  Within the framework of QED theory at finite temperature the thermal
radiative corrections to spontaneous one-photon transition rates in hydrogen
atom are investigated. The radiative one-loop self-energy corrections are
described in the thermal case. Closed analytical expressions are derived and
their numerical calculations for the spontaneous decay rate of the $ 2p $ state
are carried out. Dominance of thermal radiative corrections to spontaneous
Ly$_{\alpha} $ decay rate over ordinary induced transition rate up to
temperatures $ T < 6000 $ K is demonstrated.
