A transport container for nuclear fuel is provided, comprising an outer container provided with internal insulation, the insulation defining a cavity, the cavity being provided with four or more sleeve(s), one or more fuel container(s) being received within a sleeve, each of the fuel containers having a releasable lid, the volume of the fuel containers is at least 5% of the external volume of the outer container. The container allows substantially higher volume proportions of enriched fuel to be safely transported than is possible with prior art containers.