Numerical Study of Natural Circulation Flow in Reactor Coolant System during a Severe Accident

Table 1

Analysis conditions.

Location	Setting (base case)
Working fluid	SF6
Operating pressure	2,068,427 Pa
Secondary side temperature (tube wall)	337.85 K (64.7°C); (Inlet: 51.4°C, outlet: 66.1°C)
Tube wall	Convective heat transfer (outer surface); hext = 250 W/m^2K; Text = 337.85 K
	No-slip wall
Reactor and hot leg; Plenum and tube sheet wall	No-slip wall; Adiabatic
Reactor-hot leg interface	Porous jump