The Atomic Energy Regulatory Board (AERB) announced on 20 June 2026 that India's oldest nuclear power reactors, Tarapur Atomic Power Station (TAPS) Units 1 and 2, have been successfully reconnected to the electricity grid following an extensive refurbishment program.
Refurbishment details
The refurbishment involved the complete replacement of reactor coolant recirculation piping with forged piping and fittings made of advanced corrosion-resistant stainless steel, according to the AERB. This upgrade is expected to enhance the longevity and safety of the reactors, which were originally commissioned in 1969.
The AERB stated that the project was executed under strict regulatory oversight to ensure compliance with international safety standards. The reactors underwent rigorous testing before being synchronized with the grid.
Impact on power supply
Each unit has a capacity of 160 MW, contributing a total of 320 MW to the grid. Their return is expected to bolster electricity supply in the western region of India, particularly during the peak summer demand.
“The successful completion of this refurbishment demonstrates India's capability to extend the life of aging nuclear assets while maintaining the highest safety standards,” said an AERB official.
Significance
TAPS Units 1 and 2 are boiling water reactors (BWRs) and are among the oldest operating nuclear reactors in the world. The refurbishment is part of a broader program to modernize India's nuclear fleet and ensure reliable, low-carbon electricity generation.
The reactors were shut down for the refurbishment in 2024, and the work was completed ahead of schedule. The AERB emphasized that the project involved indigenous technology and expertise.
