LAYER OF PROTECTION ANALYSIS FOR CO_2 STORAGE TANK

摘要

The CO_2 intermediate storage terminal play an important role in transporting the CO_2 transported through the CO_2 carrier to the subsea pipeline. In the case of large-scale CO_2 intermediate storage terminal, there are inherent hazard factors, which can lead to significant property loss and human damage in the event of an accident. In this regard, in order to ensure the safety of CO_2 intermediate storage terminal, the internationally certified safety assessment technique should be introduced. In this research, although the CO_2 intermediate storage terminal is composed of various subsystems, we only consider CO_2 storage tank among various subsystems. Since the CO_2 storage tank stores a large amount of CO_2, when the tank itself is ruptured, overpressure, low pressure, overcharging, etc., it may cause great damage due to a large amount of CO_2 leakage. We perform the Layer of Protection Analysis (LOPA) for CO_2 storage tank so as to achieve the functional safety required by the international standards. The LOPA provides the results of quantitative analysis whether the safety system about the hazard scenarios can ensure the risk within an acceptable risk level. In this research, through the LOPA of CO_2 storage tank, we evaluate the safety of conventional system and identify the required safety level for the additional safety system.