Numerical Simulations and Design Optimization of the PHT Loop of Natural Circulation BWR

Table 1

Input parameters.

Parameter	Value
Pressure	70 bar
Power	250 MW
Feed water inlet enthalpy	552 kJ/kg
Hydraulic diameter of core	0.0081 m
Length of core bottom	4.9 m
Flow area of single channel in core bottom	0.00274 m^2
Length of the core	3.5 m
Flow area of single channel in core	0.0048 m^2
Length of core top	3.87 m
Flow area of single channel in core top	0.00325 m^2
Length of horizontal tail pipe 1	3.51 m
Flow area of single channel in horizontal tail pipe 1	0.00325 m^2
Length of horizontal tail pipe 2	19.8 m
Flow area of single channel in horizontal tail pipe 2	0.01171 m^2
Length of vertical tail pipe	25.7 m
Flow area of single channel in vertical tail pipe	0.01171 m^2
Length of the downcomer	26.8 m
Area of the downcomer	0.2621 m^2
Area of inlet header	5.7 m^2
Length of inlet feeder	17.0 m
Flow area of inlet feeder	0.0074 m^2
Roughness value of the PHT loop	50.0e-6 m