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    Default INS Arihant: First Indian Nuclear Submarine

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    INS Arihant (S-73) is the lead ship of India's Arihant class of nuclear-powered submarines. The 5,0006,000 tonne vessel was built under the Advanced Technology Vessel (ATV) project at the Ship Building Centre in Visakhapatnam.

    The INS Arihant is to be the first of the expected five in the class of submarines designed and constructed as a part of the Indian Navy's secretive Advanced Technology Vessel (ATV) Project. The submarine is reported to be similar to the Russian Charlie-II class submarine, which India leased from the Soviet Union between 1988 and 1991.

    The vessel will be powered by an 85 MW pressurized water reactor with enriched uranium fuel. A land-based prototype of the reactor was first built at Kalpakkam and made operational in September 2006. Successful operation over a period of three years yielded the data that enabled the production version for Arihant.It was reported that a 80MW nuclear reactor was integrated into the hull of the ATV in January 2008.

    The hull for the vessel was built by L&T's Hazira shipbuilding facility. Tata Power built the control systems for the submarine.
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