“India already has a live 220 MW Pressurised Heavy Water Reactor design. We have a number of them working in the country including Narora (Uttar Pradesh), Rajasthan, Kakrapar (Gujarat), Kalpakkam (Tamil Nadu), Kaiga (Karnataka) and so on. This particular design is being modified and converted as Bharat Small Reactors... In other words, Bharat Small Reactors are nothing but 220 MW Pressurised Heavy Water Reactors (PHWR) with some improvements,” Grover told reporters on the sidelines of an event at Indian Institute of Management-Ahmedabad (IIM-A).

Link: https://www.thehindubusinessline.com/economy/bharat-small-reactors-being-readied-modification-of-220-mw-reactors-under-way-says-atomic-energy-commissions-grover/article68535895.ece