
additional incentive not to dispose of them. Unfortunately,
we have not found solutions for all the materials we use,
such as synthetic materials used to make temporary
roadways on construction sites. We are in contact with
oursuppliers and look for partnerships to help reduce our
non-recyclable waste.
To maximise circularity we need insight in our material
usage in projects. Therefore we request material passports
in our tenders. This records all raw materials used in a
specific product, stating which include recycled and
recyclable material. This way, the passport provides
transparency of resource mix, and provides a basis to
increase the circularity of product components. Working
with our contractors, we aim to include a raw material
passport system in all our new tenders, giving us a
comprehensive view of circularity in our supply chain.
For both our non-recyclable waste and our virgin copper
use, we have made progress by working together with our
suppliers to obtain preliminary insights on the percentage
ofwaste that is non-recyclable and the percentage of virgin
copper, which will be included in the projects that have
been tendered in 2020. Unfortunately, as not all data is
available yet when this report is published, we will disclose
this information in our Additional CSR data document,
which we will update when the data is available.
Basedonour current insights from our previous year's
waste reporting related to a significant part of our
Germanoperation, our estimate is that around
60-75%ofthe copper we use is virgin copper and
around10-25% ofour waste is non-recyclable.
We also pursue innovations in underground cabling,
allowing us to increase the sustainability and circularity
ofthe materials used. An example is the innovative plastic-
insulated 525 kV underground cables for our SuedLink and
SuedOstLink projects. This is the first time these cables
have been used worldwide, setting new standards in
technology, and reducing environmental pollution. As well
asbeing fully recyclable, the cables can transmit significantly
more power than conventional 320 kV cable systems.
Thismeans that less cables are needed, allowing the route
to be narrower, with less civil engineering work required.
This significantly reduces the impact on the environment.
We are also researching the use of these more resource-
friendly and higher capacity cabling systems in our offshore
projects. Thisshould lead to a standardised cable system
that TenneT can use in the BalWin, (German North Sea) and
IJmuiden Ver (Dutch North Sea) projects as well as in future
projects with the same power and voltage. We have
reached agreements with eight cable manufacturers to
develop a new standard for a DC submarine 525 kV cable
system instead of the existing technology of 320 kV
standard. This new cable system will be required for our
2GW offshore grid connections in Germany and the
Netherlands, which will set a new standard for connecting
offshore wind farms (see Critical Infrastructure chapter).
Nature
Unfortunately, we have an unavoidable impact on nature
aswe build, maintain and operate our assets in the natural
landscape. However, we also aim to create positive
impacts, such as promoting biodiversity at our substations
and considering our impact on nature early in the process
ofrealising a project.By doing so, we ultimately aimto have
a zero net impact on nature.
Regarding our negative impacts on nature, we were unable
to meet our goals in 2020 as we aimed for a 17% reduction
of our 2019 oil leakages from cables (maximum of 1,529
litres). We reported 57 environmental incidents, which is a
bit more than the 50 incidents reported in 2019 and 5,391
litres of oil leaked from cables (1,842 litres in 2019), mainly
in the Western Netherlands. These cables are relatively old
and are therefore more prone to leakage, with great
difficulties to locate and repair leaks in time. Nevertheless,
we regret the amount of oil leaked and the negative impact
this had on the environment near our assets. We are
working on resolving these leakages and finding ways to
further improve in this area going forward.On the other
hand, we are pleased with the progress we made to create
more positive impact on nature. TenneT is involved in a
coalition called ‘Groene Netten’ comprised ofcompanies
that operate critical infrastructure in the Netherlands.
Together, the coalition members manage over 922 square
kilometres of ground and water with an impact on nature.
This is related to more than 800.000 kilometres
infrastructure. In 2020, Groene Netten has presented the
‘ecologische hoofdinfrastructuur’, a digital map which can
be used to work together and increase biodiversity in our
projects.Amongst other things, this has the potential to
bring together data such as biodiversity hotspots, ground
water levels and relevant GIS data to help identify
opportunities for biodiversity protection.
To achieve our ambitions, we created a nature roadmap,
which sets the targets for the coming year and our definition
of zero impact on nature. As part of this, we announced in
May 2019 a plan to promote biodiversity at all of our 468
high-voltage substations in the Netherlands and Germany,
especially as regards to protecting and increasing bird and
insect populations.
The plan builds on positive results from a pilot project at three
substations in the Netherlands, revealing that nature-friendly
2020 at
a glance
Performance
2020
Letter from
the Board
Supervisory
Board Report
Financial
statements
About
TenneT
Governance
and risk
management
Other
information
45
Integrated Annual Report 2020 - TenneT Holding B.V.