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원자로 용기와 단열재 사이의 자연순환 유동에 관한 연구
하광순(K. S. Ha),박래준(R. J. Park),김상백(S. B. Kim),최지용(J. Y. Choi),김광용(K. Y. Kim) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
To observe and evaluate the two-phase natural circulation phenomena through the gap between the reactor vessel and the insulation in the APR1400 under an external reactor vessel cooling, the T-HERMES program has been performed at KAERL. By a HERMES-HALF experimental study, the behaviors of the two-phase natural circulation flow in the insulation gap were observed, and the liquid mass flow rates driven by the natural circulation loop were measured by varying the air injection rate, the coolant inlet area and configuration, the outlet area and the water head condition of the coolant reservoir. And, three dimensional numerical analyses of the HERMES-HALF experiments using a CFX-5.7 commercial code have also been performed to evaluate the effects of ICI nozzles and shear keys on the natural circulation flows.