Small modular reactors, deployable either as single or multi-module plant, offer the possibility to combine nuclear with alternative energy sources, including renewables. The Tracker provides a comprehensive and interactive overview of SMR projects under development worldwide. It includes more than 70 projects at various stages of progress, from initial site preparation through to operation, as well as over 50 key pre-project agreements and related developments. Small modular reactors (SMR) are much smaller than the current nuclear reactors (300 MWe or less) and have compact and scalable designs which propose to offer safety, construction, and economic benefits, and offering potential for lower initial capital investment and scalability. They can be prefabricated and assembled in a factory, then transported to the site ready for use. This significantly reduces construction time, complexity and costs. More importantly, the ever-elusive promise of electrification for all communities spread far. There is strong interest in small and simpler units for generating electricity from nuclear power, and for process heat.