Global number of nuclear reactors under construction 2024, by country

As of July 2024, there were 59 nuclear reactors under construction worldwide. China ranked first with 25 units. It was followed by India, with seven reactors under construction at the time. In the previous year, five nuclear reactors were permanently shut down worldwide.

Life cycle of nuclear reactors

With the average age of over 260 operable nuclear reactors worldwide surpassing 30 years, some reactors are set to retire soon. Most nuclear plants have an operating lifetime between 30 and 40 years. However, it is possible to replace major reactor components and some countries have renewed licenses to extend the lifetime of existing plants. 

Future of nuclear reactors

The majority of planned new nuclear capacity is in Asia. This includes new plants, as well as the upgrade of existing facilities. The construction and planning of new nuclear power reactors is essential to the safety of their operation. Methodical planning in plant design, materials, and labor ensures the success of the nuclear project. Nevertheless, the time required for the construction of nuclear reactors can vary largely, averaging at some seven years.