Radiogenic Lead with Dominant Content of ²⁰⁸Pb: New Coolant and Neutron Moderator for Innovative Nuclear Facilities

Table 5

Transition from (U,Pu)N-fuel to (U,Pu)O₂-fuel.

Parameter	Fuel	Natural lead	^208Pb
Content of Pu-fraction (%)	(U,Pu)N; (U,Pu)O2	13.84; 14.81	13.58; 14.45
Pitch of fuel lattice (mm)	(U,Pu)N; (U,Pu)O2	13.6; 12.2	23.6; 20.4
Height of the reactor core (cm)	(U,Pu)N	110	298
	(U,Pu)O2	125	314
Coolant velocity (relative units)	(U,Pu)N; (U,Pu)O2	1; 1.60	0.59; 0.87
Number of fuel rods (relative units)	(U,Pu)N; (U,Pu)O2	1; 0.89	0.41; 0.39
Pressure drop for coolant flow through the reactor core (relative units)	(U,Pu)N; (U,Pu)O2	1; 4.02	0.18; 0.57