New RELAP5-3D Lead and LBE Thermophysical Properties Implementation for Safety Analysis of Gen IV Reactors

Table 4

Natural circulation system main parameters.

Parameter	Unit	Value
Flow area	m^2	9.348 · 10^−3
Absolute roughness	m	10^−5
Heater steady state power	kW	200.0
Heated section length	m	2.0
Heat sink wall temperature	K	610.0
Heat exchanger section length	m	2.0
Heat exchanger area	m^2	0.686
Heat exchanger wall thickness	m	2.5 · 10^−3
Gas plenum pressure	Pa	2.0 · 10^5
Vertical pipes length	m	10.0
Horizontal pipes length (4° vertical angle)	m	5.0
Expansion tank volume	m^3	0.36
Expansion tank height	m	0.6
Expansion tank level	m	0.3