Madras Atomic Power Station (MAPS) located at Kalpakkam about 80 kilometres (50 mi) south of Chennai, India, is a comprehensive nuclear power production, fuel reprocessing, and waste treatment facility that includes plutonium fuel fabrication for fast breeder reactors (FBRs).

It is also India's first fully indigenously constructed nuclear power station, with two units each generating 220 MW of electricity.

[3] As of July 2016[update] the Prototype Fast Breeder Reactor (PFBR) was in its final construction stage, and was expected to reach criticality in March 2017 with 500 MW of electricity production.

[5] The facility houses two indigenously built Pressurised Heavy-Water Reactors (PHWRs), MAPS-1 and MAPS-2 designed to produce 235 MW of electricity each.

This cracking has led to the discovery of Zircaloy pieces in a moderator pump, requiring the power generation to be lowered to 170 MW.