Research Article
Prediction of Flow Regimes and Thermal Hydraulic Parameters in Two-Phase Natural Circulation by RELAP5 and TRACE Codes
Table 5
Calculated inlet flow rate, oscillation period, and errors normalized to the experiment, tests I-2 and I-1.
| | TRACE | RELAP5 | Experiment | Calc. | (Calc. − Exp.)/Exp., % | Calc. | (Calc. − Exp.)/Exp., % |
| Test I-2 | | | | | | Inlet flow rate (L/s) | | | | | | Average | 0.106 | −16.1 | 0.126 | 0.2 | 0.126 | Max. | 0.361 | 27.9 | 0.329 | 16.6 | 0.282 | Min. | 0.028 | −0.6 | 0.036 | 26.4 | 0.029 | Oscillation period (s) | 13.4 | −6.3 | 14.2 | −0.5 | 14.3 |
| Test I-1 | | | | | | Inlet flow rate (L/s) | | | | | | Average | 0.052 | −10.0 | 0.062 | 7.1 | 0.058 | Max. | 0.371 | 58.2 | 0.225 | −4.3 | 0.235 | Min. | 0.030 | 26.2 | 0.031 | 31.7 | 0.024 | Oscillation period (s) | 47.8 | −2.6 | 62.4 | 27.1 | 49.1 |
|
|