The Franceville basin in Gabon is home to unique geological conditions that allowed for natural fission reactors to occur. The paper delineates specific conditions required for these fission reactions—such as particular uranium concentrations, porosity of sandstones, and mineralogical composition—that contribute to achieving critical mass and sustained fission. Notably, the understanding of these conditions provides insight into how natural nuclear processes can occur under specific geological phenomena. The discussion also touches on the public perception and controversy surrounding nuclear waste disposal, highlighting the contrast between natural occurrences of fission and human-made nuclear activities.