The Réacteur Universitaire de Strasbourg (RUS) was a 100 kW thermal Argonaut-class reactor built at the University Louis-Pasteur, located in the commune of Schiltigheim near Strasbourg.
A second Argonaut-class reactor, the Ulysse reactor, was already in operation in France at the Saclay research centre of the French Alternative Energies and Atomic Energy Commission.
The University Reactor of Strasbourg was the Basic Nuclear Installation (BNI) No.
[4] The reactor core consisted of an internal graphite neutron reflector surrounded by a ring of MTR-type nuclear fuel elements with an average 235U enrichment of 92.5% and an external graphite neutron reflector.
[3] The reactor was primarily a research instrument for conducting experimental irradiations, activation-based analysis of nuclear chemistry, solid-state physics, biology and the production of short-lived radioisotopes.