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Merge branch 'develop' into python-api-pr

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Paul Romano 2015-04-16 10:18:24 -05:00
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docs/source/usersguide/input.rst
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@ -174,11 +174,15 @@ should be performed. It has the following attributes/sub-elements:
-------------------------
The ``<energy_grid>`` 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