Investigation of a Coolant Mixing Phenomena within the Reactor Pressure Vessel of a VVER-1000 Reactor with Different Simulation Tools

Table 4

Comparison of TRACE predictions with plant data for the final state.

Parameter	Final state	Accuracy	TRACE	Deviation
Thermal power, MW	286	$\pm 60$	286	0.000
Pressure above core, MPa	15.593	$\pm 0.300$	15.591	0.002
Pressure drop over RPV, MPa	0.417	$\pm 0.043$	0.404	0.013
Coolant temperature at core inlet #1, K	555.35	$\pm 1.50$	555.39	$-0.04$
Coolant temperature at core inlet #2, K	543.05	$\pm 1.50$	543.08	$-0.03$
Coolant temperature at core inlet #3, K	542.15	$\pm 1.50$	542.18	$-0.03$
Coolant temperature at core inlet #4, K	542.35	$\pm 1.50$	542.38	$-0.03$
Coolant temperature at core outlet #1, K	554.85	$\pm 2.00$	555.14	$-0.29$
Coolant temperature at core outlet #2, K	548.55	$\pm 2.00$	548.66	$-0.11$
Coolant temperature at core outlet #3, K	545.75	$\pm 2.00$	545.44	0.31
Coolant temperature at core outlet #4, K	546.45	$\pm 2.00$	545.69	0.76
Mass flow rate of loop #1, kg/s	4566	$\pm 110$	4657	$-91$
Mass flow rate of loop #2, kg/s	4676	$\pm 110$	4693	$-17$
Mass flow rate of loop #3, kg/s	4669	$\pm 110$	4724	$-55$
Mass flow rate of loop #4, kg/s	4816	$\pm 110$	4724	92