Vattenfall aB GeneRatIOn nORDIC CeRtIfIeD enVIROnmental ...

3 Environmental performance BASEd on LCA
0,0040
0,0035
0,0030
SO 2 emissions, total of 0,0063 g/kWh
(Core process 0,0000012 g/kWh)
SO 2 g/kWh
0,0025
0,0020
0,0015
0,0010
0,0005
0
Upstream process
Core process
Core process –
infrastructure
Downstream process
Downstream process –
infrastructure
Downstream –
distribution losses
3.3.3.2 Emissions of greenhouse gases
4,5
4,0
3,5
Emissions of greenhouse gases, total of 6,0 g CO 2 -eq./kWh
(Core process 0,020 g CO 2 -eq./kWh)
g CO 2 -eq./kWh
3,0
2,5
2,0
1,5
1,0
0,5
0,0
Upstream process
Core process
Core process –
infrastructure
Downstream process
Downstream process –
infrastructure
Downstream –
distribution losses
The green portion of the core process infrastructure illustrates the emissions due to inundation
of land. Emissions of greenhouse gases with system boundaries corresponding
to the Greenhouse Gas Protocol Scope 1, i.e. the part of the lifecycle where Vattenfall
has management control is 0,018 g CO 2 /kWh.
Carbon dioxide is the dominating greenhouse gas, contributing 96 %.
Core process: About 0,39 % of the total emissions, emanating mainly from inspection
trips during operation and incineration of operational waste.
Core process – infrastructure: Emissions of CO 2 from inundated land contributes 52 %.
Damming causes inundated land to release organic matter, which is decomposed to CO 2
when subjected to oxygen in the water. Because the reservoirs are deep and the climate
cool, no methane is formed. The new biomass generated in the water consumes CO 2 .
The net effect, i.e. emissions due to decomposing of organic matter minus the binding in
© Vattenfall AB Generation Nordic 2008
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