Fast Process Security Assessment Theory

摘要

This communication introduces a comprehensive theory for process security assessment.The theory can quickly provide mathematically proven upper and lower bounds on minimum time to disaster (the time disaster conditions will be reached in worst-case scenarios).Computational efficiency and reliability are achieved by performing process security assessment based on a time-derivative-based approach,rather than conducting massive process dynamic simulations.Further,the methodology enables prioritizing the process variables critical to plant security.This facilitates pinpointing the possible reasons of a security-threatening situation,quantifying the importance of each disturbance factor on the system's vulnerability,and creating a prioritized list of improvements/ counteractions for ensuring process security.Two runaway reactor examples are studied to demonstrate the methodology for security-threat analysis.