Two-region homogeneous reactors

This reactor has a two-region homogeneous core with nitride fuel the average bum-up target is 150 GW d/t to reduce fuel cycle cost. 

Fig. 10-1. Schematic fuel-processing flowsheet for a two-region homogeneous thorium breeder reactor.

Fig. 14-1. Initial critical concentration o in two-region, homogeneous, molten fluoride-salt reactors.

Initial-State Nuclear Characteristics of Two-Region, Homogeneous, Molten Fluoride-Salt Reactors Fueled with... 

Fig. 14-4. Initial fuel regeneration in two-region, homogeneous, molten fluoride-salt reactors fueled with U . Total power, 600 Mw (heat) external fuel volume, 339 ft core and blanket salts No. 1.

Initial-State Nuclear Characteristics of Two-Region, Homogeneous, Molten Fluoride-Salt Reactors Fueled with Fuel salt No. 2 37 mole % BeF2 + 63 mole % LiF -h UF4 + TI1F4. 

Figure 2 shows the results of sample calculations utilizing the homogenized and two-region inhour equations. The examples are infinite slab reactors with uranium-233 as the core and uranium-235 as the blanket fuels. The choice of placing uranium-233 on the inside is because of a particular study under way at the time the calculations were made. Fuel concentrations... 

The SUR-IOO reactor is a solid homogenous reactor with 20% enrichment uranium fuel, moderated by polyethylene and using graphite as reflector. The core has the form of a cylinder, with 24 cm in diameter and 26 cm high, and is cooled by natural circulation of air. It is made up of fuel elements in the form of polyethylene discs of 24 cm diameter and stacked to a total height of about 26 cm divided into two symmetrical blocks the upper block is fixed and the lower one is movable. Two cadmium plates outside the core — in the reflector region — are used as control rods. The reactor also has a Ra-Be neutron source. 

The reactor core of the RAPID is a homogeneous design with two regions. A two-dimensional R-Z model of the core is shown in Fig. XVII-16. 

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