Waste management at the construction site

During the construction phase, management of construction waste will be arranged in accordance with the environmental guidelines in order to minimize the impacts of the waste and its treatment on the environment.

The primary objective is to reduce the amount of waste that is generated. The secondary option is to utilize waste in new applications and in the production of materials or energy. The last option is to appropriately dispose of the waste in a landfill site.

Construction waste management is based on efficient sorting of waste at the site of its generation, as well as on uniform and efficient instruction of the various parties and companies operating at the plant site on appropriate waste management procedures.

Waste generated during construction will be appropriately sorted and recycled, or utilized in energy production as far as possible. The earth-moving, excavation, and dredging masses generated during the construction phase will be utilized, as far as possible, in various on-site filling and levelling operations. The handling, storage, and transportation of hazardous waste will be arranged in accordance with the regulations.


85 % utilization target in construction waste management

During 2016, waste management was small scale because the construction work at the plant site was still at an early stage. A temporary waste collection point was taken into use to emphasize construction waste management. Before that, each contractor has been responsible for their own waste management according to the instructions of sorting the construction waste.

The majority of waste from the construction site consists of normal construction waste in different categories of waste (metal, wood, concrete, rock, energy mixed construction waste, bio waste, paper, cardboard, glass and WEEE).

Our target of 85 % of construction waste fractions to be utilized as material or energy was exceeded.


Waste

During 2016, a total of 491 metric tons of waste was generated at the Hanhikivi 1 construction site. The waste formed as a result of the construction of infrastructure and auxiliary buildings is presented in the below table. This amounts to 42 % of all waste generated at the plant site.

In addition, 259 metric tons of waste was generated from the demolition of old buildings and cottages at the Hanhikivi headland. This comprises 53 % of the total amount of waste.

 

Of demolition waste, 88 % was wood, concrete and energy waste, which was utilized as material or energy.

The remaining 5 % (24 metric tons) of the total amount of waste was hazardous waste, which includes e.g. oily stone material, bilge water, waste oil, batteries, paints and solvents.

Construction waste 2016 Metric tons (t) % of waste
Wood waste 132 64 %
Energy waste 50 24 %
Concrete and brick waste 14 6 %
Landfill construction waste 2 1 %
Other 10 5 %

Construction waste generated at the Hanhikivi 1 site in 2016 broken down by type and percentage. Category “Other” includes e.g. metal waste, paper, cardboard, bio waste and waste electrical and electronic equipment. The fraction of waste, which was generated from demolition of cottages in Hanhikivi headland (259 tons) is not included in the table. In addition, the amount of hazardous waste (24 tons) is not included in the table, since distinction between the fraction of hazardous waste generated from construction work or demolition work is not made.


Drainage water treatment

RAOS Project began excavation works of the reactor pit area in spring 2016, and by the end of the year reached the level of -2.0 meters. A total of 58447 m3 of drainage water from the reactor pit was treated with temporary container settling, after which it was discharged into the sea. Water from the reactor pit caused temporary turbidity of sea water near the discharge point. Water quality was monitored by taking monthly samples and turbidity of sea water was visually monitored.   

Drainage water is visually monitored also at Fennovoima’s excess soil area. Samples of the drainage water are taken every three years, next time in 2018. The first water samples were taken when the excess soil area was taken into use in 2015. Ditch expansions and small rock dams have been constructed, which delay the water flow and allow particles to settle from the drainage water.

During 2016, Fennovoima has built a comprehensive ditch system to the construction site to manage and collect the accumulated storm water. The ditches direct the storm water to the sea. Fennovoima has also built a storm water ditch outside the plant site to Puustellintie to ease the accumulation of melt water during spring time. The ditch has no connection to the sea directly, only during high tide.