National Transmission System (NTS) operational limits depending on the Line Pack (LP) [the line pack is the actual quantity of gas existing at a certain moment in the TRANSGAZ gas transmission pipeline system]:
- NTS optimum status: LP = 55,0 ÷ 58,0 mil.Sm3 = 589.160.000 ± 621.296.000 kWh
- NTS normal status: LP is comprised between 50,0 ÷ 55,0 mil.Sm3 = 535.600.000 ± 589.160.000 kWh or LP is comprised between 58,0 ÷ 61,0 mil.Sm3 = 621.296.000 ± 653.432.000 kWh
- NTS pre-alert status: LP is comprised between 45,0 ÷ 50,0 mil.Sm3 = 482.040.000 ± 535.600.000 or LP is comprised between 61,0 ÷ 63,0 mil.Sm3 = 653.432.000 ± 674.856.000 kWh
- NTS alert status: LP < 45.0 mil.Sm3 = 482.040.000 or LP > 63,0 mil.Sm3 = 674.856.000 kWh
The operational limits are updated with the NTS transmission infrastructure developments and the need to implement new transmission scenarios.
Note: the values in energy units correspond to the annual average gross calorific value (at the NTS entry points) related to the calendar year 2019: GCV = 10.712 kWh/Sm3.