Integration of Nuclear Power Plant Safety and Security Codes Through EMRALD

Integrating nuclear safety and security is an area of ongoing research and may allow for a greater understanding of the dynamics at play during and after an adversary attack. Dynamic probabilistic risk analysis (DPRA) uses computer simulations to model the evolution of nuclear power plant (NPP) systems. DPRA codes exist for nuclear security and safety analysis, but there are no codes that model both areas within a comprehensive dynamic risk framework. This paper presents ongoing research using the EMRALD software to integrate existing nuclear safety and security codes. EMRALD can divide adversary tasks into subtasks and use these subtasks to investigate uncertainties for a force-on-force code: the Scribe3D software. EMRALD drives Scribe3D and determines the predicted timing and extent of damage to the NPP. Using these results, EMRALD controls a reactor response code, MELCOR, and determines the effects of predicted damage for the reactor response.