Production of Radioisotopes In India Started Way Back In 1956 With Commissioning of 1 Mw Research Reactor Named As Apsara. the Production Capability Was Augmented In 1963 When 40 Mw Cirus Reactor Attained Its Full Rated Capacity. During the Early Seventies, a Strong Need Was Felt For Building Another Research Reactor With Higher Neutron Flux to Meet the Growing Demand of Radioisotopes.