Merge pull request #1599 from paulromano/energy-dep-fixes

Two fixes for energy deposition calculations
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Amanda Lund 2020-07-04 18:18:50 -05:00 committed by GitHub
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14 changed files with 173 additions and 93 deletions

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@ -12,19 +12,18 @@ is deposited for a specific reaction is referred to as
"heating numbers" and can be computed using a program like NJOY with the
``heatr`` module.
These heating rate is the product of reaction-specific coefficients and
a reaction cross section
The heating rate is the product of reaction-specific coefficients and a reaction
cross section
.. math::
H(E) = \phi(E)\sum_i\rho_i\sum_rk_{i, r}(E),
and has units energy per time, typically eV / s.
Here, :math:`k_{i, r}` are the KERMA (Kinetic Energy Release in Materials)
[Mack97]_ coefficients for reaction :math:`r` of isotope :math:`i`.
The KERMA coefficients have units energy :math:`\times` cross-section, e.g.
eV-barn, and can be used much like a reaction cross section for the purpose
of tallying energy deposition.
and has units energy per time, typically eV/s. Here, :math:`k_{i, r}` are the
KERMA (Kinetic Energy Release in Materials) [Mack97]_ coefficients for reaction
:math:`r` of isotope :math:`i`. The KERMA coefficients have units of energy
:math:`\times` cross-section (e.g., eV-barn) and can be used much like a reaction
cross section for the purpose of tallying energy deposition.
KERMA coefficients can be computed using the energy-balance method with
a nuclear data processing code like NJOY, which performs the following
@ -56,11 +55,11 @@ broken up into the following categories:
- :math:`E_{\beta}` - energy of released :math:`\beta` particles
- :math:`E_{\nu}` - energy of neutrinos
These components are defined in MF=1,MT=458 data in a standard ENDF/B-6 formatted
file. All these quantities may depend upon incident neutron energy,
but this dependence is not shown to make the following demonstrations cleaner.
As neutrinos scarcely interact with matter, the recoverable energy from
fission is defined as
These components are defined in MF=1, MT=458 data in a standard ENDF-6 formatted
file. All these quantities may depend upon incident neutron energy, but this
dependence is not shown to make the following demonstrations cleaner. As
neutrinos scarcely interact with matter, the recoverable energy from fission is
defined as
.. math::

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@ -149,6 +149,16 @@ Geometry and Visualization
Miscellaneous
-------------
- Shikhar Kumar, Benoit Forget, and Kord Smith, "`Stationarity Diagnostic using
Functional Expansion Tallies
<https://doi.org/10.1016/j.anucene.2020.107388>`_", *Ann. Nucl. Energy*,
**143**, 107388 (2020).
- T. Eade, B. Colling, J. Naish, L. W. Packer, and A. Valentine, "`Shutdown dose
rate benchmarking using modern particle transport codes
<https://doi.org/10.1088/1741-4326/ab8181>`_, *Nucl. Fusion*, **60**, 056024
(2020).
- Jiankai Yu, Qiudong Wang, Ding She, and Benoit Forget, "Modelling of the
HTR-PM Pebble-bed Reactor using OpenMC", *Trans. Am. Nucl. Soc.*, **122**,
643-646 (2020).