One-dimensional experiments of a natural circulation two-phase flow under an external reactor vessel cooling

Loop analysis of a natural circulation two-phase flow under an external reactor vessel cooling

“…In the T-HERMES-1D experiments [5], the characteristics of the natural circulation flow had been studied under ERVC conditions. In this section, the calculated natural circulation mass flow rates were compared with experimental results.…”

“…The heat removal rate from the reactor vessel wall should be increased by the natural circulation two-phase flow between the reactor vessel wall and its insulation. The cooling capability of this natural circulation two-phase flow depends on the design of the insulation device such as the coolant inlet/outlet area, the outlet heights and their positions [4,5]. So, it is necessary to estimate and verify the natural circulation two-phase flow for an optimal ERVC design.…”

“…As one of the T-HERMES program, Kim et al [5] were conducted the natural circulation two-phase flow experiments using the T-HERMES-1D facility. This is one-dimensional and scaled down to be a half height and 1/238 channel area of the APR1400 reactor/insulation device system.…”

“…Experimental facility [5] As shown in Fig. 1, the experimental facility of the T-HERMES-1D consists of a test section, an air injection system, and a water tank, and the top of the test section and water tank are opened to the atmosphere.…”