Research Article

The Concept of the Heat Removal System of a High-Flux Research Reactor

Table 1

Main parameters of a high-flux RNI.

Reactor characteristicsValue/meaning

Reactor typePressurized water reactor with intermediate neutron spectrum and central trap
Power, MW50
Maximum neutron flux density, cm−2s−12.2 × 1015
FuelUranium dioxide, 20% U-235 enrichment
Core geometryCylindrical shape with a neutron trap in the center
Number of cells for fuel assemblies, pcs30
Fuel assembly type, pcsVVR-KN
Including the following
5-pipe, pcs6
8-pipe, pcs24
Number of cooling systems, pcs2
Number of cooling circuits, pcs3
Coolant of the 1primary circuitLight water
Core diameter, mmØ480
Core height, mm600
Coolant flowrate in the primary circuit, t h−11208
Inlet temperature of the fuel assembly, °C124
Outlet temperature of the fuel assembly, °C159
Coolant heating in the core, °C35
Maximum temperature of fuel elements, °C229
Head loss in the core, kPa270
Pressure at the core outlet, Pa4.7 × 106
Hydraulic diameter of circulation pipes mm400
Number of primary circuit circulation pumps, pcs2
Number of circulating pumps, pcs2