Vulnerability analysis is a process to identify, evaluate, and assess susceptibility to natural and technological hazards . The studies of vulnerability analysis originated in the field of natural hazards and have been gradually applied to the field of technological hazards . Through a vulnerability assessment, areas of weakness and potential actions that would explore those weaknesses are identified, and the effectiveness of additional security measures is assessed . According to our previous analysis and the extracted literature , vulnerability analysis of CPI mainly focuses on three specific research issues: equipment vulnerability, human vulnerability, and regional vulnerability.