From ad53071fc417085cfa3cc3639a03c3c7b8ccffc7 Mon Sep 17 00:00:00 2001 From: Paul Romano Date: Mon, 19 Mar 2012 10:43:27 -0400 Subject: [PATCH] Updated documentation for batches and energy_grid. --- docs/source/usersguide/input.rst | 31 +++++++++++++++++++++++++------ 1 file changed, 25 insertions(+), 6 deletions(-) diff --git a/docs/source/usersguide/input.rst b/docs/source/usersguide/input.rst index e213d65c48..55072f24fa 100644 --- a/docs/source/usersguide/input.rst +++ b/docs/source/usersguide/input.rst @@ -307,16 +307,23 @@ settings.xml file. The ``criticality`` element indicates that a criticality calculation should be performed. It has the following attributes/sub-elements: - :cycles: - The number of total fission source iterations. + :batches: + The total number of batches, where each batch corresponds to multiple + fission source iterations. Batching is done to eliminate correlation between + realizations of random variables. *Default*: None + :generations_per_batch: + The number of total fission source iterations per batch. + + *Default*: 1 + :inactive: - The number of inactive fission source iterations. In general, the starting - cycles in a criticality calculation can not be used to contribute to tallies - since the fission source distribution and eigenvalue are generally not - converged immediately + The number of inactive batches. In general, the starting cycles in a + criticality calculation can not be used to contribute to tallies since the + fission source distribution and eigenvalue are generally not converged + immediately. *Default*: None @@ -353,6 +360,18 @@ default. This element has the following attributes/sub-elements: *Default*: 1.0 +``energy_grid`` Element +----------------------- + +The ``energy_grid`` element determines the treatment of the energy grid during a +simulation. 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). To use a unionized +energy grid, set this element to "union". Note that the unionized energy grid +treatment is slightly different than that employed in Serpent. + + *Default*: union + ``entropy`` Element -------------------