Vattenfall aB GeneRatIOn nORDIC CeRtIfIeD enVIROnmental ...

3 Environmental performance BASEd on LCA
The conclusion is that the flows excluded from Core process and Upstream process contribute
less than 1 % to reported emission categories.
Downstream process
Downstream process comprises construction, operation and dismantling of the power
networks as well as the distribution losses in terms of the extra generation necessary as
compensation.
No data gaps have been reported in the documentation of the selected generic data used
for construction and dismantling of the networks.
Operational data represent the conditions in the Vattenfall power network in the late nineties
and comprise fuels and emissions from clearing of power lanes, and from transportation
during maintenance and inspections, consumption of oils, and specific emissions from
pylons. There are more underground cables and less overhead power lines today and the
latter require more maintenance for example in connection with clearing of power lanes and
repair related to storms. Hence used data for operation of the networks are conservative.
For included processes (excluding gravel, sand, soil, water, and energy resources) all resource
flows from nature aggregate to app. 1,0 g/kWh electricity. The sum of all identified
flows not tracked from the cradle is 95 %
Ozone-depleting gases >95 %
Acidifying substances >95 %
Substances contributing to ground-level ozone >95 %
Eutrophying substances >95 %
© Vattenfall AB Generation Nordic 2008
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