The enthalpy relaxation of amorphous selenium was studied using fast scanning calorimeter, where the heating/cooling rates up to 10,000 K s(-1) were used. The observed relaxation effects were compared with the measurements done by classical differential scanning calorimetry. Description of the data and prediction of the relaxation behavior using the Tool-Narayanaswamy-Moynihan model is discussed. (C) 2014 Elsevier B.V. All rights reserved.