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September 30, 2025EnergiesOpen Access

Neutronic and Thermal Coupled Calculations for an HTGR Pebble with Discrete Power Generation Using Serpent and OpenFOAM

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Authors

MGMichał GórkiewiczJSJakub Sierchuła

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Overview

This analysis reveals thermal model configurations improving accuracy in power generation for HTGR, indicating enhanced safety features.

Key Points

  • Accuracy was maximized when the thermal model mesh was aligned with TRISO fuel particle size, enhancing the analysis.
  • The power density shifted outward within a range of 1% due to the feedback phenomena between power and temperature.
  • Multi-physics interface capabilities of the Serpent code were utilized to investigate various configurations in the thermal model.
  • Coupled thermal and neutron calculations allow for more accurate reflections of spatial phenomena occurring within the reactor.

Cite This Study

Górkiewicz et al. (2025) studied this question.

synapsesocial.com/papers/68dc1e438a7d58c25ebb23b6https://doi.org/10.3390/en18195148
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Also Consider

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  1. 1A Multiscale Coupled Framework for Prismatic HTGR Analysis: Integrating Homogenized CFD with Analytical TRISO Temperature Feedback2026
  2. 2High-Fidelity Monte Carlo Modelling of the HTGR Fuel Cycle for Fuel Utilization Optimization and Nuclear Safety2025
  3. 3High-Fidelity Monte Carlo Modelling of the HTGR Fuel Cycle for Fuel Utilization Optimization and Nuclear Safety Assurance2025
  4. 4Assessment of design approximation impact on neutronic characteristics of a high-temperature gas-cooled reactor fuel assembly2024
  5. 5Thermal-Hydraulic Analysis of Pebble Bed High Temperature Gas-Cooled Reactor After Shutdown Based on FLUENT Software2024