Global nuclear reactor median construction time 1981-2023

Nuclear reactors connected to the grid in 2023 had a median construction time of 121 months, or almost 11 years. This was the highest figure in the period, followed by a construction time of 120 months between 1996 and 2000.Nuclear reactors with longest construction timeIn 2022, Finland’s Olkiluoto 3 and France’s Flamanville 3 were the world’s nuclear reactors with the longest actual construction time compared to the projected schedule. The two plants started operations in 2023 and 2024, respectively. Shin Hanul 2, South Korea, was connected to the grid in 2023 after 126 months of construction works.Nuclear reactors under construction worldwideMore than one-third of the nuclear units under construction globally as of 2024 were located in China, which also recorded one of the lowest mean construction time for nuclear reactors worldwide. By comparison, the construction time for reactors in the United States averaged almost 43 years, or seven times the same value in China.

截至2023年，接入电网的核反应堆的平均建设周期为121个月，即近11年，这一数据为该时期最高记录。紧随其后的是1996年至2000年间120个月的建设周期。在2022年，芬兰的奥基卢托3号和法国的弗拉曼维尔3号核反应堆，相较于计划进度，实际建设周期最长。这两座电站分别于2023年和2024年投入运行。韩国新汉南2号核反应堆在经过126个月的建设后，于2023年接入电网。截至2024年，全球在建的核电机组中，超过三分之一位于中国，该国也记录了全球核反应堆最低的平均建设周期之一。相比之下，美国核反应堆的建设周期平均约为43年，是中国同值的七倍。