3D Simulation of External Flooding Events for the RISMC Pathway

Abstract

Incorporating 3D simulations as part of the Risk-Informed Safety Margins Characterization (RISMIC) Toolkit allows analysts to obtain a more complete picture of complex system behavior for events including external plant hazards. External events such as flooding have become more important recently -however these can be analyzed with existing and validated simulated physics toolkits. In this report, we describe these approaches specific to flooding-based analysis using an approach called Smoothed Particle Hydrodynamics. The theory, validation, and example applications of the 3D flooding simulation are described. Integrating these 3D simulation methods into computational risk analysis provides a spatial/visual aspect to the design, improves the realism of results, and can prove visual understanding to validate the analysis of flooding.

Risk informed validation framework for external flooding scenario

“…Development of simulation-based fragility models for the top events mentioned in section Event Tree / Fault Tree Logic can be either a finite element (FE) or a smoothed-particle hydrodynamic (SPH) analysis (Bodda, 2018;Dinh et al, 2015;Lin, 2019;Prescott et al, 2015;Smith et al, 2014). In this study, the intensity measure for the initiating event is storm surge height.…”

Advanced Validation Risk-Informed Approach for the Flooding Tool Based Upon Smooth Particle Hydrodynamics: Validation and Development Status of NEUTRINO

“…The predictive ability of NEUTRINO for the small-scale flow characteristic such as vortex was simply discussed in the reference [21,26]. For the simulation of a constant flow past a fixed solid body, initial results of NEUTRINO seemed to predict well the characteristic flow patterns such as vortex shedding.…”