소형 모듈 원자로 수증기 응축 물리적 기반 모형의 척도 효과 평가 (Evaluating Scaling Effects of Steam Condensation Physics-based Model for Small Modular Reactor)
본 연구는 SMR의 피동 안전성을 강화하기 위한 응축열 전달 (CHT) 모델을 평가하는데 초점을 두고 있습니다.
The features of small modular reactors (SMRs) include their capacity to be factory-built, their modular design, their transportability, and multi-units capacity addition [1]. In a light-water-type SMR, water serves as both the coolant and moderator. During postulated accidents, steam reacts with the fuel cladding material (Zircoloy) to produce hydrogen [2]. Overpressure then leads to steam and hydrogen gas from the reactor pressure vessel being released to the reactor containment. Thus, the steam condenses in the containment wall, and heat is released to the containment wall and its outside water pool, which is called the passive containment cooling system (PCCS) [3]. Verification and validation effort of models for reactor systems (for e.g., PCCS) is necessary for further development of the models and in identifying the existing gaps, respectively. This study focused on assessing condensation heat transfer (CHT) models for enhancing the passive safety of small modular reactors (SMRs). It also encompassed a review of the theoretical and semi-theoretical CHT models and correlations. Condensation models such as the degradation factor, heat and mass transfer analogy (HMTA), and boundary layer models are used to study advanced nuclear reactor PCCS. The previous CHT models were developed for small tube geometries, which differ from the containment of SMR. This study examined the scaled relations of the CHT models for a physics-based model for analyzing laminar and turbulent film condensation downward flow conditions inside scaled tube geometries.
국내외 전문자료
2023-08-31
국내외 전문자료소형 모듈 원자로 수증기 응축 물리적 기반 모형의 척도 효과 평가 (Evaluating Scaling Effects of Steam Condensation Physics-based Model for Small Modular Reactor)
- 국가미국
- 발행기관Idaho National Laboratory (아이다호 국립연구소)
- 원본링크https://www.osti.gov/biblio/1988058
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