Risk Analysis on Modified Offloading System of LNG FSRU

Abstract

Electricity needs in various islands that are difficult to reach, prompting PT X to assist PT PLN in supplying natural gas fuel for power generation, using LNG technology. Small LNG carriers are designed to reach shallow water. Due to the height difference in the LNG carrier manifold being designed with the West Java FSRU manifold, it is not possible to carry out the loading and unloading process. Therefore the modification of loading and unloading equipment is needed. The modification of the West Java FSRU loading and unloading system was done to add the loading arm range to the small LNG carrier manifold. In 2013 WOAD (world Offshore Accident Data) stated, 9 accidents occurred during the process of loading and unloading liquid and 7 accidents that ended in fire. This study discusses a risk analysis on the loading and unloading system of West Java FSRU after modification. This study begins with hazard identification using. HAZOP (Hazard and Operability Study) method by analyzing the P&ID of modified loading and unloading system. Frequency analysis is done in to calculate an annual frequency of identified hazards and done using FTA (Fault Tree Analysis) and ETA (Event Tree Analysis) methods.