Physical Analysis of the Initial Core and Running-In Phase for Pebble-Bed Reactor HTR-PM

Table 1

Main design parameters of HTR-PM.

Parameters	Units	Values
Reactor total thermal power		2 × 250
Active core diameter	m	3
Equivalent active core height	m	11
Primary helium pressure	MPa	7
Helium temperature at reactor inlet/outlet	°C	250/750
Uranium loading per fuel sphere	g	7
Enrichment of fresh fuel spheres	%	8.5
Diameter of fuel spheres	cm	6
Number of fuel spheres in one reactor core		420,000
Average discharge burnup	GWd/tU	90