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Gas GAP Analysis Process - A starting point for DIMP

Gas GAP Analysis Process - A starting point for DIMP. Adam Marxen Manager Gas Engineering and Operations Support. Alliant-Energy Utilities. Over 1,000 Community’s in Iowa, Wisconsin, and Minnesota. Customers : Gas - 410,000 Electric - 980,000 Facilities Gas

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Gas GAP Analysis Process - A starting point for DIMP

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  1. Gas GAP Analysis Process - A starting point for DIMP Adam Marxen Manager Gas Engineering and Operations Support

  2. Alliant-Energy Utilities • Over 1,000 Community’s in Iowa, Wisconsin, and Minnesota. • Customers: • Gas - 410,000 • Electric - 980,000 • Facilities • Gas • 8,300 miles distribution (4,500 in IPL) • 850 miles transmission (800 in IPL) • Electric • 43,000 miles of distribution • 10,000 miles of transmission

  3. Outline • Introduction to the Alliant Planning and GAP Process • GAP Data Collection/Interpretation • Migration to DIMP • Questions

  4. Alliant Energy Business Systems“Know your systems” “Know your threats” • GIS • Established 1998 • ESRI’s ArcGIS with Telvent’s ArcFM • Integrated all gas facility records in GIS/facilities database • Linked facility records with inspection, leaks, and maintenance records • GIMMS – Gas Inspection & Maintenance Management System • Services, Valves, CP, Reg Stations, Steel Pipe Inspections, Odorization use and sniff tests, and maintenance tracking. • All inspections, leaks, and maintenance linked to GIS records • Initiated in 1988 & tied to GIS in 1998

  5. Alliant Planning and GAP Process“Risk Evaluation and Ranking” • GAP Planning Process • Identify and set priorities for gas projects that create the most value and minimize risk for the company. • Uses system performance metrics based on service reliability and safety • What is a GAP? • A GAP exists when the measured performance indicates a higher risk related to reliability or safety.

  6. What is the GAP Calculation based on? • Ranking criteria: • Peak Low Pressure • Leaks • Corrosion • Reliability • Visual Inspection • Age

  7. Regulation Station GAP Process • Assess each station to identify and score risks in: • Safety – location, traffic, barriers, leaks, corrosion • Operations – valves, preheaters, odorizers, station capacity, obsolete equipment, others • Code violations

  8. GAP Scoring Summary • Score each Gas System Element on each criteria based on weakest area. • System Elements typically based on unique pressure zone or regulation station. • Sort elements based on GAP score. • Analyze root cause for GAP and propose measures to eliminate or reduce GAP • Proposed solutions drive budgets and project lists

  9. GAP Spreadsheet Example

  10. GAP Spreadsheet Example (cont.)

  11. GAP Spreadsheet Example (cont.)

  12. GAP Data Collection • Gas Pressure (Charts, SCADA, and SynerGEE) • Reliability (GIS) • Gas Leaks (GIMMS) • Visual Inspection Data (GIMMS) • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS) • Age (GIS) • Meetings with each Op Zone • Manager • Lead Engineering Tech • Chief Gas Tech

  13. GAP Data Collection • Gas Pressure (Charts, SCADA, and SynerGEE) • Reliability (GIS) • Growth Capacity (SynerGEE) • Gas Leaks (GIMMS) • Visual Inspection Data (GIMMS) • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS) • Age (GIS) • Meetings with each Op Zone • Manager • Lead Engineering Tech • Chief Gas Tech

  14. GAP Data Collection • Gas Pressure (Charts, SCADA, and SynerGEE) • Reliability (GIS) • Growth Capacity (SynerGEE) • Gas Leaks (GIMMS) • Visual Inspection Data (GIMMS) • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS) • Age (GIS) • Meetings with each Op Zone • Manager • Lead Engineering Tech • Chief Gas Tech

  15. GAP Data Collection • Gas Pressure (Charts, SCADA, and SynerGEE) • Reliability (GIS) • Growth Capacity (SynerGEE) • Gas Leaks (GIMMS) • Visual Inspection Data (GIMMS) • Pipe-to-Soil Cathodic Protection Readings (GIMMS, GIS) • Age (GIS) • Meetings with each Op Zone • Manager • Lead Engineering Tech • Chief Gas Tech

  16. GAP Data Collection • Gas Pressure (Charts, SCADA, and SynerGEE) • Reliability (GIS) • Growth Capacity (SynerGEE) • Gas Leaks (GIMMS) • Visual Inspection Data (GIMMS) • Pipe to Soil Cathodic Protection Readings (GIMMS, GIS) • Age (GIS) • Meetings with each Op Zone • Manager • Lead Engineering Tech • Chief Gas Tech

  17. Transition to DIMP - Goals For Improvement • Develop written plan. • Update to meet additional DIMP risk assessment categories • Excavation activity • Impact assessment • Others • Refine model to appropriate “block” level. Gas system too big at times and individual pipe segment too small. • Develop scoring system on the “block” level that summarizes all criteria. • Develop standard reports • Include positive inspections in addition to the negative. The good observations are also informative. • Address compression coupling failure reporting.

  18. Questions

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