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About us

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Urenco Stable Isotopes is based in Almelo, the Netherlands. We have the facilities, personnel and resources to supply a wide range of isotopes to numerous clients in various markets.


An isotope is an element that has the same number of protons (the same atomic number) but a different number of neutrons in the nucleus (different atomic mass). Isotopes can either be stable or unstable. Due to their unique properties, stable isotopes are used in a variety of applications, including medical diagnosis, semiconductor production for electronic devices and research on materials used in nuclear environments.

Urenco SI Centrifuge Technology

Using the most advanced centrifuge technology present in the world today, we can enrich materials to exceed 99% or deplete below 1%.

The gas centrifuge consists of a fast spinning rotor inside a vacuum casing. Gas is fed into the rotor, where it is accelerated to the rotational frequency. Gas molecules are then subjected to centrifugal forces induced by the centripetal acceleration. Heavy molecules are subjected to larger forces than light molecules and there will thus be a higher concentration

of heavy molecules towards the rotor wall, whereas the lighter molecules are concentrated more towards the centre of the rotor. The gas is extracted from the centrifuge by a set of gas

extraction scoops; the heavy fraction scoop is located near the rotor wall, whereas the light fraction scoop is placed more towards the centre of the rotor.

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More than 50 years of experience

The advanced centrifuge technology that we use and own, is the result of over thirty years of continuous development. The production of stable isotopes started as a diversification project at our plant in Almelo, the Netherlands in the early 1990s.

Being diversified from the URENCO R&D department, a lot of enrichment knowledge has always been embedded in our DNA. From the early stages of our existence, the knowledge on converting gaseous materials and product processing has been continuously developed and a vast experience on handling various materials has been developed through execution of various projects.   

From the mid-1990s, we have been operating as a profitable autonomous business unit and we have been continuously diversifying our product portfolio.

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Our future developments

We are continuously developing and expanding our enrichment capacity and are on the constant look out for new development opportunities. Our R&D department is utilized with premium quality equipment and our staff is highly educated and trained. Development in close cooperation with our customers is one of our key goals and we aim for involvement in R&D projects from a very early stage in order to let our customers benefit from our knowledge to the fullest extent. This results in the highest quality and most cost efficient products and solutions.

Meet our managers

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Arjan Bos

Business Unit Manager, Urenco Stable Isotopes

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Martijn van Hezel

Commercial Manager, Urenco Stable Isotopes

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Peter Groen

Development Manager, Urenco Stable Isotopes

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