Natural circulation studies in a lead bismuth eutectic loop

Development of innovative reactor-integrated coolant system design concept for a small modular lead fast reactor

“…The PILLAR is a scaled-down facility for experimental verification of the characteristics of the URANUS reactor through similarity analysis from an engineering perspective. 6,10,11 The ratio of the height of the PILLAR to that of the URANUS reactor was set to unity because height is 1 of the most important factors affecting natural circulation, 12 and the average passage area was reduced by a constant factor to decrease the volume of the PILLAR. Table 1 shows the design model of the PILLAR with the average passage area ratio set to 0.005 and mass flow rate ratio fixed at 0.00468, because the velocity ratio is fixed at 0.940.…”

“…Gauss's law can be derived as shown in Equation (9). By combining Equations (4) and (9), radial and axial directions of the magnetic field in cylindrical coordinates and considering axial symmetry are obtained as Equations (10) and (11). Figure 5 depicts the operation principle of the reactorintegrated MHD coolant circulation system in Figure 4 based on Maxwell's equation, where there is an axial electromagnetic force only in the annular passage, not the central passage.…”

Study of steady-state heat transfer with various large beam intensities in ADS windowless spallation target

“…Optimal values of window geometry and flow configurations including the thermal load that the window experiences were obtained along with required parameters for the plasma torch. Borgohain [5] carried out steady-state natural circulation experimental studies for different power level as well as transient studies for start-up of natural circulation in the loop, loss of heat sink and step power change. Cho [6] proposed a numerical design study to obtain the optimal design parameters for a 20 MW spallation target for a 1000 MWth ADS and the results show that a 30 cm wide proton beam with a uniform beam distribution should be adopted for a spallation target of a 20 MW power.…”

Experiments and analysis on LBE steady natural circulation in a rectangular shape loop

“…Tarantino and Bernardi (2010) performed LBE NC tests with gas-injection on the NACIE loop and CIECE pool test facility to verify the code post-test in ENEA. Moreover, the stable LBE NC had been obtained from experiments by Takahashi (2005), Choa and Batta (2011) and Borgohain and Jaiswal (2011) performed at different conditions. Some experiments mentioned above were carried out for HLM NC study.…”