ML19150A473
Text
GINNA/UFSAR 8 ELECTRIC POWER 1
8.1 INTRODUCTION
2 8.1.1 GENERAL 2 8.1.2 OFFSITE POWER DESCRIPTION 2 8.1.3 ONSITE POWER DESCRIPTION 3 8.1.4 PRINCIPAL DESIGN CRITERIA 3 8.1.4.1 Performance Standards 3 8.1.4.2 Emergency Power 4 8.1.4.3 Adequacy of Electrical Design Relative to 1972 Criteria 5 8.1.4.4 Potential Risk of Station Blackout 6 8.1.4.5 Station Blackout Program 7 8.1.4.5.1 Assumptions 7 8.1.4.5.2 Ventilation 8 8.1.4.5.3 Plant Classification 8 8.1.4.5.4 Diesel Generator Reliability 8 8.1.4.5.5 Diesel Generator Cold Starts 9 8.1.4.6 Fukushima - Diverse and Flexible Coping Strategies (FLEX) 9 8.1.4.6.1 Regulatory Requirements 9 8.1.4.6.2 Site Response to NRC Orders 9 8.1.4.6.3 Summary of FLEX Strategies 10 8.1.4.6.3.1 Reactor Core Cooling and Heat Removal 10 8.1.4.6.3.2 RCS Inventory and Reactivity Control 10 8.1.4.6.3.3 Containment Integrity 11 8.1.4.6.3.4 Spent Fuel Pool Cooling 11 8.1.4.6.3.5 Electric Power 12 8.2 OFFSITE POWER SYSTEM 14 8.
2.1 DESCRIPTION
14 8.2.1.1 Transmission System 14 8.2.1.1.1 Step-up Transformers 14 8.2.1.1.2 Transmission Lines 14 8.2.1.1.3 Circuit Breakers 15 Page 1 of 4 Revision 28 5/2019
GINNA/UFSAR 8.2.1.1.4 Protective Relay Circuits 15 8.2.1.2 Station Auxiliary (Startup) Transformers 12A and 12B 16 8.2.2 ANALYSIS 18 8.2.2.1 Transmission System 18 8.2.2.1.1 Loss of Ginna Station Output 18 8.2.2.1.2 Switchyard Direct Current Power System 18 8.2.2.1.3 Transmission Network Protective Features 18 8.2.2.1.4 Northeast Power Coordinating Council Load-Shedding Practice 19 8.2.2.2 Station Auxiliary (Startup) Transformers 12A and 12B 20 8.2.2.2.1 Original Ginna Station Design 20 8.2.2.2.2 Transformer Failure Rates 20 8.2.2.2.3 Backup Auxiliary Transformers 21 8.2.2.3 Radiation Exposure During Restoration of Power 22 Table 8.2-1 DIRECT RADIATION DOSE RATES1 (REM/HR) 24 Table 8.2-2 INHALATION DOSE RATES2 (REM/SEC) 25 8.3 ONSITE POWER SYSTEM 26 8.3.1 ALTERNATING CURRENT POWER SYSTEM 26 8.3.1.1 Description 26 8.3.1.1.1 Single-Line Diagrams 26 8.3.1.1.2 Station Unit Transformer 26 8.3.1.1.3 The 4160-Volt System 27 8.3.1.1.4 The 480-Volt System 27 8.3.1.1.4.1 480-Volt Buses 27 8.3.1.1.4.2 Class 1E Trains 28 8.3.1.1.5 The 120-Volt Alternating Current System 29 8.3.1.1.5.1 Instrument Bus 1A 29 8.3.1.1.5.2 Instrument Bus 1B 30 8.3.1.1.5.3 Instrument Bus 1C 30 8.3.1.1.5.4 Instrument Bus 1D 30 8.3.1.1.6 Emergency Power 31 8.3.1.1.6.1 Emergency Power Sources 31 Page 2 of 4 Revision 28 5/2019
GINNA/UFSAR 8.3.1.1.6.2 Diesel-Generator Rapid Startup and Loading 31 8.3.1.1.6.3 Diesel-Generator Protective Trips 32 8.3.1.1.6.4 Fuel Oil Supply 32 8.3.1.1.6.5 Diesel-Generator Startup Logic 33 8.3.1.1.6.6 Emergency Power Supply 33 8.3.1.1.6.7 Emergency Diesel Generator Area (Support Station) EDG 1A 35 Emergency Local Control Panel 8.3.1.1.6.8 Regulatory Review of Diesel-Generator Capability 35 8.3.1.2 Analysis 35 8.3.1.2.1 Evaluation of Layout and Load Distribution 35 8.3.1.2.2 Diesel Generators 36 8.3.1.2.3 Normal Power Sources 36 8.3.1.2.4 Reliability Assurance 36 8.3.1.2.4.1 Redundancy 36 8.3.1.2.4.2 Sequencing Circuits 36 8.3.1.2.4.3 Sequencing Relays 37 8.3.1.2.4.4 Engineered Safety Features Actuation 38 8.3.1.2.4.5 Separation 38 8.3.1.2.4.6 Fuse Coordination 39 8.3.1.2.4.7 Overload and Short Circuit Protection 39 8.3.1.2.5 Instrument Bus Evaluation 39 8.3.1.2.6 Loss of Offsite Power Under Accident Conditions 40 8.3.1.2.6.1 Operator Actions 40 8.3.1.2.6.2 Reliability Assurance 41 8.3.1.2.7 Degraded Grid Voltage 42 8.3.1.2.7.1 Susceptibility to Degraded Grid Voltage Conditions 42 8.3.1.2.7.2 Adequacy of Onsite Power System Voltages 43 8.3.1.3 Containment Electrical Penetrations 43 8.3.1.4 Independence of Redundant Systems 44 8.3.1.4.1 Criteria Relating to Cable-Tray Loading and Separation 44 8.3.1.4.2 Separation of Redundant Circuits 45 8.3.1.4.3 Quality Assurance 46 Page 3 of 4 Revision 28 5/2019
GINNA/UFSAR 8.3.2 DIRECT CURRENT POWER SYSTEMS 46 8.3.2.1 Description 46 8.3.2.1.1 Direct Current System 46 8.3.2.1.2 Battery Room 47 8.3.2.1.3 Battery Chargers 47 8.3.2.1.4 Technical Support Center Battery 48 8.3.2.2 Analysis 48 8.3.2.3 Direct Current Fuse Coordination 49 8.3.3 FIRE PROTECTION FOR CABLE SYSTEMS 51 Table 8.3-1a ENGINEERED SAFETY FEATURES ACTUATION (ESFAS) 55 SEQUENCE ACTION (TRAIN A)
Table 8.3-1b ENGINEERED SAFETY FEATURES ACTUATION (ESFAS) 56 SEQUENCE ACTION - DIESEL GENERATOR LOADING Table 8.3-2a DIESEL GENERATOR LOADING (TRAIN A) 57 Table 8.3-2b DIESEL GENERATOR LOADING (TRAIN B) 58 Table 8.3-3 CONTAINMENT ELECTRICAL PENETRATIONS 59 Table 8.3-4 MAJOR BATTERY LOADS 61 FIGURES Figure 8.1-1 Electrical Distribution System Figure 8.2-1 Transmission Connections Page 4 of 4 Revision 28 5/2019