Assessment of the MARS Code Using the Two-Phase Natural Circulation Experiments at a Core Catcher Test Facility

Table 1

Initial and boundary conditions for the selected tests.

Case	3-1	4-1	4-2	4-6	4-7	4-8
Initial water level (m)	8.9	6.4	6.4	8.9	8.9	8.9
Loss coefficient of the orifice	1.90	20.3	20.3	20.3	20.3	20.3
Peak power (kW)	250	250	63	63	125	188
Initial temperature (K)	288.5	288.7	367.6	367.5	370.7	368.5

Initially, the pressure at the top of the tank is 0.1013 MPa for all the cases.
The heater power is given as a function of time for each test.