Enhanced CANDU 6 Safe, dependable and clean energy solutions The SNC-Lavalin Solution Enhanced CANDU 6 Built on the proven success of CANDU® nuclear technology, With more than a century of experience in the and including the most recent safety and technical advances, power sector, and over 60 years invested in the Enhanced CANDU 6® (EC6®) is a Generation III 700 the nuclear industry, SNC-Lavalin develops MWe class nuclear power plant that builds on decades of successful commercial CANDU deployment with natural nuclear projects tailored to our clients’ needs. uranium fuel. The EC6 reactor is project ready for on- Safety, quality, innovation and excellence in schedule construction and commissioning with high safety project execution are the values we live by margins and reliable, economic and competitive electricity production. It is able to respond to daily cyclic load demands. every day. Ideal for minimizing costs required for grid and transmission Our nuclear team brings its expertise to enhancement, the EC6 benefts from the CANDU 6® both the light water and heavy water reactor experience of proven design, construction and operation. It markets. We strive to “think like an operator” has a heavy-water moderator and heavy water coolant in a pressure tube design and can be refuelled on power. CANDU to provide innovative and proven solutions to reactors have some of the highest lifetime capacity factors issues before they arise. among the world’s reactors. In 2013, the EC6 successfully completed the third and fnal phase of the pre-licensing vendor design review by the Canadian Nuclear Safety Commission (CNSC). The CNSC confrmed that there are no fundamental barriers to licensing the EC6 design in Canada. Our Gen III Reactor Family Designed with Customers in Mind The EC6 is the frst member of our Generation III reactor The EC6 incorporates strong operational utility experience family. As such, it incorporates safety enhancements for from CANDU operators around the world. CANDU reactors Generation III reactor designs and meets the latest Canadian use a unique technology designed to allow for on-power and international standards. It incorporates lessons learned refuelling and online maintenance, and SmartCANDU® for from many years of operations feedback. It also incorporates equipment conditions monitoring. Utilities in Canada, Asia, lessons learned from event management at Fukushima. Europe and South America rely on CANDU technology to deliver higher lifetime capacity factors than competing The EC6 is the reference design for its sister product, the technologies. Advanced Fuel CANDU Reactor (AFCR), which has an optimized core for using recycled uranium or thorium fuel. The third member of the family, which also shares the same A Tradition of Continuous Innovation reference design, is a MOX-ready adaptation of the EC6, The Generation III EC6 reactor builds on over 40 years which has been optimized for mixed oxide fuels. of experience of delivering CANDU reactor solutions to a global operator base. The EC6 is ready for deployment EC6 Generation III enhancements include: to operators requiring high safety margins, on-schedule > Extended plant life of 60 years construction, high capability, economic competitiveness > Increased safety and operating margins and operational reliability. The EC6 advances the CANDU > Flexible fuel cycle capability design to a new level of performance, incorporating > Robust design against internal and external threats fuel-related advantages while retaining the provenness of the reactor fundamentals. Features that beneft > Inherent accident resistance from this long track record of success include: > Enhanced passive and active safety features for extended station blackout > Horizontal fuel channels > Enhanced core damage prevention and severe accident > On-power refuelling mitigation features by active and passive provisions > Fuel design that is simple, easy to handle and manufacture > Separate low-pressure heavy water moderator > Water-flled reactor vault 5 > Active and passive core cooling capability 6 > Two independent, fast-acting shutdown systems > Inherent emergency cooling capability 4 > Accessible reactor building for on-power maintenance 2 9 3 8 1. Calandria THE EC6 IS DESIGNED FOR AN 7 10 1 2. Steam Generators 3. Heat Transport Pumps average lifetime 4. Pressurizer capacity factor of 5. Reserve Water Tank 6. Low Flow Spray more 7. Fuel Machine than 8. Reactivity Mechanism Deck FOR A 6092%-YEAR OPERATIONAL LIFE 9. Overheard Equipment Crane 10. Containment Fuel The EC6 uses natural uranium as fuel, permitting fuel cycle independence and avoiding complex issues of enrichment. Using natural uranium increases a country’s energy independence, as fuel can be manufactured locally. Technology transfer for localizing fuel manufacture is simple and has been achieved very successfully in a number of countries. CANDU fuel is safe, technically capable, economical and reliable. Dependable CANDU fuel fabrication capability is being delivered Advanced Safety and locally to operators across the globe. Environmental Features The EC6 incorporates the inherent safety features of globally deployed CANDU reactors that have safely operated for decades. The EC6 core design features fuel-related safety enhancements and safety performance required of Generation III reactors. from the fuel for postulated conditions arising from beyond Consistent with the concept of defence in depth, the EC6 design basis accidents (BDBAs). A large volume of water provides a series of inherent and engineered features, in the calandria vault that surrounds the calandria vessel equipment and procedures to prevent accidents and to provides the second passive heat sink and can further slow ensure appropriate accident mitigation. The EC6 maintains down or arrest severe core damage progression. multiple physical and fexible barriers to confne radioactive material at specifed locations and, ultimately, within the containment. The EC6 design provides a dedicated Following traditional CANDU reactor design practice, the severe accident recovery and heat removal EC6 incorporates two passive, fast-acting shutdown systems that are physically and functionally independent of each system (SARHRS) to minimize the risks of other. EC6 safety systems are designed to ensure reactor severe accidents. shutdown, remove decay heat and prevent radioactive releases during events and accidents. The principles of separation, diversity and high reliability apply to the design, Furthermore, the EC6 design also provides a dedicated including shutdown systems, emergency core cooling severe accident recovery and heat removal system system and containment systems. (SARHRS) to minimize the risks of severe accidents. This The traditional emergency water supply system has been system, which includes gravity-driven, passive water supply upgraded to become the emergency heat removal system lines and a pump-driven recovery circuit, is designed to (EHRS), operating as the engineered safety feature for loss arrest and contain any severe core damage within the of heat sink events, such as a main steam line break. The calandria vessel and ensure that the containment integrity EHRS can be used as an alternate heat sink for residual is maintained following a BDBA. The fxed pump-driven decay heat following postulated low probability accidents recovery circuit is backed up by the capability to connect that render normal heat sinks unavailable. High degrees emergency mobile equipment. of redundancy within systems ensure safety functions can For security and physical protection, the EC6 design be carried out. encompasses the required response to potential common CANDU reactor design has inherent safety features as mode events, such as fres, aircraft crashes and internal and defences against severe accidents. A cool and low-pressure external threats. CANDU reactor operation results in very moderator provides a passive heat sink to absorb decay heat low emissions, minimizing environmental impact. Track Record of International Success The last seven CANDU reactors have been built ahead of EACH TWIN REACTOR or on schedule and ahead of or on budget – the best track EC6 BUILD SAVES record of any nuclear vendor in the world. We are backed by a strong Canadian and international supply chain that has helped deliver successful CANDU reactor projects to our global customers. Up to MILLION 13 TONNES OF CO2 EMISSIONS/YEAR In 2013, the EC6 reactor successfully when displacing traditional coal completed its third and fnal pre-licensing vendor design review by the Canadian Up to Nuclear Safety Commission, confrming there MILLION are no fundamental barriers to licensing the 6 TONNES EC6 design in Canada. OF CO2 EMISSIONS/YEAR when displacing natural gas NUCLEAR OFFICE 2285 Speakman Drive Mississauga, ON, L5K 1B1, Canada Telephone: +1 905 823 9040 Email: [email protected] www.snclavalin.com/nuclear PRINTED IN CANADA ® Registered trademark of Atomic Energy of Canada Ltd. (AECL), used under licence by Candu Energy Inc., a Member of the SNC-Lavalin Group. 202_2015-05 .