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 = 64.0 ÷ 67.0 mil.Sm3 = 686,656,000 ÷ 718,843,000 kWh
- NTS normal status: LP is comprised between 58.0 ÷ 64.0 mil.Sm3 = 622,282,000 ÷ 686,656,000 kWh or LP is comprised between 67.0 ÷ 70.0 mil.Sm3 = 718,843,000 ÷ 751,030,000 kWh
- NTS pre-alert status: LP is comprised between 52.0 ÷ 58.0 mil.Sm3 = 557,908,000 ÷ 622,282,000 or LP is comprised between 70.0 ÷ 72.0 mil.Sm3 = 751,030,000 ÷ 772,488,000 kWh
- NTS alert status: LP < 52.0 mil.Sm3 = 557,908,000 or LP > 72.0 mil.Sm3 = 772,488,000 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 2020: GCV = 10.729 kWh/Sm3.