Concept

Atucha Nuclear Power Plant

The Atucha Nuclear Complex, or Atucha Nuclear Power Plant, is the location for two adjacent nuclear power plants in Lima, Zárate, Buenos Aires Province, about from Buenos Aires, on the right-hand shore of the Paraná de las Palmas River. Both are pressurized heavy-water reactors (PHWR) employing a mixture of natural uranium and enriched uranium (0.85% of 235U), and use heavy water for cooling and neutron moderation. The other currently operating nuclear power plant in the country Embalse Nuclear Power Plant is also a natural uranium fueled PHWR but of the Canadian CANDU 6 type rather than the Siemens provided type used at Atucha. Atucha I was started in 1968 and began operation in 1974; it was the first nuclear power plant in Latin America. On 25 March 1973, before its completion, the plant was temporarily captured by the People's Revolutionary Army who stole a FMK-3 submachine gun and three .45 caliber handguns. When they retired they had a confrontation with the police, injuring two police officers. It has a thermal power of 1,179 MWth, and generates 357 MWe of electricity, which is delivered at 220 kilovolts to the Argentine Interconnection System, supplying about 2.5% of the total electricity production (2005). Atucha II is a natural uranium fueled reactor, which construction started in July 1981 under a contract with Siemens, but was halted in 1994. It was planned to have a much higher power (thermal power approx. 2,000 MW, electrical 750 MW) than Atucha I. At the time when it was started, it had the largest reactor pressure vessel of any nuclear power plant worldwide. The total cost as of 2006 was estimated at US3.8billion,orabout3.8 billion, or about 5500/kWe. Atucha II like Atucha I before it is one of only a handful of heavy water reactors of a type other than the CANDU-type or the related IPHWR-type ever built. Prior to the EPR it was the last nuclear power plant built by Siemens. Partly as a response to the energy shortage caused by natural gas crisis of 2004, the issue of Atucha II was taken up by the Argentine government.

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