Prediction of Flow Regimes and Thermal Hydraulic Parameters in Two-Phase Natural Circulation by RELAP5 and TRACE Codes

Table 2

Calibrated values of uncertain input parameters, test S-1.

Input parameter	TRACE	RELAP5	Experiment
Channel inlet temperature (°C)	89.8	89.8	89.0
Heated channel heat loss (W)	350	350	N/A
Riser heat loss (W)	200	200	N/A
Upper riser tube heat loss (W)	200	200	N/A
Inlet loss coefficient	28	28	N/A