Thermal non-leakage probability from diffusion area and geometric buckling
==========================================================================

Thermal non-leakage probability can be found from the diffusion area of thermal neutrons
and geometric buckling.

**Links:**

#. `NuclearPower <https://www.nuclear-power.com/nuclear-power/reactor-physics/nuclear-fission-chain-reaction/thermal-non-leakage-probability/>`__.
#. `Wikipedia, last row in table <https://en.wikipedia.org/wiki/Six_factor_formula>`__.

.. py:currentmodule:: symplyphysics.laws.nuclear.thermal_non_leakage_probability_from_diffusion_length

.. py:data:: thermal_diffusion_area

    Thermal :attr:`~symplyphysics.symbols.nuclear.neutron_diffusion_area`.

Symbol:
    :code:`L_th^2`

Latex:
    :math:`L_\text{th}^2`

Dimension:
    :code:`area`


.. py:data:: geometric_buckling

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

Symbol:
    :code:`B_g^2`

Latex:
    :math:`B_\text{g}^2`

Dimension:
    :code:`1/area`


.. py:data:: thermal_non_leakage_probability

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

Symbol:
    :code:`P_TNL`

Latex:
    :math:`P_\text{TNL}`

Dimension:
    :code:`dimensionless`


.. py:data:: law

    :code:`P_TNL = 1 / (1 + L_th^2 * B_g^2)`


    Latex:
        .. math::
            P_\text{TNL} = \frac{1}{1 + L_\text{th}^2 B_\text{g}^2}