Enrichment: increasing the proportion of U235

The Georges Besse II enrichment plant in December 2010

The majority of reactors use uranium containing between 3% and 5% uranium-235 as fuel. Natural uranium contains only 0.7%. It is therefore necessary to increase the concentration of uranium-235 to obtain a fuel that can be used in nuclear reactors. This is called enrichment. AREVA uses the 2 industrial processes which are currently in use around the world: gaseous diffusion and centrifugation in Georges Besse plant and Georges Besse II plant, in commercial operation since 2009.

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Isotopic transformation of uranium

Natural uranium contains only a small amount of the fissile isotope U235. This must be increased to allow the reactivity of the fuel.

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Industrial uranium enrichment processes

Gaseous diffusion and centrifugation are enrichment processes currently in use. While the former is more frequently used, the latter provides better performance.

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"Georges Besse II" brochure

The Georges Besse II facility will take enrichment activity at AREVA into a new era. Presentation of the planned process of centrifugation enrichment, the design of the facility and its impact on the environment.

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A transition at Tricastin: diffusion to centrifugation

The Georges Besse plant, in Tricastin, enriches the uranium necessary for the operation of more than one hundred reactors, i.e. 25% of the world’s park.Why and how is enrichment performed? All about site technology, logistics, and environmental protection.