| Description | Submitted to the Department of Energy in response to the request for UK Pipeline Operators to re-evaluate the operation and location of the Emergency Shutdown Valves and use of sub-sea isolation valves.The analysis was prompted by the Piper Alpha disaster. As well as MCP-01 pipeline, the report also covers isolation systems on TCP1 (Frigg), Alwyn and Ninian, and the subsea valves. For each there is an description of Existing Systems, the platforms, pipelines, risers and shutdown systems already in place; Hazard Identification to examine the potential causes of scenarios where an emergency shutdown would be necessary, the effectiveness of the safety systems in place and possible areas of improvements; Risk Assessment; and an Action Plan giving the scope and timing of improvements to be made. Includes process flow, cause and effect, and schematic structural diagrams. The study also contains a chapter on its limitations and methodology, and four appendices. With covering letter to the Department of Energy reiterating the main conclusions of the report. |