Methodological and Software Enhancements of Dynamic PRA Platforms for Event Assessment Applications

Sponsor: US Nuclear Regulatory Commission 

Project Title: Methodological and Software Enhancements of Dynamic PRA Platforms for Event Assessment Applications

PI: Professor Ali Mosleh

Funding Level : $217,000 

Scope: 

The main objective of the research is to develop needed features to make the ADS-IDAC dynamic PRA platform a more practical and realistic analysis tool for specific applications, primarily event assessments, and as a supplementary tool to analyze highly dynamic and complex accident scenarios in support of conventional PRAs. The modeling enhancements envisaged include more advanced system (hardware) and crew modeling capabilities, more comprehensive quantification features, and new post processing capabilities to extract risk insights from dynamic simulation runs. All these capabilities also require additional user-friendly graphical interfaces.
More specifically, the features will include
• Comprehensive quantification rules (full scenario dynamic probability calculations)
• More realistic model of team characteristic including those related to communication, tasking, and decision making (based on results from PI’s previous NRC grants)
• Extension of IDAC model to account for potential complexities in the action execution phase of crew response (a major post-Fukushima concern)
• Capability to use traditional fault tree models to explicitly define the impact of support system failures on accident progression (through their impact on frontline systems)
• Post processing rules and software capability for extracting risk insights from a large number of dynamic event tree scenarios generated typical by simulation runs
• Graphical User Interface to support the above features and also facilitate analysis of precursor events. This will include improved emergency operating proceduces editing capabilities.