openmc.Lattice

class openmc.Lattice(lattice_id=None, name='')

A repeating structure wherein each element is a universe.

Parameters:

• lattice_id (int, optional) – Unique identifier for the lattice. If not specified, an identifier will automatically be assigned.
• name (str, optional) – Name of the lattice. If not specified, the name is the empty string.

Variables:

• id (int) – Unique identifier for the lattice
• name (str) – Name of the lattice
• pitch (Iterable of float) – Pitch of the lattice in each direction in cm
• outer (openmc.Universe) – A universe to fill all space outside the lattice
• universes (Iterable of Iterable of openmc.Universe) – A two- or three-dimensional list/array of universes filling each element of the lattice

get_all_cells()

Return all cells that are contained within the lattice

Returns:cells – Dictionary whose keys are cell IDs and values are Cell instances Return type:collections.OrderedDict

get_all_materials()

Return all materials that are contained within the lattice

Returns:materials – Dictionary whose keys are material IDs and values are Material instances Return type:collections.OrderedDict

get_all_nuclides()

Return all nuclides contained in the lattice

Returns:nuclides – Dictionary whose keys are nuclide names and values are 2-tuples of (nuclide, density) Return type:collections.OrderedDict

get_all_universes()

Return all universes that are contained within the lattice

Returns:universes – Dictionary whose keys are universe IDs and values are Universe instances Return type:collections.OrderedDict

get_unique_universes()

Determine all unique universes in the lattice

Returns:universes – Dictionary whose keys are universe IDs and values are openmc.Universe instances Return type:collections.OrderedDict