[en] The article deals with the factors impeding the development of radiative condensation instability which results in a strong poloidal radiation as symmetry at the tokamak periphery (MARFE) when radiative region is separated from limiter surface. A strong decrease of radiation intensity when plasma temperature drops lower a certain specific value is proposed as a cause of instability stabilization. The calculations were performed in the Dreik model with an appropriate modification of the function describing impurity radiation. It is shown that radiation separation from magnetic surface (corresponding) to limiter vertex) significantly increases the threshold of axially asymmetric instability mode. There is a region of parameters where MARFE formation is impossible