In order to reduce air pollution and greenhouse gases, marine environmental regulations are being strengthened globally. As marine environmental regulations are strengthened, shipping industries are increasingly interested in LNG bunkering ships and LNG fueled ships as a way to reduce air pollution and greenhouse gases. Accordingly in this study were evaluated using the areal location of hazardous atmospheres when natural gas leaked owing to the damage of pipeline in a LNG fueled ship at Aewol port, jeju. Damages caused by flash fire, overpressure, and thermal radiation based on variables(ambient temperature, leakage hole size, pipe length, pipe pressure, pasquill stability, wind speed) were analyzed. From the results, regardless of variables, the damage range attributed to flash fire was the most significant, followed by overpressure and thermal radiation. It can be seen that the range of damage from flash fire and overpressure is most affected by pipe pressure and atmospheric stability, and the range of damage from thermal radiation has relatively little effect regardless of variables. In this study, when a fire or explosion occurred in Aewol port, it was found that it could affect up to 640m and confirmed that it should be equipped with gas alarm system, fire detector, automatic gas shut-off system and alarm system.