The Mühleberg NPP is located on the upper reaches of the Aare river, close to the Swiss capital Bern. 

Mühleberg had an unlimited operating licence but ceased operation in 2019 for economic reasons. The owner of the plant is BKW Energie AG.

It was a boiling water reactor type BWR-4 of the American company General Electric and was cooled with water from the river Aare. It generated around 3.1 billion kilowatt-hours of electricity a year – around one-sixth  of the country’s electricity needs. Mühleberg thus made an important contribution to the security of energy supply in the greater Bern area and north-west Switzerland. 


Facts and figures 

In operation : 1972-2019
Output: 390 MW gross, 373 MW net
Annual production: around 3100 GWh (with an average river water temperature of 11°C)