Enhancing accuracy and efficiency of RMC/SUBCHAN neutronics and thermal-hydraulics coupling system for BEAVRS simulation

IF 3.3 3区工程技术 Q1 NUCLEAR SCIENCE & TECHNOLOGY

Progress in Nuclear Energy Pub Date : 2025-02-21 DOI:10.1016/j.pnucene.2025.105666

Hao Luo , Kaiwen Li , Jie Li , Zhaoyuan Liu , Jingang Liang , Jiyang Yu , Shanfang Huang , Kan Wang

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引用次数: 0

Abstract

High-fidelity whole-core multi-cycle simulations, incorporating coupled neutronics performance analyses and thermal-hydraulics feedback, play a crucial role in understanding the complex behavior of operating nuclear power reactors. This paper presents a high-performance neutronics and thermal-hydraulics (N-TH) coupling system between RMC and SUBCHAN developed for the large-scale, multi-physics analyses of the pressurized water reactors (PWRs). The new coupling system was validated using a two-cycle whole-core depletion benchmark BEAVRS, comparing criticality boron concentration (CBC) and assembly-wise detector signals with measurements. The accuracy of RMC/SUBCHAN solutions in terms of CBC falls within the range of [-50.83 ppm, 1.5ppm] for cycle1 and [-8.53 ppm, 12.89ppm] for cycle 2. The root mean square (RMS) relative errors of the detector signals are in the [1.58%, 4.56%] range for both cycles, demonstrating great agreements with the measurements. Two acceleration techniques were employed in the coupling, achieving a 16.8% speedup for each depletion step. Finally, an explicit heat generation scheme was presented and analyzed, which features more accurate prediction of energy deposition distribution in different regions and materials and improves the accuracy of the thermal-hydraulics solutions.

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来源期刊

Progress in Nuclear Energy 工程技术-核科学技术

CiteScore

5.30

自引率

14.80%

发文量

331

审稿时长

3.5 months

期刊介绍： Progress in Nuclear Energy is an international review journal covering all aspects of nuclear science and engineering. In keeping with the maturity of nuclear power, articles on safety, siting and environmental problems are encouraged, as are those associated with economics and fuel management. However, basic physics and engineering will remain an important aspect of the editorial policy. Articles published are either of a review nature or present new material in more depth. They are aimed at researchers and technically-oriented managers working in the nuclear energy field. Please note the following: 1) PNE seeks high quality research papers which are medium to long in length. Short research papers should be submitted to the journal Annals in Nuclear Energy. 2) PNE reserves the right to reject papers which are based solely on routine application of computer codes used to produce reactor designs or explain existing reactor phenomena. Such papers, although worthy, are best left as laboratory reports whereas Progress in Nuclear Energy seeks papers of originality, which are archival in nature, in the fields of mathematical and experimental nuclear technology, including fission, fusion (blanket physics, radiation damage), safety, materials aspects, economics, etc. 3) Review papers, which may occasionally be invited, are particularly sought by the journal in these fields.