[en] In early 2011, BHP Billiton published the supplement to the 2009 Draft Environmental Impact Statement (EIS) for its proposed expansion of the Olympic Dam operation. The overall EIS process provides opportunity for public and government feedback on draft EIS and the supplement addresses the issues raised in formal submissions by the public and the government on the content of the draft EIS. The two documents together form the EIS for the proposed expansion and consist of some 10,000 pages of information, comment and conclusions. Of over 4,000 submissions received on the draft EIS, there were 372 unique submissions with the rest being form letters. Submissions were received on all aspects of the proposed expansion and this paper focuses on those related to radiation. Overall, there were minimal positive radiation related comments and comments were either; seeking more information or clarity on key areas of interest, voicing ideological concerns or reiterating common misconceptions or errors of fact. The public comments provide an insight into the radiation related issues that are causing concern in sections of the community, providing an opportunity to target either awareness or education programs:He aim of this paper is to provide an overview of the key issues raised and describe how they were addressed in the supplement to the EIS.