The first unit is now generating 75 per cent of its capacity. It would reach 100 per cent "shortly", KNPP station director R S Sunder said at a function here.
The country's first 1,000 MW pressurised water reactor of the Indo-Russian joint venture project attained criticality (start of nuclear fission process) in July last year and commenced electricity generation in October.
The 1000 MW second unit is likely to attain criticality by June.