Kudankulam Nuclear Power Plant uses VVER (Water-Water Energetic Reactor) reactors, which are a type of light water reactor. Kaiga Generating Station uses Pressurized Heavy Water Reactors (PHWRs). Tarapur Atomic Power Station houses both Boiling Water Reactors (BWRs) (Units 1 & 2) and Pressurized Heavy Water Reactors (PHWRs) (Units 3 & 4).