[en] For purposes of various experiments, RAON heavy ion accelerator facility has been designed in Korea. ISOL is one system of RAON accelerators to generate and separate rare isotopes. Radioactive ions generated from target-proton reactions are separated and accumulated at separation devices. The accumulated isotopes release gamma radiations so radiation safety must be clearly assessed. FISPACT code solves the Bateman equation through 3 steps. The first step is to produce a collapsed library called COLLAPX based on the EAF-2010 reaction cross sections weighted by neutron fluxes. The second step is to produce a library called as ARRAYX condensed from collapsed library and decay library. The last step is a standard running module solving the Bateman equation. In this study, a process to evaluate radiations from the accumulated ions was proposed by modifying the COLLAPX file. The proposed modification was validated by comparing a solution of single element decay problem. Using the process, a preliminary study for radiation doses were performed in a virtual separation devise