NEC Role & Expectations DECC Competencies Emergency Alert Stage Status *The Network * The NEC is notified of any situation where there is the potential for a of Emergency gas supply emergency to develop and will request an emergency strategy ▼ Emergency (NEC) is to be prepared by National Grid. By NEC an independent body, free from the WHITE commercial BLACK interests of industry ▼ participants. * Assess the situation based on the National Grid emergency strategy *The NEC is Stage 1 and declare a Stage 1: "Potential Network Gas Supply Emergency" responsible under Declare * Make an assessment of the gas supply and demand situation using all safety legislation potential available information: for the coordination emergency of shippers and and invoke transporters 1 AMBER across the affected procedures parts of the gas Review network to effectiveness minimise the * Assess the situation based on the National Grid emergency strategy possibility of a gas Stage 2 and declare a Stage 2: (“Network Gas Supply Emergency”) supply emergency Invoke Stage 2 * Make an assessment of the gas supply and demand situation using all developing, and emergency available information. where one does mitigating develop, to * For specific actions see National Grid section. action minimise the safety including gas consequences in maximisation accordance with and/or Firm the requirements of Load the Gas Safety Shedding, and (Management) RED suspend Regulations 1996. National Grid Gas pls *The NEC is participation in responsible for OCM declaring a commercial Network Gas arrangements. Supply Emergency Review and authorising the effectiveness strategy proposed * Assess the situation based on the National Grid emergency strategy and by National Grid Stage 3 declare a Stage 3: (“Network Gas Supply Emergency”) NTS to resolve the Invoke Stages * Make an assessment of the gas supply and demand situation using all emergency 3 emergency available information. response *NEC is also * For specific actions see National Grid section. mitigating required to prepare action a Safety Case RED including demonstrating the allocation and arrangements that isolation, and are in and review actions to be taken effectiveness to prevent a gas supply emergency. Stage 4 *After the resolution of the Network Gas Supply Emergency, Stage 4 will The Safety Case ▼ be declared and actions to return the system to normal are implemented. Declare end of must be submitted Network Gas * The NEC will formally stand down when all the normal Unified Network to the HSE for their Supply Code commercial regime has been re-established and supplies have approval WHITE Emergency been restored. BLACK ▼
NEC Emergency Stage Role & Expectations DECC Alert Status Competencies of Emergency By NEC * The NEC is notified of any situation where there is the potential for a gas supply emergency to develop and will request an emergency strategy to be prepared by National Grid. ▼ WHITE ▼ BLACK *The Network Emergency (NEC) is an independent body, free from the commercial interests of industry participants. *The NEC is responsible under safety legislation for the coordination of shippers and transporters across the affected parts of the gas network to minimise the possibility of a gas supply emergency developing, and where one does develop, to minimise the safety consequences in accordance with the requirements of the Gas Safety (Management) Regulations 1996. *The NEC is responsible for declaring a Network Gas Supply Emergency and authorising the strategy proposed by National Grid NTS to resolve the emergency *NEC is also required to prepare a Safety Case demonstrating the arrangements that are in and actions to be taken to prevent a gas supply emergency. The Safety Case must be submitted to the HSE for their approval Stage 1 Declare potential emergency and invoke 1 procedures Review effectiveness * Assess the situation based on the National Grid emergency strategy and declare a Stage 1: "Potential Network Gas Supply Emergency" * Make an assessment of the gas supply and demand situation using all available information: AMBER Stage 2 Invoke Stage 2 emergency mitigating action including gas maximisation and/or Firm Load Shedding, and suspend National Grid Gas pls participation in OCM commercial arrangements. Review effectiveness * Assess the situation based on the National Grid emergency strategy and declare a Stage 2: (“Network Gas Supply Emergency”) * Make an assessment of the gas supply and demand situation using all available information. * For specific actions see National Grid section. RED Stage 3 Invoke Stages 3 emergency response mitigating action including allocation and isolation, and review effectiveness * Assess the situation based on the National Grid emergency strategy and declare a Stage 3: (“Network Gas Supply Emergency”) * Make an assessment of the gas supply and demand situation using all available information. * For specific actions see National Grid section. RED Stage 4 Declare end of Network Gas Supply Emergency *After the resolution of the Network Gas Supply Emergency, Stage 4 will be declared and actions to return the system to normal are implemented. * The NEC will formally stand down when all the normal Unified Network Code commercial regime has been re-established and supplies have been restored. ▼ BLACK ▼ WHITE