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As regards materials, Terna does not use raw materials but electrical equipment, wires and other elements that are combined to be used in the transmission service. The table below provides an overview of the principal materials in supplies used by Terna. The weight is calculated starting from the quantity used, from the average or typical weight of the single elements and from the proportion of materials contained. In some cases the elements are made of a single material (for example, insulators are made of 100% glass or ceramics, terminal boards of aluminium); in other cases an estimate was made of the main material (for example, copper accounts for 60% of the weight of an ATR transformer). At the moment, no information is available on the use of recycled material on the part of suppliers of the materials and equipment used (as regards the environmental criteria in the procurement process see the specific box in the section on Economic Responsibility.

MAIN MATERIALS IN SUPPLIES - Tonnes


2012 2011 2010
Porcelain 229 967 663
Polymeric 131 322 350
Copper 3,861 2,569 3,853
Aluminium 4,069 9,588 4,927
Steel 6,163 23,875 17,114
Glass 863 2,078 1,573
Dielectric oil 61 974 1,413
SF6 50 54 23

The quantities shown in the table reveal an overall reduction in materials purchased with the exception of copper. In particular the quantities of dielectric oil, which have fallen constantly, are in line with the trend of preferring the installation of SF6 equipment. The generalized drop in the consumption of materials is associated with less construction of new lines in 2012. A large proportion of the supplies purchased related to cable connections (in particular the Italy - Montenegro connection). The analysis of the main materials in cables is at the implementation stage and was therefore not yet available for the purposes of creating this table. In office work, the main consumable is paper.

PAPER CONSUMPTION - Tonnes


2012 2011 2010
FSC paper 52 70 83

Paper consumption refers to the quantity purchased. A trend is therefore not clearly identifiable and the changes in the three years relate mainly to stock management in certain territorial areas in 2011.

All the paper purchased since the end of 2009 has been made with TCF pulp – that is, Totally Chlorine Free – and certified by the FSC (Forest Stewardship Council www.fsc.org) – which guarantees that the forests providing the cellulose are managed in accordance with sustainability criteria from the point of view of both the environment and human rights.

Water is not used in the electricity transmission and dispatching production cycle. Normally water used – for hygienic uses, to clean offices and for cooling systems – comes from connections to the water main for civil uses. Consumption grew in the three years considered, in line with the increase in the number of stations managed (+9%)

In particular, the figure for 2012, which was higher than those recorded in previous years, was affected by:

  • much higher leakage (approximately 12% of total consumption shown in the table) at the Line Operating Group ( LOG) offices;
  • an improvement in data collection which made it possible to record exact consumption at a greater number of stations compared with previous years. This was possible thanks to constant monitoring of the MBI information system used in managing lines and stations. In fact, every month the system records the meter readings of the more than 460 Terna stations scattered around the whole country. 

WATER CONSUMPTION - Cubic metres


2012 2011 2010
Water withdrawal  219,311 176,525 184,979