Nuclear power - CO2-free energy
Nuclear power plays an important role in clean energy production. As a reliable, CO2-free energy source, it helps satisfy today’s increasing electricity needs while mitigating climate change. Over its lifecycle, nuclear power has a carbon footprint as low as wind, hydro and solar power.
Nuclear power produces electricity without releasing harmful emissions into the air.
Stable and reliable
Our nuclear power plants prevent shortages by providing an even and steady supply of electricity.
Multiple isolation, redundancy and extensive training ensure that nuclear power is safe.
Key numbers for 2017
Nuclear power totals for the year
megawatts (MW) of generation capacity
terawatt hours (TWh) of electricity produced
share of Fortum's total power generation
The world is changing
Climate change and the transition to a low-carbon energy system means that reliable, emission-free power generation is more important than ever. As a CO2-free energy production method, nuclear power is a key part of our strategy for a clean-energy future.
A steady source of electricity is critical, not least during periods of increased energy consumption. And unlike other CO2-free production methods, nuclear power generates electricity at a steady and high consistent rate regardless of weather conditions.
40 years of safety
Nuclear power is based on multiple isolation and parallel safety measures. Systematic maintenance and modernisation as well as training of personnel guarantee operation in line with current standards and strengthen safety-culture.
FAQ - Nuclear power
What is nuclear power?
Nuclear power production is based on the utilisation of the thermal energy generated by a controlled chain reaction. A nuclear power plant works much like a conventional power plant, but instead of burning e.g. coal, natural gas or peat, a nuclear power plant uses uranium as a source of energy.
How does nuclear power work?
A nuclear power plant uses heat from a nuclear reaction to create high pressure steam which is put through a turbine to generate electricity. Light water reactors, such as the pressure water reactors at Loviisa nuclear power plant, use enriched uranium as fuel.
What is nuclear energy used for?
It is mainly used to produce electricity, but heat generated by the nuclear reaction can also be used to provide heating for homes in a residential area (district heating).
Is nuclear power safe?
We have been safely operating the Loviisa nuclear plant for over 40 years. Nuclear safety is based on multiple isolation and parallel safety measures. Systematic maintenance and modernisation as well as training of personnel guarantee operation in line with current standards and strengthen safety-culture.
Light water reactors, such as the pressure water reactors at Loviisa NPP, are simple in their basic characteristics and inherently stable. Their natural safety characteristics, which are based on physical feedback loops that moderate the increase of power output, together with the basic design of the reactors make the uncontrollable increase of reactor power output impossible. Light water reactors are very suitable for energy production, and they have proven safe and reliable, which explains their popularity. For these reasons, the further development and construction of new nuclear power plants has mainly focused on light water reactor technology.
Nuclear and the environment
The main environmental impact of nuclear power is related to building the plant, fuel procurement and the thermal load of cooling water discharged into the sea during operation. Nuclear power is an effective way to produce electricity with minimal effect on the environment. When reviewing the entire production lifecycle, the climate impact of nuclear power is similar to that of wind, solar or hydropower.