.. _section-5.3.6:

Check Valves
~~~~~~~~~~~~

|SAS| contains a simple check valve treatment in which the user
can specify the valve orifice coefficient as a function of coolant flow
rate. Every time step an orifice coefficient (:math:`G_2` in
:eq:`(5.3-35)`) is re-set using a user-supplied table of orifice coefficient vs.
normalized flow rate, with a flow rate normalized to its steady-state
value. Other than the variable orifice coefficient, a check valve is
treated the same as a pipe, as described in :numref:`section-5.3.3`.