Hanhikivi 1 is a project that contributes to combatting the climate change. The climate benefit of the Hanhikivi 1 materializes during the decades of electricity production without harmful greenhouse emissions. Before commissioning, Fennovoima's direct environmental impact is mostly related to the construction work carried out at the site.

We ensure that all work on the Hanhikivi headland is carried out in accordance with environmental legislation and the permit conditions, and that the environment and the wellbeing of the local residents are respected during construction work. Our ISO 14001 certified environmental management system is an important tool in this work. 

Management of the environmental impact at the Hanhikivi 1 construction site is based on proactive identification of environmental risks. We assess environmental risks for the Hanhikivi 1 construction site as a whole from the perspectives of environmental impact, legislation, and permit conditions. At this stage of the construction project, important environmental risks include chemical and oil leaks, the spread of turbidity in the sea, and noise during blasting. We update our risk register four times a year.

All contractors working in the project area comply with a comprehensive risk assessment and risk management procedure. Furthermore, everyone working at the project site must be aware of the special characteristics of the Hanhikivi headland’s natural environment, the access limitations in the area, as well as the environmental guidelines established for the construction site. 

Project area is monitored with care 

We monitor the progress of contracted work together with RAOS Project during weekly site monitoring rounds, and we assist the contractors in better management of environmental matters. We also perform monthly targeted environmental inspections that focus on matters such as fuel storage, oil spill prevention preparedness, or dust prevention methods. The authorities also carry out regular inspections of our procedures.

Environmental impact monitoring

There are extensive protected seashore meadows, overgrowing shallow bays, and gloe lakes, which have become isolated from the sea on the Hanhikivi headland. There is a Natura 2000 conservation area approximately two kilometers from the plant area. Areas of high natural value have been left outside the plant area already at the construction planning phase.

We monitor the state of the environment together with RAOS Project in accordance with a jointly agreed environmental monitoring program. In addition to the environmental monitoring required by the permit conditions, we also carry out voluntary monitoring of the environmental impact. This allows us to ensure that we have comprehensive knowledge of the state of the environment in the Hanhikivi headland.



Air quality No increased volume of dust outside the project area. We monitor the quality of the air, especially in close proximity to nature conservation areas.
Noise Noise was caused especially by piling work in the cooling water discharge area. The recommended values were exceeded several times, both during the day and at night. The average noise level at the different measuring points in 2019 was 30–68 dB (30–68 dB in 2018). A level of 30 dB corresponds to the sound of a whisper, and 65 dB corresponds to a normal speaking voice or laughter. 
Seawater quality No changes in water samples caused by construction activities.
Turbidity Monitoring revealed a natural increase in turbidity due to heavy rain and storms. The values exceeded five times the limit where work must be interrupted, but no water construction work was in progress at the time. Breakwaters that are currently under construction, a protective embankment built in the sea to prevent the spread of turbidity, and a protective curtain placed in the water limit the spread of turbidity from the construction area.
Fish stock Total fish catch, species-specific fish catches, and average lengths of the fish species were studied. On the basis of the data collected, no changes that were clearly caused by water construction work could be detected in the structure of the fish stock. The most significant detected change deviating from the reference area was a reduction in the average size of roach. The underlying reason may be that larger roaches that feed on the bottom have moved away from the area.
Oil and chemical leaks No significant oil or chemical leaks occurred in the project area.


Seashore meadows Spreading of reed beds in the seashore meadows was detected. Occurrences of Siberian primrose have declined. Due to this observation, the status of all occurrences will be studied in more detail when Siberian primrose flowers in 2020.
Gloe lakes Changes in the water level of a gloe lake were detected in August. An investigation and related actions were immediately initiated. According to the observations made, a nearby clarification basin could be the underlying reason behind the rise in water level. The use of the settling basin was discontinued and it will be retaken into use once we are sure that the natural water level fluctuation in the gloe lake has been ensured.
Relocated species No significant changes were detected during the studies. The number of moor frogs had slightly decreased from the previous years, but the change is assumed to be a result of the dry summer. Furthermore, the follow-up study was realized later in the summer than in the previous years.

Construction waste is utilized as energy or material 

Efficient sorting and recycling, as well as appropriate processing, are important parts of the management of the environmental impact of the waste generated on site. 

Most of the waste generated at the construction site is regular construction waste: metal, wood, concrete, rocks, biowaste, paper, cardboard, glass, or electrical and electronic waste. Our goals are to utilize 70% of our construction waste as materials and to utilize a total of 90% of our construction waste either as materials or in energy production.