Pacific Gas and Electric Company Technical Specifications: Appendix N1



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Pacific Gas and Electric Company

Technical Specifications: Appendix N1

Purchase and sale Agreement

Simple Cycle (Combustion Turbine)










1. OVERALL FACILITY CONFIGURATION 11

1.1. Major Components 11

1.2. Balance of Plant Support Systems 11

2. SITE CONDITIONS 13

2.1. Site Elevation and Barometric Pressure 13

2.2. Temperatures 13

2.3. Precipitation, Wind, and Earthquake 13


3. CODES AND STANDARDS 13

3.1. State and Local Building Codes, Standards and Ordinances 14

3.2. U.S. Government Codes, Ordinances, and Standards 14

3.3. American Society of Mechanical Engineers 14

3.4. American National Standards Institute 15

3.5. Industry Standards 16

3.6. Electric Utility Requirements 17


4. TECHNICAL REQUIREMENTS 18

4.1. System Descriptions 19

4.2. Plant Identification System 19

4.3. Supplier Factory Tests 20

4.4. Testing 21

4.5. Welding 22

4.6. Lubrication 23

4.7. Consumables 23



5. OPERATIONAL REQUIREMENTS 23

6. MAJOR MECHANICAL EQUIPMENT AND SYSTEMS 25

6.1. Combustion Turbine 25

6.1.1. Turbine Supervisory Instrumentation (TSI) 25

6.1.2. Inlet Air Filter 26

6.1.3. Acoustic Enclosures 27

6.1.4. Water Wash System 27

6.1.5. Combustion Turbine Exhaust Duct 27

6.1.6. Exhaust Stack 27

6.2. Lube and Control Oil Systems 28

6.3. Closed Cooling Water System (if needed) 29

6.4. Turning Gear 29

6.5. Pumps 29

6.5.1. Pump Types 30

6.5.2. General Design and Construction 30

6.5.3. Pump Characteristics 31

6.5.4. Fittings 32

6.5.5. Bearings 32

6.6. Piping 33

6.6.1. Piping Materials 34

6.6.2. Pipe Velocities 36

6.6.3. Pipe Hangers and Supports 37

6.7. Valves 37

6.7.1. Drain and Vent Valves and Traps 38

6.7.2. Low-Pressure Water Valves 39

6.7.3. Instrument Air Valves 39

6.7.4. Non-Return Valves 39

6.7.5. Motor-Actuated Valves 39

6.7.6. Control Valves 40

6.7.7. Safety and Relief Valves 42

6.7.8. Instrument Root Valves 43

6.7.9. Float-Operated Valves 43

6.7.10. High-Pressure Valves 43

6.8. Insulation and Freeze Protection 44

6.9. Tanks 44

6.10. Heat Exchangers 45

6.11. Pressure Vessels 45

6.12. Fuel Gas Supply System 45

6.13. Water Source and Treatment System 47

6.14. Demineralized Water 48

6.15. Wastewater Treatment and Discharge 49

6.16. Sump Pumps 50

6.17. Potable Water 50

6.18. Fire Protection System 50

6.18.1. General 50

6.18.2. Seller’s Responsibility 51

6.18.3. Fire Protection Master Plan and Design Basis 51

g. Combustible and flammable gases and liquids process equipment and storage fire protection, quantity limitations, and storage requirements. 52

6.18.4. Codes, Standards and Recommendations 53

t. NFPA 92B, Standard for Smoke Management Systems in Malls, Atria, and Large Spaces 54

6.18.5. Other Codes and Standards 55

6.18.6. Materials, Equipment and System Components Listings and Approvals 55

6.18.7. Fire Protection Water Supply and Water Storage 56

6.18.8. Fire Pumps 57

6.18.9. Underground Fire Protection Water Main System and Hydrants 58

6.18.10. Fire Hydrants 59

6.18.11. Fire Protection and Detection System 59

6.19. Fire Detection System 64

6.20. Compressed Air System 66

6.21. Cranes, Hoists, and Trolleys 67

6.22. Heating Ventilating and Air Conditioning 68

6.22.1. System Function 68

6.22.2. Buildings and Enclosures 69

6.22.3. Air Conditioning System 69

6.22.4. Battery Room Exhaust System 70

6.22.5. Design Parameters 70

6.22.6. Standards 71



7. MAJOR ELECTRICAL EQUIPMENT AND SYSTEMS 72

7.1. Frequency and Voltage Limits 73

7.1.1. Frequency 73

7.1.2. Voltage 73

7.2. Auxiliary Equipment 73

7.3. Synchronous Generator 73

7.3.1. Construction of the Generator 74

7.3.2. Accessories 75

7.3.3. Generator Neutral Grounding 75

7.3.4. Excitation Systems 75

7.4. Isolated Phase Bus Ducts, Non-Segregated Phase Bus Ducts, and Generator Circuit Breakers 76

7.5. Plant Electrical Auxiliary Systems 77

7.6. Electrical System Design and Equipment Requirements 78

7.7. Automatic Generation Control Terminal 79

7.8. Generator Bus 81

7.9. Neutral Grounding Equipment 82

7.10. GSU Transformer Bank 82

7.10.1. GSU Cooling System 83

7.10.2. Generator Breakers 83

7.11. Unit Auxiliary Transformer 83

7.12. System Protection 84

7.12.1. Generator Protective Relaying 86

7.12.2. Generator Bus and Transformer Protective Relaying 87

7.12.3. Main Power Transformer Protective Relaying 87

7.12.4. Auxiliary System Relaying 87

7.12.5. Major Interlocks 88

7.12.6. Lockout Relay Actions 88

7.12.7. Protective Relays 88

7.13. Medium Voltage Bus Duct 88

7.13.1. Non-Segregated Phase Bus Duct/Cable Bus (as required) 88

7.13.2. Bus Ratings 89

7.13.3. Cable Bus Duct 89

7.13.4. Bus Ratings 89

7.13.5. Conductors 89

7.13.6. Medium Voltage System 89

7.14. Low-Voltage System 91

7.14.1. System Configuration 91

7.14.2. Transformers 91

7.15. Switchgear 91

7.16. Motor Control Centers 92

7.16.1. Operational Requirements 93

7.16.2. Protection 93

7.17. Alternate Power Source 93

7.18. Essential Service AC System 93

7.18.1. Uninterruptible Power Supply 94

7.18.2. Rectifier 94

7.18.3. Inverter 94

7.18.4. Static Transfer Switch 94

7.18.5. Essential Service 120V AC Distribution Panelboard 95

7.19. Essential Service DC System 95

7.19.1. Batteries 95

7.19.2. Battery Accessories 96

7.19.3. Battery Chargers 96

7.20. Motors 97

7.20.1. 4000V Motors 97

7.20.2. Low-Voltage Motors 99

7.21. Standby Power Generator 100

7.22. Miscellaneous 101

7.22.1. Communications Section 101

7.22.2. Security 101

7.22.3. Panelboards 102

7.22.4. Grounding and Lightning Protection System 102

7.22.5. Cathodic Protection System 103

7.22.6. Lighting Systems 103

7.22.7. Cable and Raceway Systems 104

7.23. General Wiring Requirements 108

7.24. Protective Relay Panel Functional Requirements 109

7.25. Workstations 109

7.26. Testing and Checking of Electrical Equipment 109

7.27. Embedded Work 109

7.28. Freeze Protection 109

7.29. Switchyard 110

7.29.1. System Description and Scope 110

7.29.2. Circuit Breakers 111

7.29.3. Disconnect Switches 111

7.29.4. System Protection 111

7.29.5. Control 112

7.29.6. Power Metering 112

7.29.7. Non-Revenue Metering 112

7.29.8. Steel Structures 114

7.29.9. Miscellaneous 114

7.29.10. Switchyard Grounding and Lightning Protection 114

7.29.11. Stability Study 115

8. INSTRUMENTATION AND CONTROL REQUIREMENTS 115

8.1. Distributed Control System 117

8.1.1. Performance Requirements 118

8.1.2. Functional Requirements 118

8.1.3. Console Design 118

8.1.4. Hardware Requirements 119

8.1.5. DCS Partitioning 119

8.1.6. Power 119

8.1.7. System Failure Protection 119

8.1.8. DCS Communication Network 119

8.1.9. Printers 120

8.1.10. Computing Hardware and System I/O 120

8.1.11. System Cabinets 120

8.1.12. Electrical Design Criteria 121

8.2. Software Requirements 121

8.2.1. Data Acquisition 121

8.2.2. DCS Interfaces 123

8.3. Testing 124

8.3.1. Tools 124

8.3.2. Installation and Operating Instructions 125

8.4. Continuous Emissions Monitoring System 125

8.4.1. Analyzer Subsystem 125

8.4.2. Sample Transport System 126

8.4.3. Stack Gas Monitoring Equipment 126

8.4.4. CEMS Data Logger 126

8.4.5. Documentation 127

8.4.6. Shipping 127

8.4.7. Factory Checkout 127

8.5. Data Acquisition System 127

8.5.1. Software 128

8.5.2. Data Communications System 129

8.5.3. Reporting and Recordkeeping Requirements 129

8.5.4. Quality Assurance and Quality Control Data 129

8.6. Balance Of Plant Instrumentation Installation Criteria And Installation Details 130

8.6.1. Scope of Specification 130

8.6.2. Instrumentation Electrical Requirements 133

8.6.3. Pressure Instruments 133

8.6.4. Temperature Instruments 135

8.6.5. Level Instruments 136

8.6.6. Level Gauges 138

8.6.7. Flow Elements – Flow Nozzles and Venturis 138

8.6.8. Flow Elements – Orifice Plates 139

8.6.9. Annunciators, Alarm Switches, and Electrical Devices 140

8.6.10. Process Analyzers and Analyzer Systems 141

8.6.11. Pressure and Temperature Switches 143

8.7. Instrument Air and Service Air Systems 143

8.8. Field-Mounted Instruments 143

8.8.1. Instrumentation - General Design 144

8.8.2. Instrument Cabinets and Local Control Panels 145

8.8.3. Instrument Tubing and Piping 146

8.8.4. Air Piping, Fittings, and Pneumatic Devices 148

8.9. Steam/Water Sampling and Analysis 149

8.10. Vibration Monitoring System 149

8.11. Plant Siren System 149

8.12. Instrument Calibration 149

8.13. I&C Maintenance Area Requirements 149



9. CIVIL AND STRUCTURAL WORKS 150

9.1. Design Criteria 150

9.1.1. Dead Loads 150

9.1.2. Live Loads 150

9.2. Site Preparation 153

9.3. Geotechnical Investigations 153

9.4. Surveying 154

9.5. Site Development and Earth work 154

9.6. Temporary Construction Facilities 154

9.7. Facility Grading 155

9.7.1. Earthwork 156

9.7.2. Clearing and Grubbing 157

9.7.3. Stripping 157

9.7.4. Disposal of Unusable Soils 157

9.7.5. Erosion Control 158

9.7.6. Existing Underground Facilities 158

9.8. Access 158

9.9. Water Discharge Systems 159

9.9.1 Clean Storm Water Discharge System 159

9.9.2 Oil-Contaminated Discharge Systems 160

9.9.3 Process Wastewater Discharge System 161

9.9.4 Sanitary Wastewater Discharge System 161

9.10. Roads, Parking Lots, and Walkways 162

9.10.1. Facility Roads 162

9.10.2. Road Width and Clearance Requirements 162

9.10.3. Road Pavement 163

9.10.4. Parking Lots 163

9.10.5. Chemical Unloading 163

9.10.6. Facility Area Surfacing 164

9.10.7. Surfacing Plan 165

9.11. Landscaping 165

9.12. Fencing and Signage 165

9.13. Buildings 166

9.13.1. Location and Footprint of Buildings 166

9.13.2. Building Requirements and Sizes 167

9.13.3. Architectural 170

9.13.4. Furnishings 172

9.13.5. Building Systems 173

9.14. Foundations for Equipment and Structures 173

9.15. Concrete Work 174

9.16. Masonry Work 175

9.17. Steel Work 175

9.17.1. Steel Grating and Steel Grating Stair Treads 175

9.17.2. Stairs and Ladders 176

9.18. Painting and Coatings 176

9.19. Design 178

9.20. Construction 179

9.21. Testing and Inspections 179


10. DOCUMENT SUBMITTALS 180

10.1. Documents To Be Submitted For Purchaser Review and Comment 181

10.2. Performance Curves 185

10.3. Purchaser's Right to Receive Additional Documents for Information 186

10.4. Documents To Be Submitted Before Turn over of Facility 187

10.5. Drawings and Lists 188

10.6. Instruction Books and Operating Manuals 188





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