Main techniques used for measurement of Heq in zirconium based alloys (being used as major reactor components for PHWRs) are differential scanning calorimetry, hot vacuum extraction-mass spectrometry and inert gas fusion/extraction technique. In this paper, experimental studies on hydrogen evolution from zirconium based alloys have been reported as a function of temperature using thermogravimetric analysis coupled with evolved gas analysis. The present work is oriented towards studying the extraction characteristics of hydrogen in zirconium based matrices.