Parallelization and application of SACOS-LMR for whole-core pin-by-pin thermal-hydraulic analysis in LMFRs

IF 1.9 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Annals of Nuclear Energy Pub Date : 2025-01-13 DOI:10.1016/j.anucene.2024.111177

Jinshun Wang , Ronghua Chen , Sicong Xiao , Xinyang Zhu , Minyang Gui , Wenxi Tian , Suizheng Qiu

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Abstract

The liquid metal cooled fast reactor is considered a representative design for the fourth generation of advanced reactors, owing to its inherent safety features, high power density, extended refueling intervals, and compactness. Thermal-hydraulic analysis of the reactor core remains critical for both safety and economic evaluations. In this work, we implemented parallel computing capabilities in SACOS-LMR using MPI, achieving a speedup ratio of 76 and maintaining parallel efficiency above 60% for a 100-processors parallel calculation. This work successfully resolved challenges related to inter-wrapper flow (IWF) in whole-core parallel computations and validated the IWF model using experimental data from the KALLA-IWF tests. Furthermore, we conducted whole-core pin-by-pin sub-channel calculations for the ALFRED reactor, analyzing the effects of the two-step and pin-level methods, as well as IWF flow rates, on the thermal–hydraulic characteristics of the reactor core.

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来源期刊

Annals of Nuclear Energy 工程技术-核科学技术

CiteScore

4.30

自引率

21.10%

发文量

632

审稿时长

7.3 months

期刊介绍： Annals of Nuclear Energy provides an international medium for the communication of original research, ideas and developments in all areas of the field of nuclear energy science and technology. Its scope embraces nuclear fuel reserves, fuel cycles and cost, materials, processing, system and component technology (fission only), design and optimization, direct conversion of nuclear energy sources, environmental control, reactor physics, heat transfer and fluid dynamics, structural analysis, fuel management, future developments, nuclear fuel and safety, nuclear aerosol, neutron physics, computer technology (both software and hardware), risk assessment, radioactive waste disposal and reactor thermal hydraulics. Papers submitted to Annals need to demonstrate a clear link to nuclear power generation/nuclear engineering. Papers which deal with pure nuclear physics, pure health physics, imaging, or attenuation and shielding properties of concretes and various geological materials are not within the scope of the journal. Also, papers that deal with policy or economics are not within the scope of the journal.