Regular and adjoint, inhomogeneous and homogeneous (keff and eigenvalue search) problems subject to vacuum, reflective, white, or source boundary conditions are solved. TRIDENT solves the two-dimensional, multigroup transport equations in rectangular (x-y) and cylindrical (r-z) geometries using a regular triangular mesh.

Also generated is the input to the program PLOT. The following points are taken up: program concept and characteristics regions layers meridians (offset, circular arc, ellipse) rays common characterstics - rays and meridians, ZONE input description output files examples and program availability. The mesh that is generated can be used as input to any two dimensional as well as any axisymmetrical structure program. Node points defining the outside boundary are generated for more » slide lines and to describe pressure boundary conditions. The zones generated are quadrilaterals or triangles defined by four node points in a counterclockwise sequence.

The node points are defined in terms of the x and y coordinates in a global rectangular coordinate system. The order of march can be chosen so that the minimum bandwidth is obtained. The geometry is subdivided into a mesh of quadrilateral and triangular zones arranged sequentially in an ordered march through the geometry.

The ZONE computer program is a finite element mesh generator that produces the nodes and element description of any two-dimensional geometry.

Finite element fortran program examples