To address this problem, dynamic risk assessment (DRA) has gained increasing attention. A DRA method is defined as a methodology that updates the initial estimated risk number according to the spatiotemporal dynamic characteristics of the accident evolution . Khan et al. pointed out that the transition from traditional QRA to DRA is a natural evolution. DRA enables the implementation of inherent safety principles, features most desired in hazardous processes. Up to now, a wide range of stochastic simulation methodologies and graph-based methodologies were developed to capture spatiotemporal evolution characteristics of various multi-hazard coupling scenarios.