The Heavy Water Board (HWB), an industrial unit of the Department of Atomic Energy (DAE), Government of India is engaged in the production of heavy water and specialty materials required by DAE for supporting the Indian Nuclear Power Programme (INPP).HWB through its four operating plants has ensured self-sufficiency in the availability of heavy water for pressurized heavy water reactors and has also exported heavy water.The mandate of HWB has been enlarged to include the production of