Vattenfall is working on restoring and renewing the Juktan pumped storage station to meet the growing demand for fossil-free energy. AFRY has been involved in the environmental impact statement and technical description for the application to the Land and Environment Court, and has now has been awarded a contract for further work on the plant design.

Located between lakes Storjuktan and Storuman in northern Sweden, the Juktan pumped storage station was the first and largest pumped storage plant in Sweden, operating from 1979 to 1996. Vattenfall has applied to the Land and Environmental Court in Umeå for the reconstruction of the power station, with plans for commissioning by 2032. Once operational, Juktan will be Sweden’s largest pumped power station, with a capacity of up to 315MW.

During the pre-study phase, AFRY handled the investigation and decision-making basis for the project’s continuation, including the environmental impact statement and technical description. In the next phase, AFRY will conduct technical investigations to optimize the Juktan facility’s performance and safety. This will cover the reconstruction of the power station, hydromechanical calculations for securing waterways, and development of requirements specifications and procurement documents for a new turbine and generator. AFRY will also collaborate with Vattenfall and Svenska Kraftnät to produce an RFG investigation for grid connection requirements.

“We are very proud to contribute with our global expertise in hydropower to the project, where a part of Sweden’s history is being revived. This type of large-scale energy storage is important to enable the industrial initiatives underway in northern Sweden. In a global context, hydropower is crucial for a more sustainable transition,” said Elon Hägg, VP and Head of Business Area Hydro at AFRY.

“Through these efforts, AFRY ensures that Vattenfall receives the technical data needed to be able to make an investment decision. Juktan can be an important contribution to increasing capacity in Sweden’s future energy system,” added Miriam Mesquine, business area manager Hydro Sweden at AFRY.

The project is ongoing, with commissioning planned by 2032 if an investment decision is made.