Exposing the acts of unloader, sucker and Grab in the grain terminal of Imam Khomeini Port by manipulating ORESTE and Shannon's Entropy Methods in the three phases will lead to identification and prioritization of the grain discharging processes risks from the ship. In the first phase, by the analysis of the events and occurred incidents information bank about the surveyed matters and also setting brainstorming sessions with the terminal’s experts, 22 risks were identified. In the second phase by using from the Shannon’s Entropy, the criteria (occurrence frequency, severity and detection) were weighted. Then based on the criteria of determination of causes occurrence probability (occurrence frequency), the extent of its impact on process after occurrence (severity) and probability of its identification prior to having impact on the process (detection), the identified risks were scored in form of a scale from 1 to 10. Finally according to the obtained scores of each risk, the ORSTE decision matrix was conducted and subsequently in the third phase by using this method, all of the identified risks were prioritized. Based to the achieved results, the slippery one (falling from the stairs) and the risk of the operator’s chair shaking and the risk of the grain discharging dust and vacuuming the filters were attained the top priority respectively.

Keywords: risk, grain discharging, Imam Khomeini Port, ORESTE, grain terminal