FIRE RISK ASSESSMENT FOR MOBILE OFFSHORE PRODUCTION UNIT (MOPU)

Abstract

The study assesses the fire and explosion impacts at the (MOPU) mobile offshore production unit from the hydrocarbon releases (including blowouts) at the MOPU and the bridge linked WHP (wellhead platform). It does not include releases from the subsea pipelines and the FSO (Floating Storage and Offloading) which is stationed at a safe distance from the MOPU and WHP. The study utilizes DNV Phast 8.22 and Aloha software simulation to accommodate the future trends within risk analysis in an industry, where quantification of risk is legally required. A generic and representative offshore installation setup is developed as a test environment, including drawings, process streams, process sections and a representative manning setup. Case studies test the model capabilities and are discussed in relation to the selected software platform, hydrocarbon consequence modelling and uncertainty. The results support the potential of this project’s model at this stage of development and presents, how the use of Aloha software is able to increase the expert’s confidence in the results by improved post processing compared to the DNV Phast 8.22 software results. As a result, it was acknowledged that the both software’s DNV Phast 8.2 and aloha are almost giving the same results, but the DNV Phast gives more and accurate results.