1. Mod 373 “Governance of NTS Connection Processes”
Review Group August 2010
WG0508: Feasibility Study Report – Contents

2. Background (1)
Feasibility Studies are invariably bespoke in nature in order to fulfil the customer’s requirements - dependent on the location and type of NTS connection required
Feasibility Studies may be requested by customers on an ‘optioneering’ basis; can therefore be speculative
The current Feasibility Study Agreement does not confer any obligations on either party to develop or modify an NTS connection
National Grid does not generally require a Feasibility Study to be undertaken where the customer requires a new NTS connection in a ‘greenfield’ site

3. Background (2)
National Grid is required to adhere to statutory legislation and has legal obligations in relation to the NTS connections process:
Health and Safety at Work Act 1974
Pipeline Safety Regulations (PSR) 1996
Reg 5 – design of a pipeline
Pressure Systems (Safety) Regulations (PSSR) 2000
Imposes a duty on designers, manufacturers etc to ensure systems are fit for purpose so as to prevent danger (Reg 4)
Responsibility on National Grid to ensure Safe Operating Limits (SOL) on our customers’ and our own equipment are not exceeded

4. Feasibility Study - Contents (1)
Contents of a feasibility study report depend on the nature of the study being undertaken
Example content headings for a power station ramp rate study:
Introduction
The Model
Scenarios Modelled
Conclusions

5. Feasibility Study - Contents (2)
Example content headings for increase in offtake pressure where NGG owns the metering installation:
Introduction
Background
Filters
Metering
Gas Pre Heat System
Fuel Gas Skid Unit
Regulator Arrangement
Transient Study
Conclusions and Recommendations

6. Feasibility Study - Contents (3)
Example content headings for new connection at large, complex existing site:
Executive Summary & Introduction
Codes of Practice & Legislation
National Grid Site Facilities
Design Parameters
New Connection
Mechanical Design
Gas Flow and Isolation Valves Configuration
Corrosion Protection
Electrical and Instrumentation
Description of Equipment and Devices
Crossing and Installation Techniques

7. Feasibility Study - options
Standalone – as is
Combined with Conceptual Design Study (CDS) – does not include final detailed design and construction
review the use and purpose of the CDS in order to achieve this
Others?