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논문 기본 정보

자료유형
학술저널
저자정보
김한나 (경상국립대학교) 추희제 (경상국립대학교) 신용훈 (한국원자력연구원) 김형모 (경상국립대학교)
저널정보
한국유체기계학회 한국유체기계학회 논문집 한국유체기계학회 논문집 제28권 제1호(통권 제148호)
발행연도
2025.2
수록면
75 - 81 (7page)
DOI
10.5293/kfma.2025.28.1.075

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초록· 키워드

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Sodium Integral Effect Test Loop for Safety Simulation and Assessment (STELLA-2) is a comprehensive sodium thermal-hydraulic test facility developed by the Korea Atomic Energy Research Institute (KAERI) to evaluate the performance of safety systems in a sodium-cooled fast reactor (SFR) and the interaction between decay heat removal systems and the primary heat transfer system. In this study, the heat transfer performance of the FHX (finned-tube-type sodium-to-air heat exchanger) and AHX (helical-type sodium-to-air heat exchanger) within the decay heat removal system of STELLA-2, was analyzed using the GAMMA+ 1-D system code. Each heat exchanger was modeled by nodalizing its components and reflecting the heat transfer characteristics according to its structure in the GAMMA+ input file. Initially, a simulation based on design values provided by KAERI showed discrepancy in heat removal rate (Q) by 1.6% on the tube side and 8.0% on the shell side for the FHX, and 5.7% on the tube side and 2.7% on the shell side for the AHX, confirming that the GAMMA+ modeling adequately aligns with the design conditions. Based on this verification analyses were conducted using experimental data under natural and forced circulation conditions to evaluate the actual performance of the heat exchangers. The results revealed larger differences compared to the design conditions, with GAMMA+ overpredicting heat transfer performance. This difference is mainly due to the limitations of empirical correlations used within GAMMA+. Future studies will focus on enhancing GAMMA+ by improving its input file to provide more accurate predictions of heat exchanger performance. In addition, transient performance evaluations will be conducted to further validate GAMMA+, aiming to enhance the reliability of SFR operational safety evaluations.

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ABSTRACT
1. 서론
2. 1차원 시스템 모델링
3. GAMMA+ 해석
4. 결론
References

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