Absorbed dose rate for marine biota due to the oil spilled using ICRP reference animal and Monte Carlo simulation

The current study aimed to obtain dose conversion coefficients for marine animals due to an oil spill accident using two variables: crude oil activity concentration and organism depth. Thorium series presented a dose contribution twice that uranium series for similar conditions. Bi-214 and Tl-208 stood out for delivering a higher dose rate for uranium and thorium series, respectively. Results obtained can be used to assess the maximum exposure time for emergency oil control, removal, and mitigation in an oil spill accident. •The dose rate due to the Th-232 series is twice higher than U-238 series.•Dose rate obtained are much lower than those obtained for severe accidents.•Results obtained can be used for taking action in an oil spill accident.