The 1000 MW second unit of Kudankulam Nuclear Power Plant (KNPP) was test synchronised with the southern power grid, marking generation of electricity from the unit and its supply to the grid.
Presently the unit is supplying 245 MW to the southern grid.
Clearance was obtained from Atomic Energy Regulatory Board (AERB) for the first synchronisation of the unit with the southern grid.
The power level will be increased in phases to 50, then 75 and 90 per cent and later to 100 per cent full power after obtaining necessary regulatory clearances.
Pressurised Water Reactor VVER-1000 had gone critical in July 2014 and the commercial operations started from December 31 the same year, with the unit coming to the aid of the then power starved Tamil Nadu.