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Enhanced CANDU 6 Technical Summary Company Proÿle ♦)) SNC • LAVALIN Building what matters Enhanced CANDU 6 Technical Summary Company Proÿle SNC-Lavalin’s Nuclear team provides leading nuclear on four continents. CANDU technology provides safe, technology products and full-service solutions to reliable, affordable and CO2-free energy to support nuclear utilities around the globe. Our team of 1,200 the economic viability of businesses and quality of engineering, procurement, construction and project life for consumers in Canada, Romania, Korea, China management experts offer customized operations, and Argentina. CANDU reactors have an outstanding maintenance and plant life management services, performance record, taking four of the top ÿve places including waste management and decommissioning. on Nuclear Engineering International’s 2013 Top Our experts in nuclear steam plant and balance of Lifetime Performers List. plant engineering carry out life extension projects, and Continuing a tradition of building nuclear reactors design and deliver state-of-the-art CANDU® reactors, for over 50 years, we make signiÿcant contributions which are capable of operating on many types of fuel to the nuclear energy ÿeld. CANDU technology is the including natural uranium, mixed oxide (MOX) fuel, basis for Canada’s nuclear power program and has recycled uranium (RU) and thorium. been adopted in the nuclear power programs of many We are the stewards of CANDU technology. The countries. The 11 CANDU 6 units, in ÿve countries, 47 heavy water reactors in operation or under life have consistently delivered an average lifetime extension are based on our CANDU design and are an capacity factor of over 87%. important component of clean air energy programs Noteworthy facts about the CANDU reactor łeet CANDU REACTORS CANDU BRAND CONSISTENTLY RANK IS RECOGNIZED AS ONE OF AS TOP PERFORMERS THE TOP 10 MAJOR AND HOLD THE WORLD RECORD FOR ENGINEERING ACHIEVEMENTS LONGEST CONTINUOUS OPERATION OF THE PAST CENTURY IN CANADA CANDU REACTORS CAN EXCELLENT BE EASILY ADAPTED FOR PERFORMANCE FLEXIBLE FUEL OF THE CANDU 6 FLEET WITH AN AVERAGE LIFETIME % CYCLE OPTIONS CAPACITY FACTOR OF OVER 87 CANDU REACTORS IN THE WORLD OPERABLE OR 31 BEING REFURBISHED Table of Contents The Enhanced CANDU 6 .............................................................4 Instrumentation and Control................................................... 24 EC6 Evolution ........................................................................................... 6 EC6 Control Centre .............................................................................25 Key Passive Safety Features............................................................... 6 SMART CANDU® Software Suite.....................................................26 Plant Design...................................................................................7 Electrical Power System...........................................................27 Plant Layout.............................................................................................. 7 Nuclear Safety.............................................................................28 Reactor Building ...................................................................................... 8 Defence-in-Depth and Inherent Safety Features ......................29 Service Building ....................................................................................... 9 Severe Accidents...................................................................................30 Turbine Building....................................................................................... 9 Severe Accident Recovery Nuclear Power Plant Siting ......................................................10 and Heat Removal System................................................................30 Unit Output..............................................................................................10 CANDU Project Delivery............................................................31 Adaptation to Site Requirements....................................................10 Design Engineering...............................................................................31 Nuclear Systems.........................................................................11 Licensing ..................................................................................................31 Heat Transport System.......................................................................12 Conÿguration Management...............................................................31 Steam Generators.................................................................................12 Project Management ...........................................................................31 Heat Transport Pumps........................................................................13 Procurement...........................................................................................32 Heat Transport Pressure and Inventory Control System.......13 Construction Programs.......................................................................32 Moderator System ................................................................................14 Construction Strategy.........................................................................32 Reactor Assembly.................................................................................15 Operations and Maintenance .................................................. 33 Reactor Control......................................................................................16 Plant Performance ...............................................................................33 Fuel Channel Assembly......................................................................16 Features to Enhance Fuel Handling and Storage System................................................ 17 Operating Performance ......................................................................33 Fuel.............................................................................................................18 Features that Facilitate Maintenance............................................34 Emerging Fuel Cycles..........................................................................19 Radioactive Waste Management.............................................35 Safety Systems......................................................................................20 Modular Air-Cooled Storage (MACSTOR®)..................................36 Shutdown Systems ..............................................................................20 Technology Transfer and Localization....................................37 Emergency Core Cooling System ...................................................21 Program Details.....................................................................................37 Containment System ..........................................................................21 Emergency Heat Removal System.................................................21 Summary ..................................................................................... 38 Evolution...................................................................................................38 Balance of Plant..........................................................................22 EC6 Improvements...............................................................................38 Turbine-Generator and Auxiliaries..................................................22 Steam and Feedwater Systems.......................................................23 EC6 Nuclear Power Plant Diagram ....................................... 39 Balance of Plant Services..................................................................23 Service Water Systems.......................................................................23 Heating, Ventilation and Cooling Systems....................................................................................23 Fire Protection System........................................................................23 EC6 Technical Summary 3 The Enhanced CANDU 6 The Enhanced Candu 6® (EC6®) is a Generation III, The EC6 reactor design offers: 700 MWe class heavy-water moderated and cooled > Natural uranium fuel with on-line fuelling pressure tube reactor. Heavy water (D O) is a natural 2 > High localization potential form of water that is used as a moderator to slow down the neutrons in the reactor, enabling the use > Suitability for small and medium sized electric grids of natural uranium as fuel. This feature is unique to > Superior safety performance and economics CANDU reactors. The choice of D2O as the moderator > A proven design based on the highly successful also allows other fuel cycles to be used in CANDU CANDU 6 reactors reactors. The use of natural uranium fuel in our EC6 reactors permits fuel cycle independence and avoids having to deal with complex issues such as reprocessing and enrichment. Technology transfer for localizing fuel manufacture is simple and has been achieved very successfully in a number of countries. 4 EC6 Technical Summary The Enhanced CANDU 6 The Enhanced Candu 6® (EC6®) is a Generation III, The EC6 reactor design offers: 700 MWe class heavy-water moderated and cooled > Natural uranium fuel with on-line fuelling pressure tube reactor. Heavy water (D O) is a natural 2 > High localization potential form of water that is used as a moderator to slow down the neutrons in the reactor, enabling
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