From 9c8e22add86b84f334999e7a160dbbe0ad1caa9c Mon Sep 17 00:00:00 2001 From: Mikolaj Adam Kowalski Date: Thu, 19 Mar 2020 16:08:42 +0000 Subject: [PATCH] Add missing suggestion by @paulromano --- docs/source/usersguide/geometry.rst | 6 ++++-- 1 file changed, 4 insertions(+), 2 deletions(-) diff --git a/docs/source/usersguide/geometry.rst b/docs/source/usersguide/geometry.rst index f550327b24..f83af0b2f8 100644 --- a/docs/source/usersguide/geometry.rst +++ b/docs/source/usersguide/geometry.rst @@ -185,8 +185,10 @@ the :class:`openmc.Cell` class:: In this example, an instance of :class:`openmc.Material` is assigned to the :attr:`Cell.fill` attribute. One can also fill a cell with a :ref:`universe -` or :ref:`lattice `. If no fill -is provided to a cell, it will be filled with void by default:: +` or :ref:`lattice `. If you provide +no fill to a cell or assign a value of `None`, it will be treated as a "void" +cell with no material within. Particles are allowed to stream through the cell but +will undergo no collisions:: # This cell will be filled with void on export to XML gap = openmc.Cell(region=pellet_gap)