Abstract

Designing a novel scaled modular test facility as a part of an experiment for condensation heat transfer (CHT) in Small Modular Reactors (SMRs) is the main focus of this study. This facility will provide data to evaluate the scalability of models for predicting heat transfer in the passive containment cooling system (PCCS) of SMR. The nuclear industry recognizes SMRs as one of the future candidates for clean, economical, and safe energy generation. But licensing requires proper evaluation of the safety systems such as PCCS. The knowledge gap from the literature review showed a lack of high-resolution experimental data for scaling of PCCS and validation of computational fluid dynamics (CFD) tools. Also, presently available test data are inconsistent due to unscaled geometric and varying physics conditions. This inconsistency leads to inadequate test data benchmarking. This study fills up this research gap by developing three different diameters (100 , 200, and 400) vertical condensing test section with annular cooling for scale testing and analysis. Saturated steam is chosen as the working fluid with noncondensible gas (NCGs) like N, He, and air in different mass fractions. This facility adopted a pre-cooler unit for inlet steam conditioning and a post-cooler unit for condensate cooling. Next, high fidelity sensors, instruments, and data acquisition systems are installed and calibrated to set up the modular facility. Lastly, facility safety analysis and shakedown tests are performed.

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