struct NEUT

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Next: struct grid Up: Data structures Previous: Simple data structures Contents Index

struct `NEUT`

The most important structure is called NEUT and is of type neutronics. It contains all information necessary for the neutronics computation. The form of the structure is shown below

Description
l: Energy released by one fission in ${}^{235}\mbox{U}$ [J].
l: Cross-sectional area occupied by fuel of a single fuel assembly [ $\mbox{cm}^2$ ].
l: Total generated power by a single fuel assembly [W].
l: Number of energy groups in the neutronics model [--].
l: Z-coordinate for the bottom of the steel plate [cm].
l: Z-coordinate for the bottom of the core [cm].
l: Z-coordinate for the top of the core [cm].
l: Z-coordinate for the top of the reactor [cm].
l: Structure of type neut_grid for holding information on the computational grid (see section 3.5.3).
l: Vector of order grid.N_core which specifies the mean fuel temperature in region k, where k lies within the core [ ${}^\circ\mbox{C}$ ].
l: Vector of order (grid.N_core + grid.N_refl2) which specifies the mean void fraction in region k within both core and top reflector regions.
l: Structure of type cross_section_refl1_table for holding information on the cross sections for bottom reflector and core plate regions (see section 3.5.4).
l: Structure of type cross_section_fuel_table for holding information on the cross sections as a function of fuel temperature (T_f) and void fraction (alpha) for regions k situated within the core (see section 3.5.5).
l: Structure of type cross_section_refl2_table for holding information on the cross sections as a function of void fraction (alpha) for regions k within the top reflector (see section 3.5.6).
l: Density of liquid assumed in the table of nuclear cross sections [kg/ ${\mbox{m}}^3$ ].
l: Density of vapor assumed in the table of nuclear cross sections [kg/ ${\mbox{m}}^3$ ].
l: Structure of type block_tri_diag which holds the block-tri-diagonal matrix B in the eigenvalue problem given by Eq. (1.91).
l: Structure of type block_diag which holds the block-diagonal matrix C in the eigenvalue problem given by Eq. (1.91).
l: Block-vector (= matrix) of order ((grid.N_tot-1) x G) for holding the normalized flux solution at internal grid points (ie the solution at the grid.N_tot+1 grid points minus the two points on the boundary).
l: Matrix of order (grid.N_core x G) for holding information on the fission cross sections in core regions.
l: Vector of order grid.N_core+1 which specifies the linear heat generation rate at node k, q_k', for nodes within the core [W/m].
l: Simple variable (double) for holding the computed fundamental eigenvalue.
l: Simple variable which holds the factor or level of the computed normalized flux solution (corresponds to $\phi_{max}$ in (1.93) on p. ).
l: Number which specifies the convergence criterion for the power method iterations (see (2.4)).
l: Number which specifies the convergence criterion for the inverse iteration method (see (2.4)).

Next: struct grid Up: Data structures Previous: Simple data structures Contents Index

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