NEC Network Emergency Exercise Exercise Prelude
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
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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 Safety (Management Regulations 1996
NEC Safety Case
Transporters Safety Case
E/1 Network Gas Supply
Emergency procedure
E/2 Local Gas Supply
Emergency procedure
E/3 for detailed incident management
3
Gas Act 1995
Network Code
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
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NGSE Stages
Normal
Operations
STAGE 1
 Markets
NTS and LDZ
in normal
operation
residual
balancer
 Normal
level of
reporting
 Gas Balance
Alert
5
Emergency Arrangements
 NG role of
stock
Emergency Spec
Gas
STAGE 2
 Suspend
National Grids
residual
balancing role
 Maximise
Emergency
beach
Interruption
Public appeal
 Maximise
storage
 Public appeal
Stage 5 - Restoration
STAGE 3
 Firm load
shedding in
size order
STAGE 4
 Isolation
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
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Summary of Section Q Emergency Contact
requirements.
In addition to User contact details the
User is responsible for providing the
following site emergency contacts.
(TPD Q 2.3 and 2.4)
Site Manned 24
Hours
Large Firm
>25000
therms
>50000
therms
Interruptible
24 hour Emergency
Contact and Job Title
1-5
1-5
1-4
Emergency Contact
Telephone Number
1-5
1-5
1-4
1
1
Fax
Site Not Manned 24
Hours
24 hour Emergency
Contact and Job Title
3-5
3-5
3-4
Emergency Contact
Telephone Number
3-5
3-5
3-4
1
1
Fax
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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.
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Next Steps and Contacts
Target of December to produce the report for the HSE
All feedback is appreciated
Reports, observations and comments to:
[email protected]
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Paul Youngman
01926 654151
Claire Baldwin
01926 653232
Lynn Crooks
01926 653223