A nuclear reactor that was officially closed four years ago is now being prepared to restart and may remain in operation until at least 2031. The Palisades nuclear power plant, located on the shores of Lake Michigan, is being worked on by teams from Holtec International to load fuel into the facility. Originally commissioned in 1971, the plant was equipped with a single 805 MWe pressurized water reactor and was initially licensed to operate until 2031. However, its former operator, Entergy, decided to shut it down in 2022. Holtec International acquired the plant and has since carried out extensive upgrade and modernization work, particularly on the power generator, to bring the plant back to operational condition for the remainder of its license period. Holtec International has also considered requesting a license renewal to operate the reactor until 2051. The company plans to deploy two modular reactors, named Pioneer 1 and Pioneer 2, each with a power output of 300 MW. To aim for the start of these two new reactors by 2035, Holtec has begun manufacturing a prototype of its reactor at the Idaho National Laboratory in the United States, to study the behavior of steam generators and replicate accident scenarios. Preparatory work for these two small modular reactors has already begun at the Palisades site. Nuclear reactors, like the one at Palisades, generate electricity by using controlled nuclear fission reactions to produce heat, which is then used to generate steam and drive turbines. Pressurized water reactors, the type used at Palisades, are a common design in nuclear power plants, where the heat from the reactor core is used to produce steam in a separate loop to drive the turbines, ensuring that the radioactive water does not come into direct contact with the turbine system. Small modular reactors, such as the Pioneer 1 and Pioneer 2, are a newer type of nuclear reactor that is smaller in size and can be manufactured in a factory and then transported to the site for installation. These reactors are designed to be more flexible and potentially safer than traditional large reactors, as they can be used in a variety of applications and may be easier to manage in case of an emergency. Holtec's plans for these reactors are part of a broader trend in the nuclear industry to develop more advanced and efficient nuclear power technologies.