India's atomic energy programme has had some very distinctive achievements. It has enabled us to emerge as a nuclear weapon state (including nuclear submarine capability) while also delivering pressurized heavy water reactors (PHWRs) and associated nuclear fuel cycle technology that is commercially successful and is performing with global standards. India now operates 19 PHWRs of 220, 540 and 700 MWe (MegaWatt electric) unit sizes with 14 more 700 MWe units under construction in fleet mode.
We are also close to commissioning the 500 MWe prototype fast breeder reactor and its fuel cycle as the next step in our three-stage strategy, aimed at ensuring long-term energy security for India based on our vast thorium reserves, which are the largest in the world. Thorium is also the preferred fuel for high-temperature nuclear reactors required for producing cheaper clean hydrogen to meet industry needs.
India has only modest quantities of uranium, the only naturally available resource for obtaining fission energy.
This has necessitated our thrust towards converting thorium into uranium-233. The fissile material so generated can efficiently produce energy in situ or in a sustainable breeder cycle with thorium. In uranium reactors, use of thorium also enables advantages such as augmented accident tolerance and improved reactor parameters that augment safety and proliferation resistance. Further, in PHWRs, thorium can increase the fuel burn-up to the level of other water reactors reducing the spent fuel arising by a factor of seven.
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