Its main office is at Kjeller, Norway, and slightly under half of the institute’s activities are based in Halden.
The JEEP II reactor at Kjeller was used for basic research in physics and material science, as well as production of radiopharmaceuticals.
A new solar cell laboratory at Kjeller was opened in 2009, and cost about 50 million NOK, one of the biggest investments made by the Institute.
[1] The Centre for Environmental Energy Research hosted by IFE will concentrate on the development of silicon-based solar cells.
A 12 May 2013 article in O Estado de S. Paulo broke the story about testing done at the Halden Reactor in regards to the nuclear submarine program of Brazil.
[2] On 4 September, media said that the institute "is admitting to illegal cooperation with companies in four more countries:"[3] Russia, Argentina, France and the United States.