From 057d65c2b1a00cdfc0f298e3ceea7c47904c6ba5 Mon Sep 17 00:00:00 2001 From: Jon Walsh Date: Thu, 16 Apr 2015 01:54:18 -0400 Subject: [PATCH] update documentation to mention energy grids unionized by material --- docs/source/usersguide/input.rst | 14 +++++++++----- 1 file changed, 9 insertions(+), 5 deletions(-) diff --git a/docs/source/usersguide/input.rst b/docs/source/usersguide/input.rst index 79d66d2869..2ca93e3288 100644 --- a/docs/source/usersguide/input.rst +++ b/docs/source/usersguide/input.rst @@ -174,11 +174,15 @@ should be performed. It has the following attributes/sub-elements: ------------------------- The ```` element determines the treatment of the energy grid during -a simulation. The valid options are "nuclide" and "logarithm". Setting this -element to "nuclide" will cause OpenMC to use a nuclide's energy grid when -determining what points to interpolate between for determining cross sections -(i.e. non-unionized energy grid). Setting this element to "logarithm" causes -OpenMC to use a logarithmic mapping technique described in LA-UR-14-24530_. +a simulation. The valid options are "nuclide", "logarithm", and +"material-union". Setting this element to "nuclide" will cause OpenMC to use a +nuclide's energy grid when determining what points to interpolate between for +determining cross sections (i.e. non-unionized energy grid). Setting this +element to "logarithm" causes OpenMC to use a logarithmic mapping technique +described in LA-UR-14-24530_. Setting this element to "material-union" will +cause OpenMC to create energy grids that are unionized material-by-material and +use these grids when determining the energy-cross section pairs to interpolate +cross section values between. *Default*: logarithm