The lack of portability between Probabilistic Safety Assessment (PSA) software tools remains a significant barrier to efficient model exchange and collaborative analysis. Although initiatives such as the Open PSA (OPSA) project advocate for standardized representations of PSA models to promote interoperability, most existing tools still rely on proprietary formats that hinder direct transfer.
There has been previous work on enabling model conversion between widely used platforms such as CAFTA and SAPHIRE. However, limited solutions exist for translating models from RiskSpectrum—one of the most extensively used PSA tools in the nuclear industry—into the SAPHIRE environment. This work aims to address this gap by developing a method for converting complete RiskSpectrum PSA models into SAPHIRE-compatible formats, supporting broader model accessibility, verification, and cross-platform analysis.