[en] A study on radiation-induced dechlorination of hexachlorobenzene in alkaline ethanol solution was performed. At the beginning a higher efficiency for dechlorination has been found. The dechlorination is a chain reaction. The solubility of radiolytic products in ethanol-water (v/v 1:4) is higher than that of HCB in the same solvent. Hexachlorobenzene could be transferred into the solution and degraded partially if the soil contaminated by hexachlorobenzene was mixed with ethanol, then irradiated with γ-rays. (author)