The IPHWR (Indian Pressurized Heavy Water Reactor) is a class of Indian pressurized heavy-water reactors designed by the Bhabha Atomic Research Centre.[1] The baseline 220 MWe design was developed from the CANDU based RAPS-1 and RAPS-2 reactors built at Rawatbhata, Rajasthan. Later the design was indigenised based on VVER technology which was scaled to 540 MWe and 700 MWe designs. Currently there are 18 units of various types operational at various locations in India (14 IPHWR-200, 2 IPHWR - 540 and 2 IPHWR-700) and 14 more IPHWR-700 reactors under construction/planned.