ES
Norway Norway · Kjeller · 59.983, 11.033 (approximate location)

JEEP I

JEEP I, a research reactor (heavy water) in Kjeller, Norway, with 450 kW of thermal power, operated by Institute for Nuclear Energy (IFA). Decommissioned, first critical in 1951.

It was one of the 4 research reactors Norway has had; 0 remain in operation today. It was the first research reactor in Norway to go critical. 10 heavy-water research reactors remain in operation today across 7 countries. Its declared uses include isotope production and neutron scattering.

Country
Norway
City
Kjeller
Type
Heavy water
Thermal power
450 kW
Operator
Institute for Nuclear Energy (IFA)
Status
Decommissioned
First criticality
1951
Purpose
Isotope production, neutron scattering

Data: IAEA RRDB · updated on Sep 3, 2026

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