Marcoule Nuclear Site (French: Site nucléaire de Marcoule) is a nuclear facility in the Chusclan and Codolet communes, near Bagnols-sur-Cèze in the Gard department of France, which is in the tourist, wine and agricultural Côtes-du-Rhône region.

[2] Since 1995, the MELOX factory has been producing MOX from a mix of uranium and plutonium oxides.

The ATelier Alpha et Laboratoires pour ANalyses, Transuraniens et Etudes de retraitement (ATALANTE) is a CEA laboratory investigating the issues of nuclear reprocessing of nuclear fuel and of radioactive waste.

The site housed a number of the first generation French UNGG reactors, all of which have been shut down.

The explosion happened in the Centraco centre, used by Socodei, a sister company of Électricité de France.