Offshore Substation Design Development of Standards

1 Project: Offshore Substation Design Development of Standards Purpose: Final Report Date: July 20, 2015 BSEE Project Number: E14PC00006 Location: N/A M&N Project Number: 8535 Offshore Substation Design Development of Standards Presented to: Bureau of Safety and Environmental Enforcement (BSEE) & Bureau of Ocean Energy Management (BOEM) Issue: Issue Date: Prepared By: Reviewed By: Draft May 29, 2015 Sean Jessup, PE Dan Dolan, PE Final July 20, 2015 Sean Jessup, PE Dan Dolan, PE Prepared by: Offshore Substation Design Development of Standards BSEE / BOEM Table of Contents 1. Introduction .. 1 2. Current Laws Governing Design .. 3 29 CFR 1910 Occupational Safety and Health Standards .. 3 29 CFR 1926 Safety and Health Regulations for Construction .. 3 30 CFR 585 Renewable Energy and Alternate Uses of Existing Facilities on the Outer Continental Shelf.

2 3 Standards Incorporated by Reference .. 4 3. Gaps Identified in Design 4 Structural (Including Geotechnical) In-Service .. 5 Pre-Service .. 5 Safety .. 5 Environmental .. 5 Electrical .. 6 Mechanical .. 6 Fire Protection .. 6 Helideck .. 6 4. Commentary on Recommendations .. 7 Structural (Including Geotechnical) In-Service .. 7 Platform Loads Dead and Live Loads .. 7 Platform Loads Environmental Loads: Wind, Current, Waves .. 7 Platform Loads Environmental Loads: Snow and Ice .. 8 Platform Loads Environmental Loads: Earthquake .. 8 Platform Loads Accidental Loads: Fire Loads .. 9 Platform Loads Accidental Loads: Blast Loads .. 9 Platform Loads Accidental Loads: Vessel Collision .. 9 ii Offshore Substation Design Development of Standards BSEE / BOEM Platform Loads Accidental Loads: Dropped Objects.

3 10 Platform Loads - Load Combinations .. 10 Steel Design Materials .. 11 Steel Design - Superstructure Design .. 11 Foundation Design - Substructure, Steel Pile / Jacket .. 12 Structural Design - Substructure, Concrete Gravity Foundation .. 13 Structural Design - Substructure, Floating .. 13 Structural Design - Substructure, Tension Leg Platforms (TLP)s .. 13 Structural Design - Jack-Ups .. 14 Structural Design - Mobile Offshore Units .. 14 Steel Design Fatigue .. 14 Steel Design Appurtenances .. 15 Corrosion Protection .. 15 Coatings .. 15 Scour .. 15 Fabrication .. 16 Welding .. 16 Connections .. 17 Inspections and Assessment .. 17 Decommissioning .. 17 Pre-Service .. 18 Platform Loads Construction Loads, Load out and lifting .. 18 Platform Loads Construction Loads, Transportation and Installation.

4 18 On-bottom Stability .. 18 Impact Loads .. 19 iii Offshore Substation Design Development of Standards BSEE / BOEM Tolerances .. 19 Safety .. 19 Egress .. 20 Handrails, Ladders, & stairways .. 20 Noise .. 20 Storage of Flammable Materials .. 20 Manned vs Unmanned .. 20 Platform Access .. 20 Slips, Trips, & Falls .. 21 Maintenance and Rigging .. 21 Lifting .. 21 Emergency Shelter .. 21 Aids to Navigation .. 21 Aviation Aids .. 21 Safety Shower and Eye Wash .. 21 Environmental .. 22 Oil Spills .. 22 Environmental Management Program .. 22 Electrical .. 22 Arc Flash Analysis .. 23 Automatic Transfer Switches .. 23 Battery Systems .. 24 Cable Trays .. 24 CCTV .. 25 Communications .. 25 iv Offshore Substation Design Development of Standards BSEE / BOEM Conductors HV & MV .. 26 Low Voltage Conductors.

5 27 Electric Field Testing and Communications .. 28 Equipment Enclosures & Hardware .. 28 Diesel Generators .. 30 High Voltage & Medium Voltage Gas Insulated Switchgear (GIS) .. 31 Grounding .. 31 Interior Electrical .. 32 Lighting .. 32 Lightning Protection .. 34 Motor Control Centers Low Voltage (MCC-LV) .. 34 Metal Clad Switchgear (SG) .. 35 Metering .. 36 Metal Switchgear Low Voltage (MSG-LV) .. 36 PAGA .. 37 Panelboards .. 38 Protective Relaying .. 38 Raceways .. 39 Selective Coordination .. 39 Seismic .. 40 Surge Protection .. 40 Transformers HV MV .. 41 Transformer LV .. 42 Transformer Neutral Grounding Resistors .. 43 UPS Systems .. 43 v Offshore Substation Design Development of Standards BSEE / BOEM Mechanical .. 44 Drain System .. 44 Pipes .. 44 Pumps / Sump Pumps.

6 44 Deck Washing .. 45 HVAC .. 45 Pedestal Crane .. 45 Bridge Crane .. 45 Jib Crane .. 46 Dump Tanks .. 46 Life Rafts .. 46 Fire Protection .. 46 Fire detection system .. 46 Fire Suppression System .. 47 Life Safety Design .. 47 Passive Protection .. 47 Fire Extinguishers .. 47 Helideck .. 48 Structural .. 48 Electrical .. 48 Fire Protection .. 48 5. Summary .. 49 6. Next Steps .. 55 Appendix A List of Codes and Standards Considered .. 1 Appendix B Table of Design Elements with Gaps and Recommendations .. 1 Appendix C Industry Standards for Electrical Design Elements .. 1 vi Offshore Substation Design Development of Standards BSEE / BOEM List of Figures Figure 1: Project Plan .. 2 Figure 2: Laws and Standards Governing Offshore Substation Design .. 54 List of Tables Table 1: Clearly Applicable CFRs to Offshore Substations.

7 3 Table 2: Recommended Codes to be Required for Arc Flash Analysis .. 23 Table 3: Recommended Codes to be Required for Automatic Transfer Switches .. 23 Table 4: Recommended Standards Relating to Automatic Transfer Switches .. 24 Table 5: Recommended Codes to be Required for Design of Battery Systems .. 24 Table 6: Recommended Standards Relating to Battery Systems .. 24 Table 7: Recommended Code to be Required for Cable Tray Design .. 25 Table 8: Recommended Codes to be Required for CCTV 25 Table 9: Recommended Standards Related to CCTV .. 25 Table 10: Recommended Codes to by Required for Communications .. 25 Table 11: Recommended Standards Related to Communications .. 26 Table 12: Recommended Codes to be Required for Conductors HV & MV .. 26 Table 13: Recommended Standards Relating to HV & MV 27 Table 14: Recommended Codes to be Required for Low Voltage Conductors.

8 27 Table 15: Recommended Standards Relating to Low Voltage Conductors .. 27 Table 16: Recommended Codes to be Required for Electric Field Testing and Communications .. 28 Table 17: Recommended Standard Relating to Electric Field Testing and Communications .. 28 Table 18: Recommended Codes to be Required for Equipment Enclosures & 28 Table 19: Recommended Standards Relating to Enclosures & Hardware .. 29 Table 20: Recommended codes to be Required for Diesel Generators .. 30 Table 21: Recommended Standards Related to Diesel Generators .. 30 vii Offshore Substation Design Development of Standards BSEE / BOEM Table 22: Recommended Codes to be Required for HV & MV GIS .. 31 Table 23: Recommended Standards Relating to High Voltage & Medium Voltage Gas Insulated Switchgear (GIS) .. 31 Table 24: Recommended Codes to be Required for Grounding.

9 31 Table 25: Recommended Standards Related to Grounding .. 32 Table 26: Recommended Codes to be Required for Interior Electrical .. 32 Table 27: Recommended Standards Related to Interior Electrical .. 32 Table 28: Recommended Codes to be Required for Lighting .. 33 Table 29: Recommended Standards Related to Lighting .. 33 Table 30: Recommended Codes to be Required for Lightning Protection .. 34 Table 31: Recommended Standards Relating to Lightning Protection .. 34 Table 32: Recommended Codes to be Required for MCC-LV .. 35 Table 33: Recommended Standards Related to MCC-LV .. 35 Table 34: Recommended Codes to be Required for Metal Clad 35 Table 35: Recommended Standards Related to Metal Clad SG .. 35 Table 36: Recommended Codes to be Required for Metering .. 36 Table 37: Recommended Standards Related to Metering .. 36 Table 38: Recommended Codes to be Required for MSG-LV.

10 37 Table 39: Recommended Standards Related to MSG-LV .. 37 Table 40: Recommended Codes to be Required for PAGA .. 37 Table 41: Recommended Standards Related to PAGA .. 38 Table 42: Recommended Codes to be Required for Panelboards .. 38 Table 43: Recommended Standards Related to Panelboards .. 38 Table 44: Recommended Codes to be Required for Protective Relaying .. 39 Table 45: Recommended Standards Related to Protective Relaying .. 39 viii Offshore Substation Design Development of Standards BSEE / BOEM Table 46: Recommended Codes to be Required for Raceways .. 39 Table 47: Recommended Codes to be Required for Selective Coordination .. 40 Table 48: Recommended Standards Related to Selective Coordination .. 40 Table 49: Recommended Codes to be Required for Seismic 40 Table 50: Recommended Codes to be Required for Surge Protection .. 40 Table 51: Industry Standards Related to Surge Protection.