Study on the Impact of Thermal Agitation on Doppler Coefficient in Epithermal Range for Gd-Bearing Fuel

Table 4

Nuclide and reaction breakdown of impact on the Doppler coefficient of Gd-bearing fuel.

Nuclide reaction	Gd2O3 concentration [wt%]
	0	0.2	2	5	10	20
U-238 capture	9.4%	12.2%	12.0%	10.6%	8.4%	5.4%
U-235 capture	0.0%	0.0%	0.0%	0.0%	0.0%	0.0%
Gd-155 capture	—	0.0%	0.0%	0.0%	0.0%	0.0%
Gd-156 capture	—	0.0%	0.0%	0.0%	0.0%	0.1%
Gd-157 capture	—	0.0%	0.0%	0.0%	0.1%	0.1%
Gd-158 capture	—	0.0%	0.0%	0.0%	0.0%	0.0%
All	9.4%	12.2%	12.0%	10.6%	8.5%	5.6%