[en] Full text: The reprocessing of LWR fuel elements has a significant industrial dimension in the world starting with many plants that are operating in England, France and the Russian Federation. The reprocessing of E C Magnox in England as well as the LWR of Japan, France and Germany generated an important quantity of plutonium, high activity wastes and approximately 0,95% slightly enriched uranium. The re-enrichment of the this uranium presents difficulties and economic penalties in the enrichment plants, derived from the activity presented by the RU, although in England it is carried out on an everyday basis. The possibility of using this material as SEU raw material for the fuel bundle of the natural uranium/heavy water reactors has a significant impact on the cost of the fuel cycle of the Argentine power stations. The chemical forms in which it is available are as nitrate in crystallised form, U F6 in solid form at room temperature and solid UO₃.The transport possibilities for these compounds are analysed in accordance with IAEA regulations, national laws as well as municipal ordinances that affect the transport of radioactive material and uranium compounds to Cordoba, Pilcaniyeu, Ezeiza or San Rafael. The use of a dry method is considered of utmost important for the conversion to Uranium Dioxide, due, essentially to its low environmental impact, which conditions the raw material of origin and the necessity to develop or acquire a new method of conversion other than that used at present in Argentina. Also discussed in the present paper are the necessary modifications in the production lines of fuel bars of the CONUAR S.A. plant in Ezeiza and the possible impact in the handling of the fuel bundles from their fabrication to their insertion in the reactor. Finally, considerations are made related to the development required to implement the use of this new raw material in the reactor, as well as its licensing and the costs involved