India's oldest commercial nuclear power units at Tarapur Atomic Power Station in Maharashtra restarted following extensive modernization and refurbishment. Units originally commissioned in 1969 as India's first commercial nuclear plant. Unit 2 approved for restart by AERB on 7 May 2026. Refurbishment included complete replacement of reactor coolant recirculation piping with forged piping of advanced corrosion-resistant stainless steel, safety upgrades including containment filtered venting system and alternate cooling water system.