Armenia’s nuclear sector is built around one operating reactor, yet that unit has national importance far beyond its size. Armenian Nuclear Power Plant Unit 2 at Metsamor supplies a substantial share of electricity, supports grid stability and limits dependence on fuel imports.
Armenia must keep an older plant operating safely while preparing a replacement suited to a relatively small power system. Closing Metsamor before new capacity is ready would increase dependence on gas-fired generation. Extending it without completing modernization and ageing-management work would create different risks. Nuclear policy is therefore a bridge between long-term operation and an unselected future reactor.
Metsamor Unit 2 Carries a Large Share of the Power System
The Armenian Nuclear Power Plant is located near Metsamor, west of Yerevan. Two Soviet-designed pressurized-water reactors were built at the site. Unit 1 entered service in the 1970s and is now permanently shut down. Unit 2 first connected to the grid in 1980 and remains Armenia’s only operating power reactor.
Both units were taken offline after the destructive 1988 Spitak earthquake. Armenia later faced severe electricity shortages following the Soviet collapse and regional disruptions, and Unit 2 returned to service in 1995.
Following modernization and uprating, the reactor has about 416 MW of net capacity. It supplied approximately 2,629 GWh in 2024, more than one-quarter of national generation. Its outages, maintenance schedule and eventual retirement therefore have immediate consequences for supply planning.
Nuclear power also diversifies a system otherwise heavily dependent on natural gas. Hydropower and expanding solar capacity contribute, but do not fully replace Metsamor’s continuous output. The plant is both a generator and an energy-security asset.
Life Extension to 2036 Is a Bridge, Not a Permanent Solution
Metsamor Unit 2 is operating under a licence that runs to September 2026. Armenia has launched a second long-term operation program intended to support an additional ten years of service, through 2036. The government views this period as necessary to avoid a supply gap while a replacement reactor is assessed, selected and built.
The extension follows years of equipment replacement and safety, electrical and cooling-system upgrades. A lengthy 2021 outage supported the first extension period and a capacity increase. In April 2026, the reactor entered another extended outage for modernization work supporting operation to 2036.
An International Atomic Energy Agency team completed a Safety Aspects of Long Term Operation review in October 2025. The mission found that the operator had made progress and that many activities were aligned with IAEA safety standards. It also identified further work involving ageing-management programs, equipment qualification for harsh environments and civil structures.
A licence extension is not merely administrative. It requires continuing technical justification, inspection, equipment replacement, regulatory review and evidence that safety programs remain effective as the plant ages.
The 2036 target gives Armenia time, but not an unlimited amount. Nuclear new-build projects often require many years for vendor selection, financing, licensing, site preparation, construction and commissioning. The replacement program must advance during the extension period rather than waiting until the final years of Metsamor’s operation.
Seismic Conditions Keep Safety at the Center of Nuclear Policy
Metsamor’s location in a seismically active region has shaped international discussion of the plant for decades. The 1988 earthquake remains part of Armenia’s national memory, and the reactor’s Soviet-era design has led neighboring countries and European institutions to question continued operation.
For Armenia, the response has been modernization rather than immediate closure. Seismic reassessments, equipment qualification and structural improvements have formed part of the safety program. The 2025 IAEA review specifically noted periodic examination of the plant’s seismic qualification program while also recommending continued attention to ageing management and civil structures.
The technical case for continued operation must be demonstrated through regulatory analysis, plant data, inspections and independent review. Armenia’s regulator must decide whether the evidence supports operation beyond September 2026 and under what conditions.
The plant’s strategic importance can complicate this process because the electricity system has a strong interest in keeping it available. Maintaining credible regulatory independence is therefore essential. Energy-security benefits cannot replace safety requirements, while safety planning must also recognize the national consequences of an unplanned or prolonged shutdown.
Armenia Has Chosen the SMR Path but Not Yet a Reactor
The government’s long-term objective is to replace Metsamor with new nuclear capacity. Earlier plans considered a large conventional reactor, but the cost and scale of such a project created major obstacles. A unit of around 1,000 MW would be very large relative to Armenia’s grid, making outages harder to manage and requiring extensive financing and system upgrades.
By March 2026, the Armenian government had publicly confirmed a decision to pursue small modular reactor technology. It is evaluating proposals from international partners and has not yet announced a final vendor, reactor design, financing structure or construction schedule.
Several smaller modules could be added in stages without placing one exceptionally large unit on the system. This may spread capital requirements and provide flexibility as solar generation expands.
Those advantages remain theoretical until a deployable design is selected. Armenia must compare technical maturity, fuel arrangements, waste requirements, construction risk, vendor support and total electricity cost, not only reactor size.
International partnerships also carry geopolitical consequences. Russia has played a central role in fuel supply, maintenance and the modernization of Metsamor. Armenia has simultaneously explored nuclear cooperation with the United States and other countries. Selecting a new reactor could determine fuel, service and technology relationships for many decades.
Waste, Workforce and Financing Will Determine Whether the Transition Works
The transition requires more than a reactor contract. Armenia must retain a trained workforce, strengthen the regulator and prepare future operators before a new unit enters service.
Spent fuel and radioactive waste remain long-term responsibilities. Additional operation and a future reactor will add to the inventory, so storage, eventual disposal and decommissioning finance must be integrated into replacement planning.
Financing may be the most difficult issue. Armenia’s electricity market is small, while nuclear projects require large upfront capital commitments. A workable plan may involve state support, export credit, vendor finance or an international partnership. Each option affects electricity prices, public debt and long-term dependence on the chosen supplier.
Armenia’s nuclear future is therefore defined by timing. Metsamor Unit 2 remains a critical source of electricity, and the planned extension to 2036 can protect energy security during the next decade. It cannot substitute for a replacement decision. The central test will be whether Armenia uses the extension period to move from technology review to a financed, licensed and constructible project that can enter service before the existing reactor reaches the end of safe operation.