Analysis of Loss of Flow Events on Brazilian Multipurpose Reactor Using the Relap5 Code

Table 2

General characteristics of RMB (adapted from [27]).

Reactor
Nominal power	30 MWth
Coolant	Light water
Reflector	H2O, D2O, Beryllium
Thermal and fast neutron flux in the core	>2.0 × 10^14 neutrons·cm^−2·s^−1
Core
Flow direction in core	Upwards
Control rods drive location	Below core
Grid array	5 × 5
Dimensions	0.51 × 0.55 × 0.815 m
Number of fuel/control elements	23/6
Absorbing material	Ag-In-Cd
Fuel assembly type	MTR (LEU)
Nuclear fuel	U3Si2-Al enriched at 20%
Fuel density	4.8 gU/cm^3
Cooling
Core/pool inlet coolant temperatures (K)	311/306
Mass flow rate from pool to chimney (kg/s)	83.3
Inlet/outlet core mass flow rate (kg/s)	750.0/833.3