Temelín Nuclear Power Station

Temelín Nuclear Power Station
Name	Temelín Nuclear Power Station
Caption	The Temelín Nuclear Power Station
Country	Czech Republic
Location	Temelín, South Bohemian Region
Coordinates	49, 10, 48, N...
Owner	ČEZ Group
Construction began	1987
Commissioned	2002
Reactor type	VVER
Reactor supplier	Škoda Works
Power generation	2 x 1086 MW
Annual generation	~15 TWh

Temelín Nuclear Power Station is the largest nuclear power facility in the Czech Republic and a critical component of the nation's energy infrastructure. Located near the village of Temelín in the South Bohemian Region, it is operated by the state-owned utility ČEZ Group. The plant features two VVER-1000 pressurized water reactors and provides a significant portion of the country's domestic electricity production, contributing to energy security and low-carbon power generation.

History

The origins of the facility are rooted in the energy plans of the former Czechoslovak Socialist Republic, with initial construction commencing in 1987 under a Soviet-Czechoslovak cooperation agreement. The political changes following the Velvet Revolution and the subsequent dissolution of Czechoslovakia led to significant delays and a comprehensive safety review of the project. After a major redesign incorporating Western technology, notably from Westinghouse Electric Company, the first reactor was connected to the grid in 2000, with commercial operation beginning in 2002. The second unit followed in 2003, marking the completion of the current two-unit station.

Design and technology

The station utilizes two VVER-1000/320 type reactors, which are Soviet-designed pressurized water reactors. Key safety and control systems were extensively modernized with technology from Westinghouse Electric Company and other Western suppliers during the post-Cold War redesign. The turbine generators were supplied by Škoda Works. Each reactor has a gross electrical output of 1086 MWe, and the plant's design incorporates a containment building, multiple redundant safety systems, and a full-scope simulator for operator training located at the ČEZ University in Prague.

Operations and performance

As a baseload power plant, it consistently supplies over 30% of the Czech Republic's domestic electricity consumption. The facility is managed by ČEZ Group and undergoes regular refueling and maintenance outages, typically every 12-18 months per unit, to ensure reliability and safety. Its operational performance is monitored by the national regulator, the State Office for Nuclear Safety (SÚJB), and it has consistently achieved high capacity factors, comparable to other modern nuclear plants in Europe.

Safety and environmental impact

Safety oversight is conducted by the State Office for Nuclear Safety in accordance with standards set by the International Atomic Energy Agency and the European Union. The plant's design includes robust containment structures, emergency core cooling systems, and severe accident management guidelines. Compared to fossil fuel generation, its operation prevents the emission of millions of tons of carbon dioxide annually. The plant manages its radioactive waste through on-site storage, with spent fuel destined for a deep geological repository planned by the Radioactive Waste Repository Authority.

Public perception and controversy

The project has been a subject of sustained political and environmental debate since its inception. Major protests, often supported by Austrian anti-nuclear groups and activists like Josef Vavroušek, occurred during its construction and early operation. The governments of Austria, particularly under Chancellor Wolfgang Schüssel, have repeatedly raised diplomatic objections, citing proximity to the border. Domestic support for the plant has grown over time, bolstered by energy security concerns, though opposition persists among Czech environmental organizations such as Hnutí Duha.

Future developments

Plans for expanding the facility with additional reactors have been discussed for years. ČEZ Group has secured a location permit for two new units and is evaluating potential technology vendors, including Westinghouse Electric Company, Électricité de France (EDF), and Korea Hydro & Nuclear Power. The final investment decision is contingent on government energy policy, financing models including potential support from the European Commission, and long-term electricity market conditions. The existing units are currently licensed for operation until the 2040s.

Category:Nuclear power stations in the Czech Republic Category:Buildings and structures in the South Bohemian Region Category:ČEZ