 is advanced in the sense that it represents innovation through simplification and use of entirely passive safety systems, while relying on decades of proven operating history for the existing commercial pressurized light water reactor fleet. Most critically, the nuclear fuel that powers this reactor is commercially available right now and does not require any complicated research.
