NEC Network Emergency Exercise - Exercise Prelude

2 Prelude  Review of the objectives of the exercise and actions taken  What was tested on each day of the exercise  Reporting  Next Steps and Contacts

3 Prelude – Industry Exercise Overall Objectives  Test the overall framework of Network Gas Supply Emergency procedures  Test communications and understanding across industry.  Ensure continuity and alignment of process.  Testing transporters E3 procedures Gas Act 1995 Network Code E/3 for detailed incident management E/1 Network Gas Supply Emergency procedure E/2 Local Gas Supply Emergency procedure NEC Safety CaseTransporters Safety Case Gas Safety (Management Regulations 1996

4 Highlights.  The scenario was a progressive Gas Deficit Emergency with multiple events over the two days.  Day One. Stage 1 Declaration  Formation of the Network Emergency Management Team  Communication with participants and System Operators  Emergency Interruption Stage 2 and Stage 3  Declaration and Communication  Suspension of National Grid’s participation on the OCM as Residual Balancer  NTS and LDZ VLDMC Firm Load shedding  Day Two Highlights. Completion of remaining Stage 3 Actions  Firm Load shedding of loads >25000 tpa NGSE Stage 4 Isolation.  Distribution Networks Isolation Plans NGSE Stage 5 Restoration.  NTS Restoration of Firm and Interruptible loads  Distribution Networks Restoration Plans

5 Emergency Arrangements NGSE Stages Normal Operations  Markets in normal operation  NG role of residual balancer  Normal level of reporting  Gas Balance Alert STAGE 1STAGE 2  Suspend National Grids residual balancing role  Maximise beach  Maximise storage  Public appeal STAGE 3  Firm load shedding in size order Stage 5 - Restoration STAGE 4  Isolation  NTS and LDZ stock  Emergency Spec Gas  Emergency Interruption  Public appeal

6 Uniform Network Code Obligations Section Q – Emergencies  Section defined as fulfilling two purposes Requirements to be complied with by Users Consequences of a Gas Supply Emergency in respect of application of the Code  Requirements for users. User contacts  Fax and Telephone Contact available 24hr / day as the primary user contact in a Gas Supply Emergency  Must have appropriate authority and responsibility Site Contacts  Large Firm Supply Points (AQ >25,000 therms)  Interruptible Supply Points  Power and Authority to comply with directions  Contact details to be provided to xoserve for onward cascade to the relevant Transporters. User Emergency procedures  User should ensure alignment with section Q and emergency procedures  Relevant personnel are familiar with the Emergency Procedures

7 Summary of Section Q Emergency Contact requirements. Large Firm Interruptible >25000 therms >50000 therms Site Manned 24 Hours 24 hour Emergency Contact and Job Title Emergency Contact Telephone Number Fax 11 Site Not Manned 24 Hours 24 hour Emergency Contact and Job Title Emergency Contact Telephone Number Fax 11 In addition to User contact details the User is responsible for providing the following site emergency contacts. (TPD Q 2.3 and 2.4)

8 Prelude reporting.  Whether the correct procedures were adhered to during the each stage.  Whether the notification method was correct according to the procedures.  Whether the information provided in any correspondence was legible and easy to understand.  Whether there was any confusion over what actions were required.  Whether or not there were enough people to implement the procedures required.  If the equipment was suitable for the job – was there enough equipment.  Ascertain the time taken to calculate the information required.  Ascertain whether the speed of response from the parties involved was reasonable.  If the Systems (including spreadsheets etc) were suitable for purpose.

9 Next Steps and Contacts Target of December to produce the report for the HSE All feedback is appreciated Reports, observations and comments to: Paul Youngman Claire Baldwin Lynn Crooks