_____________________________________________________________________________________________________ *Corresponding author: Email: sluka57@yahoo.com; Arch. Curr. Res. Int., vol. 23, no. 7, pp. 108-122, 2023 Archives of Current Research International Volume 23, Issue 7, Page 108-122, 2023; Article no.ACRI.104119 ISSN: 2454-7077 Radiological Safety Assessment of Agricultural Soil within the Bitumen Belt of Ondo State Nigeria, Using RESRAD-ONSITE and RESRAD-BIOTA Codes Luka S. Yani a* , Gregory O. Avwiri b and Chinyere P. Ononugbo b a Institute of Natural Resources, Environment and Sustainable Development (INRES), Port-Harcourt, Rivers State, Nigeria. b Department of Physics, Radiation and Environmental Physics Study Group, University of Port- Harcourt, PMB5323, Port-Harcourt, Rivers State, Nigeria. Authors’ contributions This work was carried out in collaboration among all authors. All authors read and approved the final manuscript. Article Information DOI: 10.9734/ACRI/2023/v23i7597 Open Peer Review History: This journal follows the Advanced Open Peer Review policy. Identity of the Reviewers, Editor(s) and additional Reviewers, peer review comments, different versions of the manuscript, comments of the editors, etc are available here: https://www.sdiarticle5.com/review-history/104119 Received: 03/06/2023 Accepted: 05/08/2023 Published: 02/09/2023 ABSTRACT Exploration and exploitation of bitumen can create radiation exposure pathways that must be considered in risk management scenarios. RESRAD-ONSITE and RESRAD-BIOTA developed by the US Department of Energy (US DOE) to assess contaminated sites, were used in the present study to predict the radiation dose and excess cancer risk associated with residual radioactive materials within Ondo State Bitumen Belt for the duration of 100 years, using site-specific Original Research Article