“Sealed Can technique” with LR-115 type II plastic track detector was used for the measurement of radon exhalation rate in the fly ash samples. Uranium concentrations have been measured through low level gamma ray spectroscopy. Activity concentration of uranium is found to vary from 5.6 to 11.0 ppm. Radon activity was found to vary from 182.9 18.6 to 262.9 22.3 and the exhalation rate lies in the range 62.3 6.2 to 95. 8.0 mBq m−2 h−1 whereas the radon mass exhalation rate varied from 2.1 0.2 to 3.6 0.3 mBq kg-1h-1. There seems a positive correlation between uranium concentration and radon exhalation rates. Results are compared with our earlier studies of different thermal power plants in India.