India is also building a bigger scale FBTR or fast breeder Generation IV reactors

Generation IV reactors are a set of theoretical nuclear reactor designs currently being researched. These designs are generally not expected to be available for commercial construction before 2030. Current reactors in operation around the world are generally considered second- or third-generation systems, with the first-generation systems having been retired some time ago. Research into these reactor types was officially started by the Generation IV International Forum (GIF) based on eight technology goals. The primary goals being to improve nuclear safety, improve proliferation resistance, minimize waste and natural resource utilization, and to decrease the cost to build and run such plants.

• Gas cooled fast reactor
• Lead cooled fast reactor
• Molten salt reactor
• Sodium-cooled fast reactor
• Supercritical water reactor
• Very high temperature reactor