Material Technology


JEEP II is a heavy water moderated reactor. The heavy water also acts as coolant. The reactor has a maximum thermal power of 2000 kW. A tertiary heat exchanger transfers the heat to a light water circuit that is used for heating some of IFE’s buildings. Excess heat is removed by means of a dry cooling tower.

Reistad, Ole

Department Head


The reactor is operated at atmospheric pressure, and the heavy water temperature is around 50 ˚C. The fuel consists of approximately 250 kg uranium. The reactor vessel, which is made from aluminium, is surrounded by a 2.2 meter thick concrete shield, and the reactor is located inside a steel house. The steel house is constructed for overpressure, and is closed with airlock doors.

All surveillance and control is performed from the control room, which is located outside the steel house. To regulate the fission process in the uranium, the reactor is equipped with control rods. In case of a rapid shutdown, the rods fall into the core by gravity and stops the fissions instantaneously. The reactor is equipped with safety- and emergency cooling systems.

In normal operation the reactor is dependent upon electricity from the grid. Should this fail, emergency diesel generators and batteries will supply the power necessary to keep pumps and electronics running.

Foto: Mona L. Ramstad, IFEThe reactor building at Kjeller (Photo: Mona L. Ramstad, IFE)

Foto: Sverre Hval, IFEThe reactor hall with instruments for advanced material technology research (Photo: Sverre Hval, IFE)