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UID:pretalx-amfc2026-KYXWXP@modelica.simtek.cc
DTSTART;TZID=CST:20260921T153500
DTEND;TZID=CST:20260921T160000
DESCRIPTION:System-level thermal-hydraulic models provide bulk quantities b
 ut cannot directly resolve rod-wise temperatures or hotspot migration duri
 ng local accidents. This study develops an FMI-based multiscale workflow 
 that couples a Modelica primary-loop FMU with an OpenFOAMderived reduced-o
 rder model of a 3×3 lead-bismuth eutectic rod bundle through a Python dri
 ver. Four scenarios are evaluated: baseline operation\, single-rod local o
 verpower\, and local overpower combined with mild or moderate loss of flo
 w. The coupled model predicts bundleaverage outlet temperature\, nine rod 
 temperatures\, hotspot temperature\, and limiting-rod location. The hotspo
 t-tooutlet temperature difference increases from 0.803 K in the baseline c
 ase to 18.274 K under local overpower with moderate flow reduction\, whil
 e the hotspot migrates to the south-east rod. OpenFOAM calculations at 15 
 s and 40 s identify the same limiting rod. All four 60 s scenarios require
  0.319 s of online execution time\, demonstrating faster-than-real-time lo
 cal accident assessment.
DTSTAMP:20261004T074221Z
LOCATION:FMI & MBSE (R2001)
SUMMARY:An FMI-Based Multiscale Workflow for Multi-Scenario Local Accident 
 Assessment in LBE Reactor Rod Bundles - Xinheng Zhao\, Guangliang Chen\, M
 injun Peng\, Xiang Zhang
URL:https://modelica.simtek.cc/amfc2026/talk/KYXWXP/
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