Thermal utilization factor from macroscopic absorption cross sections
=====================================================================

Thermal utilization factor can be found using the macroscopic absorption cross section
in the fuel and the total macroscopic absorption cross section in the reactor.

**Links:**

#. `ScienceDirect <https://www.sciencedirect.com/topics/engineering/thermal-utilisation-factor>`__.
#. `NuclearPower <https://www.nuclear-power.com/nuclear-power/reactor-physics/nuclear-fission-chain-reaction/thermal-utilization-factor/>`__.
#. `Wikipedia, second row in table <https://en.wikipedia.org/wiki/Six_factor_formula>`__.

.. py:currentmodule:: symplyphysics.laws.nuclear.thermal_utilisation_factor_from_macroscopic_absorption_cross_sections

.. py:data:: macroscopic_fuel_absorption_cross_section

    :attr:`~symplyphysics.symbols.nuclear.macroscopic_cross_section` of absorption in the fuel.

Symbol:
    :code:`Sigma_af`

Latex:
    :math:`\Sigma_\text{a}^\text{f}`

Dimension:
    :code:`1/length`


.. py:data:: macroscopic_total_absorption_cross_section

    Total :attr:`~symplyphysics.symbols.nuclear.macroscopic_cross_section` of absorption.

Symbol:
    :code:`Sigma_a`

Latex:
    :math:`\Sigma_\text{a}`

Dimension:
    :code:`1/length`


.. py:data:: thermal_utilisation_factor

    :attr:`~symplyphysics.symbols.nuclear.thermal_utilization_factor`.

Symbol:
    :code:`f`

Latex:
    :math:`f`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`f = Sigma_af / Sigma_a`


    Latex:
        .. math::
            f = \frac{\Sigma_\text{a}^\text{f}}{\Sigma_\text{a}}