Kudankulam Nuclear Power Plant (or Koodankulam NPP or KKNPP) is a nuclear power station in Koodankulam in the Tirunelveli district of the southern Indian state of Tamil Nadu. Construction on the plant began on March 31, 2002, but faced several delays due to opposition from local fishermen. Unit -1 was synchronised with the southern power grid on October 22 , 2013. The original cost of the two units was ₹ 13,171 crore, but it was later revised to ₹ 17,270 crore ($2.6 billion). Russia advanced a credit of ₹ 6,416 crore ($0.97 billion) to both the units. In 2015, Nuclear Power Corporation Ltd (NPCIL) announced a price of ₹ 4.29/kW·h (6.4 ¢/kW·h) for energy delivered from Kudankulam nuclear power plant. The ground-breaking ceremony for construction of units 3 & 4 was performed on February 17, 2016. Work is expected to begin in April 2016. Due to operators and suppliers requirement to insure the two following units, at ₹39,747 crore (US$5.91 billion), the cost of units 3 & 4 is twice the cost of units 1 & 2.