The Indian government informed the parliament that the commissioning of the Prototype Fast Breeder Reactor will be delayed due to "first of a kind technological issues."

The PFBR project has been delayed for more than twenty years. In its March 2023 statement, the Department of Atomic Energy (DAE) said that the commissioning was expected in 2024. In March 2024, DAE began loading fuel in the reactor's core.

In July 2024, India's Atomic Energy Regulatory Board (AERB) granted permission for the "First Approach to Criticality". However, in December 2024, the government pushed the commissioning date back to the end of 2025. And in April 2025, Department of Atomic Energy officials told the parliamentary standing committee on science and technology that the first criticality of the PFBR was expected to be achieved in March 2026 and the plant would be completed by September 2026.