visiting the control room in 2019 The ANPP complex consists of two units. The first unit was activated on 22 December 1976, and the second on 5 January 1980. Following public pressure after the
Spitak Earthquake in 1988, the
Council of Ministers of the Soviet Union decided to shut down the existing two units. After the fall of the
USSR, Armenia had a period of energy scarcity and the government decided to reopen the plant. Ahead of the reopening, the
Armenian government invited leading international companies to discuss and recommend solutions for potential earthquakes. After lengthy discussions, they developed a solution with Russian help and subsequently unit 2 restarted on 5 November 1995, six years after being shut down. This resulted in large increases in the Armenian generation capacity, allowing power to be used day and night.
Unit 2 developments The
EU reportedly had classified the
VVER 440 Model V230 light-water-cooled reactors as the "oldest and least reliable" category of all the 66 Soviet reactors built in
Eastern Europe and the former
Soviet Union. However the
IAEA has found that the Metsamor NPP has adequate safety and can function beyond its design lifespan. In December 2008, the Armenian government's progress in meeting international safety standards regarding its use of nuclear energy at the Metsamor NPP was praised by
Council on Nuclear Energy Safety Chairman Adolf Birkhofer, who also praised the overall development of the energy system in the country. In the wake of Japan's
2011 Fukushima nuclear crisis, the combination of design and location of Metsamor was again claimed to make it among the most dangerous nuclear plants in the world. The Metsamor power station is one of the few remaining nuclear reactors of its kind that were built without primary containment structures. Armenian authorities and nuclear experts have also dismissed the possibility of a repeat of Fukushima, citing numerous safety upgrades the plant has received since one of its reactors was restored into operation in 1995. In October 2015 a life extension of unit 2 was agreed, mostly funded with a loan from Russia, permitting it to operate until 2026. In August 2021 the reactor's pressure vessels underwent thermal annealing procedure by
Russia's Federal Agency for Atomic Energy (Rosatom), with the goal to extend its service life until 2026. The generating capacity was also increased to 440 MW in a $40 million deal. In December 2024, after discussions by an Armenian-Russian intergovernmental commission, a decision was made to extend the life of the plant until 2036.
Discussions on possible third unit On 23 April 2007 Director
Sergei Kiriyenko of Rosatom met with Armenia's Energy Minister
Armen Movsisyan and Ecology Minister,
Vardan Ayvazyan, where the Russian side indicated Moscow's willingness to help Armenia build a new nuclear power plant, in the event that Armenian officials opted to head in that direction. This statement was followed by former President
Robert Kocharyan's speech given to
Yerevan State University students on 27 April 2007 during which he said that serious work on the fate of Armenia's atomic energy is underway and practical steps will be taken in this direction in 2008–2009. The president considered it desirable to construct a new nuclear power plant based on the existing infrastructures and new technologies. However, in his words, it is necessary to determine the amount needed and examine what impact it will have on rates. Robert Kocharyan said that in 2012–2013, active work will be carried out to build a new nuclear power plant and modernize the current one. Armen Movsisyan has also announced that a decision to build a new unit at the operating nuclear power plant to replace the one to be decommissioned has been taken. The new unit would support 1,000 MW, which would "not only meet the needs of Armenia and reduce the country's dependence on organic energy [gas, oil, etc.] considerably but will also have certain energy importance in the region." A feasibility study for building a new reactor at the Metsamor nuclear power plant is underway with the assistance of foreign specialists. This work is expected to be completed within 1–2 years. Another proposed idea would be to have the unit support 1,200 MW. The cost of the project will go upwards from $4 billion to 5.2-7.2 billion depending on the power of the plant. Armenian Deputy Minister of Energy and Natural Resources Areg Galstyan said that the construction of the new nuclear power plant may start in 2011. The new NPP was expected to be commissioned in 2017. On 29 November 2007, the Armenian government approved a plan to shut down the nuclear power plant, but gave no specific date. According to Energy Minister Armen Movsisyan, the shutdown could cost up to $280 million. In February 2009, the government announced a tender for a new 1000 MWe unit. In May 2009, Australian company Worley Parsons was chosen to administer the project, and a $460 million management contract was signed in June. Legislation providing for the construction of up to 1200 MWe of new nuclear capacity at Metsamor from one or more reactors was passed in June 2009. In December 2009, the government approved the establishment of JV Metzamorenergoatom, a 50-50 Russian-Armenian joint stock company set up by the Ministry of Energy and Natural Resources with Atomstroyexport, with shares offered to other investors. This will build a 1060 MWe AES-92 unit (with a VVER-1000 model V-392 reactor) with a service life of 60 years at Metsamor. In March 2010 an agreement was signed with Rosatom to provide the V-392 reactor equipment for it. In August 2010, an intergovernmental agreement was signed to provide that the Russian party will build at least one VVER-1000 reactor, supply nuclear fuel for it and decommission it. Construction was to commence in 2012 or early 2013 and is expected to cost US$5 billion. The customer and owner of new reactors, as well as electricity generated, will be Metzamorenergoatom, and Atomstroyexport will be the principal contractor. Armenia undertakes to buy all electricity produced at commercial rates, enabling investors' return on capital, for 20 years. Metzamorenergoatom is to fund not less than 40% of the construction, and early in 2012, Russia agreed to finance 50%. The latest date for commissioning is 2019–20. As of 2015, construction of a new nuclear unit was still being considered, though plans were delayed due to the Fukushima crisis. A medium power design of about 600 MWe is now the preferred option. In 2026, Armenia decided its new nuclear power plant will be a
small modular reactor, and proposals from Russia, United States, China, South Korea and France will be considered, with a final decision made by 2027. ==Reactors==