The easiest way to clean hydrogen from water is to use a chiller, with the temperature being varied depending on the hydrogen purity requirements. Example data are shown in Fig. \ref{129536}; to reach purity of 0.999 (by volume), the temperature must be as low as -46\(^{\circ}\)C.
The working principles of a deaerator are based on heating up feed water to saturation conditions in which all gas compounds are no longer water-soluble. The heating stream (steam) is mixed with cold stream (feed water), which can result in the water being contaminated by hydrogen and in hydrogen being present in the live steam. The impact of the presence of hydrogen in the steam turbine was analyzed earlier.

Mathematical model of the nuclear steam cycle