Cj. Choi et Sy. Lee, TRANSIENT ANALYSIS OF A CONDENSATION EXPERIMENT IN THE NONCONDENSABLEGAS-FILLED CLOSED-LOOP USING AN INVERTED U-TUBE, Annals of nuclear energy, 23(14), 1996, pp. 1179-1188
Two-phase transient phenomena in the noncondensable gas-filled closed
loop was investigated numerically using the RELAP5/MOD3 code. Analyses
for three different modes observed in the inverted U-tube experiment,
i.e., reflux condensation, natural circulation, and oscillatory mode
between these two modes were performed. Major thermal-hydraulic phenom
ena were predicted well, however, system pressure and pressure drop at
the U-tube riser side were overpredicted than experimental data. High
er frequent flow oscillation than the data was also predicted. Copyrig
ht (C) 1996 Elsevier Science Ltd