1. a generation ahead by design SMR -160 An Unconditionally Safe Source of Pollution-Free Nuclear Energy for the Post-Fukushima Age 1 By Dr. Kris Singh Holtec International HOLTEC CENTER 1001 U.S. Highway 1 North Jupiter, Florida 33477, USA March 28, 2012

2. a generation ahead by design SMR-160 is being developed by SMR LLC, a subsidiary of Holtec International Enhanced Safety and Security (“Fukushima-proof”) –passive safety features, underground core, secure, smaller “source term” Attractive Investment Opportunity –lower initial capital investment, shorter construction duration, lower operational costs, quicker return on investment, low carbon emissions It is SMR-160’s mission to light up the ill- lit areas on the globe with affordable pollution free energy SMR 160 – A New Paradigm for Nuclear Energy 2This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

3. a generation ahead by design Enhanced Safety & Security Features –The reactor core is located deep underground –Passively cooled for design basis shut down. The reactor coolant system continues to circulate by thermo-siphon action during accident scenarios. –The containment is a steel structure that will serve to dissipate heat to the environment using passive cooling for a design basis event. –Large pipe break Loss Of Coolant Accident (LOCA) rendered non-credible by design: no large piping in the Reactor Coolant System (RCS) loop. –Fuel is protected by airplane crash resistant containment and by a missile shield over the spent fuel pool that is inside the containment An Overview of SMR-160 Key Technology Differentiators 3This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties. Elevation -105’ Elevation -43’ Elevation 0’ Front Section View Elevation 91 ’

4. a generation ahead by design Enhanced Safety & Security Features (cont’d) –The reactor system is designed to withstand the strongest Design Basis Earthquake postulated for any existing U.S. or international nuclear plant location. –Tall column of water above the reactor core – large coolant inventory (antidote to LOCA). –Fuel is protected by the airplane crash resistant containment and by a missile shield over the pool. –The RCS, fuel pool and small break LOCA are passively cooled during a station black out event –All safety systems are inside the containment. –Diesel power only for DC battery charging. An Overview of SMR-160 Key Technology Differentiators (cont’d) 4This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

5. a generation ahead by design Enhanced Operational Features –One vertically oriented steam generator, minimizes the containment diameter and maximizes the buoyancy head. –No pumps required for normal operations. The reactor coolant system circulates by thermo-siphon action. –Reactor pressure is controlled by pressurized nitrogen. –No high pressure turbine, only low pressure for single power loop –Provide highly reliable Active non-safety systems to enhance reliability –The fuel pool and the reactor cavity are configured for underwater transfer of the “fuel cartridge” as a unitary structure to minimize the duration of the outage. An Overview of SMR-160 Key Technology Differentiators (cont’d) 5This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties. Elevation -105’ Elevation -43’ Elevation 0’ Front Section View Elevation 91 ’

6. a generation ahead by design Enhanced Operational Features (cont’d) –Refueling cycle is 3.5 years min –Reactor Core cooled by natural circulation, which means a reduced level of turbulence around the fuel assemblies, which will ameliorate the age-old problem of fretting damage to the fuel rods at grid strap locations –All primary side welds are readily inspectable – ASME Section XI-friendly. –All internal surfaces of the reactor coolant system are made of ductile stainless steel. –Corrosion and crud accumulation in the reactor vessel will be minimal. An Overview of SMR-160 Key Technology Differentiators (cont’d) 6This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

7. a generation ahead by design Enhanced Operational Features (cont’d) –In-containment wet, and underground dry storage of spent fuel. –Air cooled condenser option is available. Integral pressurizer (eliminate large external piping) with pressure controlled by regulated nitrogen. Steam generation with superheating to maximize turbine blade life No reactor coolant pump; no moving parts in the primary flow circuit (Holtec patent). No boron in the reactor coolant in normal operation (to simplify system operations and mitigate internal corrosion/crud formation in the reactor system). An Overview of SMR-160 Key Technology Differentiators (cont’d) 7This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties. Elevation -105’ Elevation -43’ Elevation 0’ Front Section View Integral Pressurizer Super Heater Steam Generator

8. a generation ahead by design Fuel packaged in a Unitary Cartridge (Holtec Patent) –Refueling occurs by changing out a single cartridge. Facilitates rapid refueling –Specialized tooling required to remove fuel –Design hardened against security threats Fuel Cartridge is a multi-function device serves as: –a fuel rack in the pool –a “fuel basket” for dry storage An Overview of SMR-160 Key Technology Differentiators (cont’d) 8This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

9. a generation ahead by design Fuel assembly emulates a proven design extensively used in PWRs Fuel nozzles redesigned to facilitate loading in a cartridge and maximize natural circulation An Overview of SMR-160 Key Technology Differentiators (cont’d) 9This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

10. a generation ahead by design Control Rod Drive System designed to preclude the risk of rod rejection. Control Rod Drive Mechanism is located in plain view atop the Reactor Vessel (RV) head (eliminate the risk inherent to CRDM located inside the RV). An Overview of SMR-160 Key Technology Differentiators (cont’d) 10This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

11. a generation ahead by design Underground location of safety systems to provide: –Maximum protection from external natural events. –Maximum protection from malevolent human intervention. –Minimum occupational and off-site dose. In the event of a station black-out (Fukushima accident), the reactor’s post-scram heat is rejected to the atmosphere by purely passive means (Holtec patent). Spent fuel pool cooled by a passive system – no pumps, no reliance on off-site power or emergency diesel generators. (Holtec patent) An Overview of SMR-160 Key Technology Differentiators (cont’d) 11This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

12. a generation ahead by design SMR-160’s waste heat rejection can be directly to air (reliance on a natural water source for cooling virtually eliminated, if desired). Holtec provides innovative air cooled condensers in two configurations: –HI-MAX which is a horizontal A-frame design –HI-VACC which stands for Holtec International Vertical Air Cooled Condenser An Overview of SMR-160 Key Technology Differentiators (cont’d) 12This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties. HI-MAX™ SS - First Generation Tube HI-VACC

13. a generation ahead by design Containment Structure Overview 13 Finned External Water Tank/ Containment Vessel Head Finned Containment Shell Lower Containment Shell Bolted Joint Longitudinal Fins Containment Structure Elevation View Containment Structure Plan View This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

14. a generation ahead by design Overview of Nuclear Steam Supply System 14This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties. Super Heater Pressurizer Steam Generator Superheated Steam Line To Turbine Reactor Vessel Head Reactor Vessel Support Structure

15. a generation ahead by design o Enhance natural circulation in the core o Minimize RCS return water temperature and maximize buoyancy head o Minimize primary loop pressure drop and maximize core circulation o No Reactor Coolant pumps o Cycle efficiency over 30% ( Turbine Power Output – MW / Reactor Thermal Power MWt ) o Integrate steam superheating in the power cycle o Maximize turbine blade life o Use Industry lessons to prevent turbine blade damage by superheating steam and eliminating moisture o Simplified Steam Cycle for enhanced reliability o Single Feedwater Heater train and no Moisture Separator Reheaters (MSRs) o Use safety related passive systems within the containment with loss of offsite power (station blackout) to cool reactor coolant, spent fuel pool, and containment Power Cycle Design Objectives 15 This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

16. a generation ahead by design 16 Power Cycle o Design for Reactor Coolant System: o Core Thermal Output: 525 MWt o Reactor Water Temperature: 600 F o Reactor Water Flow Rate: 7,100,000 lbm/hr o Primary Loop Pressure Drop: 7 psi o Power loop (main steam, turbine, and feedwater) are active non-safety related o Ultimate heat sink can use air cooled condenser to minimize water usage o Active power systems when available support normal start-up and shutdown o Active power systems do not support safety related passive cooling systems o Nominal Turbine Output: 160 MWe This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.

17. a generation ahead by design SMR-160 is engineered to provide safe, reliable, clean energy to support the world’s growing population and energy needs Distributed power generation eliminates reliance on a robust transmission grid Sized to supply off-the-grid independent energy to vital infrastructure assets such as national labs & defense installations Ideally sized for cogeneration & desalination plants Concluding Remarks 17This presentation material’s ownership by Holtec International is protected by international laws on intellectual properties.