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Name	Category	Date	Size
Sub-Chapter 10.3 - Main Steam System (safety classified part).pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	756.11 KB
Sub-chapter 10.3 describes the safety, functional and design requirements, the design criteria, system design description, system parameters and operating conditions, instrumentation and control details, safety assessment, details of testing, and maintenance requirements for the main steam system. The main steam supply system is designed to ensure, a supply of steam to the turbine during normal power operation, and, in certain conditions, to protect the steam generators against overpressure. The main steam lines from the steam generators up to the first terminal fixed points downstream of the Main Steam Isolation Valves (MSIV) and including the MSIV are High Integrity Components (HIC) and details of the fast fracture analysis, manufacturing inspections and fracture toughness requirements are described. Download
Sub-Chapter 10.2 - Turbo-generator Set.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	82.77 KB
Information relating to the turbo-generator is both site and operator specific, and is therefore not included in the PCSR for generic design assessment. Download
Sub-Chapter 10.1 - General Description.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	206.84 KB
Sub-chapter 10.1 provides a general design description of the secondary cooling system, which converts thermal energy produced by the nuclear steam supply system into electrical power. Download
Sub-Chapter 9.5 - Other Supporting Systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	976.38 KB
Sub-chapter 9.5 describes the following systems: the fire protection systems and equipment, including the active methods of fire control, detection and extinguishing, and the design principles for the door monitoring system; the main and ultimate back-up/emergency diesel generators; the compressed air systems, including the compressed air production system and the instrument and service air distribution systems; the plant communication systems, including the alarm systems, paging and internal and external telephone communication systems; lighting systems including both normal and emergency lighting arrangements; gas distribution and storage systems, for distribution of nitrogen, oxygen, hydrogen and carbon dioxide. For each system, the safety and functional requirements, design criteria, system design description, system parameters and operating conditions, preliminary safety analysis, and testing, inspection and maintenance details, are provided. Download
Sub-Chapter 9.4 - Heating, Ventilation and Air-Conditioning Systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	3.31 MB
Sub-chapter 9.4 describes the main ventilation and cooling systems. Those systems which contribute to reducing radioactive discharges comprise: ventilation of the nuclear auxiliary building, the fuel building, and the waste treatment building; purging of the reactor building; and ventilation of the controlled areas of the safeguard buildings, the operational service centre and the access building. The systems that maintain the conditions required for the safety and habitability of the main control room include: air-conditioning of the main control room; ventilation of the containment, diesel buildings and the pumping station; and ventilation of the non-controlled area in the safeguard buildings. Also described here are the chilled water systems which produce and distribute chilled water to the ventilation systems. For each system, the safety and functional requirements, design criteria, system design description, system parameters and operating conditions, preliminary safety analysis, and testing, inspection and maintenance details, are provided. Download
Sub-Chapter 9.3 - Primary System Auxiliaries.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	1.2 MB
Sub-chapter 9.3 describes the following systems: the nuclear island physical and chemical sampling system, which comprises three separate sampling systems, one for the primary system, a second for the secondary side of the steam generators and a third system for the treatment systems located in the effluent treatment building; the chemical and volume control system and the reactor boron and water makeup system, both of which regulate the boron concentration in the reactor coolant; and the coolant storage and treatment system, which includes the coolant storage and supply, treatment, purification and degasification systems. For each system, the safety and functional requirements, design criteria, system design description, system parameters and operating conditions, preliminary safety analysis, and testing, inspection and maintenance details, are provided. Download
Sub-Chapter 9.2 - Water Systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	1022.68 KB
Sub-chapter 9.2 describes the water systems: the essential service water system, the component cooling water system, the demineralised water systems (for production, storage and distribution of demineralised water), the service water filtering system, the potable water system, and the ultimate cooling water system. For each system, the safety and functional requirements, design criteria, system description, system parameters and operating conditions, preliminary safety analysis, and testing, inspection and maintenance details, are provided. Download
Sub-Chapter 9.1 - Fuel Handling and Storage.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	2.14 MB
Sub-chapter 9.1 describes the fuel handling and storage systems: the new fuel dry storage rack, the underwater fuel storage rack, the spent fuel cooling and purification system, fuel and other handling systems, and the liners for the fuel handling and storage pools. For each system, the safety and functional requirements, design criteria, system design description, system parameters and operating conditions, preliminary safety analysis, and testing, inspection and maintenance details, are provided. Download
Sub-Chapter 8.6 - Prevention and protection against common cause failure.pdf		20-06-2023	199.04 KB
Sub-chapter 8.6 summarises the main features of the prevention and protection against Common Cause Failure (CCF). CCFs are failures on demand or during a system mission period that could affect and make several pieces of equipment or components within the same system or with the same function simultaneously unavailable, where the failures are due to the same cause. The sub-chapter sets out the arguments and evidence for the safety requirements which have been specified for CCF, including component failure, both external and internal hazards, and human error within the design of the electrical systems. The availability of an internal network and associated equipment is considered, including protection against over-voltage and high frequency range phenomena. Download
Sub-Chapter 8.5 – Installation.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	72.05 KB
Sub-chapter 8.5 summarises the main features of the civil installations in the nuclear island, conventional island and the balance of plant where the electrical distribution and instrumentation and control systems are installed, which contribute to the safety functionality and availability of the systems. Download
Sub-Chapter 8.4 - Specific Design Principles.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	146.95 KB
Sub-chapter 8.4 provides a general description of cabling design principles, including the requirements for separation between cableways and the various cable categories, and a description of the design principles applied to cable routing. The earthing and lightning protection systems, whose main function is to limit the risks of overvoltage on the electrical systems, and other electrical protection measures, are also described here. Download
Sub-Chapter 8.3 - Nuclear Island Power Supply.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	606.68 KB
Sub-chapter 8.3 describes power distribution systems and the emergency power supplies for the nuclear island. In the event of loss of off-site power, 10 kV main diesel generators restore the power supply or, in the event of loss of both off-site supplies and on-site normal emergency supplies, the 690 V ultimate emergency diesel generators restore power to two of the four divisions. The overall safety, functional and design requirements, and system architecture, are described. For each of the systems, the operating role, design criteria, system parameters and operating requirements are given. Details are also given of the safety requirements specified for equipment qualification. Download
Sub-Chapter 8.2 - Power Supply to the Conventional Island and Balance of Plant.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	99.98 KB
Sub-chapter 8.2 describes the role and main elements of the power supply to the conventional island and balance of plant, both the emergency and non-emergency power supplies. Download
Sub-Chapter 8.1 - External Power Supply.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	99.72 KB
Sub-chapter 8.1 describes the role and main elements of the external power supply for the nuclear island: the main and auxiliary connections, and transformers, including their operating role and design criteria, and system description. Download
Sub-Chapter 7.7 - IandC Tools Development Process and Substantiation.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	384.68 KB
Sub-chapter 7.7 provides information on the I&C procedures and tools used for the design of the three I&C platforms: the Teleperm XS platform for the protection system, the reactor control surveillance and limitation system, and the severe accident I&C; the SPPA-T2000 platform for the process information and control system, process automation system safety automation system; and the RRC-B safety automation system and the UNICORN platform for the non computerised safety system. For each platform, details are provided of: the reliability, availability and functional requirements; the software and hardware programming design and configuration; system integration, installation, and commissioning; verification and validation; and an overview of arrangements for operation, maintenance and modifications. Details are also given of the substantiation approach for software based systems using the Teleperm XS, SPPA-T2000 and UNICORN platforms and for the SMART devices and programmable complex electronic component, including production excellence activities and confidence building. Download
Sub-Chapter 7.6 – Instrumentation.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	459.52 KB
Sub-chapter 7.6 describes the instrumentation used in the UK EPR™. It covers: conventional process instrumentation; accident and severe accident instrumentation; the process instrumentation pre-processing system; in core and ex core instrumentation; rod position measurement; reactor pressure vessel water level measurement; loose parts monitoring and vibration monitoring; radiation monitoring; and boron instrumentation. The overall safety, functional and design requirements are given, and the description of each system includes where appropriate: measurement principles; system interfaces: design rules and structure; and installation, calibration, maintenance and testing details. Download
Sub-Chapter 7.5 - Class 3 Instrumentation and Control systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	385.52 KB
Sub-chapter 7.5 describes the RRC-B safety automation system, the process information and control system, the process automation system, and the severe accident I&C system. For each system, the safety and functional requirements; system description; design criteria; architecture, technology, and power supply, and testing, and maintenance details are provided. Download
Sub-Chapter 7.4 - Class 2 Instrumentation and Control systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	487.27 KB
Sub-chapter 7.4 describes the safety automation system, the reactor control surveillance and limitation system, and the non-computerised safety system. For each system, the safety and functional requirements; system description; design criteria; architecture, technology, and power supply, and testing, and maintenance details are provided. Download
Sub-Chapter 7.3 - Class 1 Instrumentation and Control systems.pdf	Pre-Construction Safety Report (PCSR)	20-06-2023	999.33 KB
Sub-chapter 7.3 describes the protection system and the safety information and control system. For each system, the safety and functional requirements; system description; design criteria; architecture, technology, and power supply, and testing, and maintenance details are provided. These class 1 systems manage category A I&C functions and are required to attain a controlled state after a fault, or failure during normal power plant operation that would lead to a fault. Download
Sub-Chapter 7.2 - General architecture of the Instrumentation and Control systems.pdf		20-06-2023	643.26 KB
Sub-chapter 7.2 describes the general architecture of the overall I&C system, including the interfaces between the various system levels and operating conditions and explains how the I&C architecture fulfils the design requirements such as reliability, independence and diversity. The layout of the I&C equipment in different rooms (mainly in the safeguard and electrical buildings) is discussed. The qualification process and principles are defined, in order to demonstrate that the various instrumentation & control components and systems are capable of responding to design requirements for safety performance. Download