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BS IEC 63046:2020 Nuclear power plants. Electrical power system. General requirements, 2020
- undefined
- English [Go to Page]
- CONTENTS
- FOREWORD
- INTRODUCTION
- 1 Scope [Go to Page]
- 1.1 General
- Figures [Go to Page]
- Figure 1 – Scope of work of this document
- 1.2 Application: new and pre-existing plants
- 1.3 Framework
- 1.4 Interaction with level 2 standards
- Figure 2 – Architecture of Electrical Power System
- 2 Normative references
- 3 Terms and definitions
- 4 Abbreviated terms
- 5 Overall Electrical Power System life cycle
- 6 Architecture of Electrical Power System: identification of requirements [Go to Page]
- 6.1 Objectives
- Figure 3 – Connections between the overall Electrical Power System life cycleand the life cycles of the electrical power sub- systems
- 6.2 Safety requirements applicable to the electrical architecture design [Go to Page]
- 6.2.1 Defence in Depth
- 6.2.2 Application of Single Failure Criterion
- 6.2.3 Management of the Common Cause Failure
- 6.2.4 Loss Of Off-site Power conditions
- 6.2.5 Station Black Out conditions
- 6.2.6 Loss of Electrical Power conditions
- 6.2.7 Application of internal and external Hazards
- 6.2.8 Nuclear security requirements
- 6.2.9 Classification requirements
- 6.2.10 Probabilistic requirements
- 6.3 Electrical requirements [Go to Page]
- 6.3.1 Requirements coordinated with the electric grid operator
- 6.3.2 Electrical disturbances
- 6.4 Functional performance requirements
- 6.5 Maintenance requirements
- 7 Design of the electrical architecture [Go to Page]
- 7.1 Objectives
- 7.2 Safety design provision [Go to Page]
- 7.2.1 Defence in Depth in the Electrical Power System
- 7.2.2 Single Failure in the Electrical Power System
- 7.2.3 Common Cause Failure in the Electrical Power System
- 7.2.4 Provisions for coping with Loss Of Off-site Power
- 7.2.5 Provisions for coping with Station Black Out
- 7.2.6 Provisions to avoid or reduce Loss of Electrical Power
- 7.2.7 Classification consideration
- 7.2.8 Provisions to achieve the reliability target for the Electrical Power System
- 7.3 Electrical design provision [Go to Page]
- 7.3.1 General
- 7.3.2 Coordination with the grid
- 7.3.3 Design to achieve electrical requirements
- Figure 4 – Typical voltage design bases (IEC 62855)
- 7.4 Functional and performance design provisions [Go to Page]
- 7.4.1 General
- 7.4.2 Electrical Power System studies
- 7.4.3 Design of the Interruptible Power Supply System
- 7.4.4 Design of the Uninterruptible Power Supply System
- 7.5 Maintenance [Go to Page]
- 7.5.1 Consideration of the maintenance in the electrical design
- 7.6 Multi-unit shared electrical power systems
- 7.7 Electrical system layout
- 7.8 Supporting and associated systems for the Electrical Power System
- 7.9 Overall quality assurance programs
- 7.10 Requirements for output documentation [Go to Page]
- 7.10.1 General
- 7.10.2 Architecture principles
- 7.10.3 Single line diagrams
- 8 Sub-system requirements [Go to Page]
- 8.1 Electrical Power System basis requirements [Go to Page]
- 8.1.1 General
- 8.1.2 System Design
- 8.1.3 Single line diagram
- 8.2 Equipment design specification
- 8.3 Equipment requirements
- 8.4 AC Interruptible Electrical Power Supply System
- 8.5 AC/DC Uninterruptible Power Supply System
- 8.6 Coordination and interaction with power grid
- 8.7 Earthing
- 9 Verification of the architecture of the Electrical Power System [Go to Page]
- 9.1 General
- 9.2 Computerised tools and models verification [Go to Page]
- 9.2.1 Electrical Power System verification
- 9.2.2 Layout of electrical power systems and equipment verification
- 9.3 Test requirements
- 10 Overall integration and commissioning [Go to Page]
- 10.1 General
- 10.2 Requirements
- 10.3 Output documentation
- 11 Overall operation and maintenance [Go to Page]
- 11.1 General
- 11.2 Requirements
- 11.3 Output documentation
- 12 System quality assurance plan [Go to Page]
- 12.1 General
- 12.2 System verification plan
- 12.3 System configuration management plan
- 12.4 Fault resolution procedures
- Annex A (informative)Basic safety issues in NPPs [Go to Page]
- A.1 General
- A.2 Plant safety objectives
- A.3 Plant safety analysis [Go to Page]
- A.3.1 General
- A.3.2 Analysis of event sequences
- A.3.3 Assessment of design basis: deterministic/probabilistic methods
- A.4 Defence in Depth
- Table A.1 – Support of the electrical power supply for the defence in depth of the plant
- Annex B (informative)AC Interruptible Electrical Power System [Go to Page]
- B.1 General
- B.2 Electrical design provisions [Go to Page]
- B.2.1 Steady state conditions for Electrical Power System
- B.2.2 Electrical disturbances
- B.3 Design of the Interruptible power system [Go to Page]
- B.3.1 Design of the preferred power supply
- B.3.2 Design of the off-site power supply
- B.3.3 Design of on-site preferred power supply
- B.3.4 Design of the AC interruptible power systems important to safety
- B.3.5 Design of internal standby sources
- B.4 Preferred power supply system (from IAEA SSG 34:2016, chapter 6, clauses 6.1 to 6.44) [Go to Page]
- B.4.1 General
- B.4.2 Operation
- B.4.3 Grid interface and agreement with grid operator
- B.4.4 Reliability of the preferred power supply
- B.4.5 Off-site power supplies
- B.4.6 Availability
- B.4.7 Independence of off-site circuits
- B.4.8 Switchyard
- B.5 Safety power supply system supporting DBC (from IAEA SSG 34:2016, chapter 7) [Go to Page]
- B.5.1 General
- B.5.2 Design (from IAEA SSG 34:2016, chapter 7, clauses 7.36 to 7.63)
- B.5.3 Testing (from IAEA SSG 34:2016, chapter 7, clauses 7.64 to 7.67)
- B.5.4 Performance criteria (transient and dynamic) (from IAEA SSG 34:2016, chapter 7, clauses 7.68 to 7.70)
- B.5.5 Relay protection of standby power sources (from IAEA SSG 34:2016, chapter 7, clauses 7.71 to 7.75)
- B.5.6 Support systems for standby AC power sources
- B.5.7 Fuel for standby AC power sources
- B.6 Power supply system important to safety supporting DEC [Go to Page]
- B.6.1 General
- B.6.2 Design (from IAEA SSG 34:2016, chapter 8, clauses 8.1 to 8.18)
- B.7 Mobile sources connections network
- B.8 Monitoring and switching of buses
- Annex C (informative)Earthing
- Annex D (informative)Logic diagram followed for the design of the EPS
- Bibliography [Go to Page]
