The second reactor of the Kudankulam Nuclear Power Project (KKNPP) was on 29 August 2016 successfully synchronised to the Southern Power Grid situated at Abhishekapatti, Chennai. This marks the generation of electricity and its supply to the grid by the second reactor.
The Russian-designed VVER-1000 reactor of Kudankulam is now generating 245 MWe power to the southern grid from the second unit. Output from Kudankulam 2 is being divided between four states: Tamil Nadu, Karnataka, Kerala and Puducherry.
However, the unit will be shut down for a mandatory inspection of the turbine generator after a few days of operation. Generation of power will be raised to 250 MWe, 500 MWe, 750 MWe, 900 MWe and then 1000 MWe in stages.
At every stage, tests will verify the technical parameters mandated by the Atomic Energy Regulatory Board (AERB).
• Construction of the Kudankulam units began in 2002.
• Kudankulam 1 achieved first criticality in mid-2013, was connected to the grid in October 2013 and entered commercial operation in December 2014.
• Construction of Kudankulam 2 was completed in July 2015, and it was loaded with its first fuel in May 2016.
• Following the completion of safety tests, Nuclear Power Corporation of India Ltd (NPCIL) began the process of approaching criticality on 8 July 2016 by diluting neutron-absorbing boric acid in the primary coolant water.
• A controlled self-sustaining nuclear fission chain reaction was attained on 10 July 2016.
The Kudankulam units are India's first pressurized water reactors to enter operation and are the largest reactors in the country. The two Kudankulam units have been built by NPCIL and also commissioned and operated by NPCIL under IAEA safeguards, with supervision from Russian specialists.
The grid connection of Kudankulam 2 brings India's installed nuclear generating capacity to 6780 MWe. Kudankulam 2 is the second of two AES-92 VVER-1000 reactors supplied by Russia's Atomstroyexport under a Russian-financed contract.
Enriched uranium fuel for the entire life of the plant will supplied by Russia.
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