Methods and Models for the Coupled Neutronics and Thermal-Hydraulics Analysis of the CROCUS Reactor at EFPL

Table 1

and control rod reactivity worth benchmark results.

Model	Eigenvalue		Control rod worth
		(pcm)	(pcm)
Serpent 2	1.00184 ± 8 pcm	—	358	—
PARCS
UO2 cell-size mesh	0.99944	−240	365.1	2%
U-metal cell-size mesh	1.00136	−48	317	−12%
UO2 cell-size mesh	0.99369	−815	365	2%
U-metal cell-size mesh	0.99545	−639	317	−12%