Isotope and Radiation Application Division (IRAD) is dedicated to development of isotope techniques and radiation technology for applications in industry, hydrology and environment. Several radioisotope based techniques have been developed and applied in Indian industry for troubleshooting, measurement of hydrodynamic parameters, evaluation and validation of industrial process systems leading to significant revenue savings. The Division is also engaged in development of novel materials and processing of various industrial products for improving their property and value addition using electron beam and gamma radiation. IRAD has also developed unique expertise in adapting isotope hydrology techniques for water resources development and management. Several large-scale hydrological investigations have been carried out for identifying the source of recharge, contamination, flow dynamics and dating of groundwater in various parts of India leading to significant societal benefits.