[en] The hydrogen flows onto the TM-4 tokamak wall during a pulse the average recycling coefficients during a pulse, as well as the hydrogen flows into TM-4 chamber after completing a series of pulses, have been measured, hydrogen quantities accumulated in the wall as a function of the operating pulses number have been determined using thermal desorption technique. A simple diffusion model describing the hydrogen accumulation and release during tokamak operation is suggested. Surface recombination rates connected with radiation-indUced desorption and thermal desorption of hydrogen from the stainless steel are determined under the TM-4 tokamak operating conditions and within the limits of the model suggested. The obtained values of the surface recombination rates allow to predict the recycling coefficients with the pulse duration increase or the temperature variation, to calculate the hydrogen flows into the chamber, and also to estimate the wall penetrability to hydrogen