Overview and Considerations for a Nuclear Plant Power Uprate

1. Subtitle (Arial 22 to 24) Overview and Considerations for a Nuclear Plant Power Uprate Jim Hill NMCPrairie Island Nuclear Plant - Add text to be highlighted here -

2. Agenda • Overview of an Uprate • Reactor Power • Turbine/Steam Cycle Optimization (efficiency) • Drivers of Uprate • Prairie Island Case Considerations • Importance of Uprate to Energy Supply

3. Typical Nuclear Steam Cycle Reheat Pressure MSR Reactor & Steam Generators Generator Live steam Turbine Condenser Cooling water Pump Feedwater Condenser Pressure Feedheating plant Final Feed Temp

4. Nuclear Uprate:MWe Sources Retrofitted Equipment • Reactor uprate • Steam Cycle/Condenser Extra Power • LP Turbine efficiency • HP Turbineefficiency Original Equipment Aging • Recover aging

5. Reactor Power Up-Rates Appendix K Upgrade (MUR)  <2% in Reactor Thermal Power Stretch Power Uprate  +7% Extended Power Uprate  up to 20% Reference: www.nrc.gov +1% in Reactor Thermal Power  +0.95% in Generator Output

6. Efficiency Capacity Reliability Steam Turbine Retrofits Retrofitting is the replacement of all or part of the steam turbine hardware to improve thermal performance, reliability, availability, maintainability and environmental impact Retrofit Drivers Retrofit Solution Original Design

7. Retrofit Solution Integration …is the integration of new components into existing equipment, within the defined turbine island boundary conditions • New components within the turbine island • Part of a bigger project including environmental control upgrades • Modification of the thermal cycle • Additional output to compensate for higher plant consumption • Capabilities in the area of the steam turbine island, boiler and environmental control systems are required

8. Uprate/Retrofit Drivers • Improved turbine efficiency and plant heat rate • Reduced fuel consumption and emissions • Increased MW capacity • Meet obligation to provide power • Added revenue • Improved reliability and availability • Reduced maintenance • Extended turbine life Significant additional power from an plant that has already been sited and constructed

9. PINGP Prairie Island Case Considerations

10. Tradeoffs NSSS – Reactor and Steam Supply • Less fuel efficiency with higher steam pressure • Incrementally closer to limits (less operating margin) BOP – Turbine Generator and Electrical System • More efficiency requires more complexity (integration of design and implementation) and cost • Incrementally closer to limits (less operating margin) Margin can be regained through additional changes

11. Mature Market Economies Transitional Economies Emerging Economies Gross Domestic Product (GDP) Projected growth in GDP over the next two decades: 2.5% Mature Market Economies 4.4% Transitional Economies 5.1% Emerging Economies

12. Figure 1. World Marketed Energy Consumption by Region, 1970-2025 History Projections 700 600 500 400 Quadrillion Btu 300 200 100 0 1970 1975 1980 1985 1990 1995 2002 2010 2015 2020 2025 Mature Market Economies Transitional Economies Emerging Economies World Marketed EnergyConsumption by Region Increase of 57% Over Only 23 Years

13. Figure 2. World Net Electricity Consumption by Region, 2002-2025 History Projections 30000 25000 20000 Billion Killowatthours 15000 10000 5000 0 2002 2010 2015 2020 2025 Mature Market Economies Transitional Economies Emerging Economies World Net ElectricityConsumption by Region Emerging economies: annular growth of 4% versus 2.6% world wide World Electricity Consumption will Nearly Double

14. % ofrespondents Environment: A Top Priority “Environmental questions are amongst my top 3 operational issues” Source: Customer interviews Increasing Environmental Awareness Worldwide

15. 4% 30% 60% 160 5% 1% 140 120 Others 100 Hydro 80 Nuclear Conventional Steam 60 Gas Plant (GT & CC) 40 20 0 1 6 11 16 21 26 31 36 41 46 World Installed Capacity by Age and Technology 28 % of Installed Capacity is Older than 30 Years GW Technology Share of Old Fleet > 30 Years Old Fleet: 1138 GW Tot. Installed: 4100 GW Source: ALSTOM, UDI Age of Power Plant Year of 2004 1974 1964 1994 1984 Commission Past Technology is Still in Operation

16. 43% 3% 3% 13% 36% 160 2% 140 120 China 100 Asia excl. China South & Central America 80 Middle East & Africa North America 60 Europe 40 20 0 1 6 11 16 21 26 31 36 41 46 World Installed Capacity by Age and Region 28 % of Installed Capacity is Older than 30 Years GW Technology Share of Old Fleet > 30 Years Tot. Installed: 4100 GW Old Fleet: 1138 GW Source: ALSTOM, UDI Age of Power Plant Year of 2004 1974 1964 1994 1984 Commission

17. Global Steam Turbine Retrofit Market Forecast History Projections 1000 900 800 700 600 Market Volume (MEuro) 500 400 300 200 100 0 01-02 02-03 03-04 04-05 05-06 06-07f 07-08f 08/09f Mature Market Economies Transitional Economies Emerging Economies China, India, S-E Asia and Russia Progressively Become More Important

18. Retrofit Market USA 25.000,00 315 Gigawatts or 95% of coal fired units are older than 20 years older than 20 years 20.000,00 15.000,00 Installed capacity (MW) 10.000,00 5.000,00 0,00 1947 1957 1967 1977 1987 1997 Commissioning date Includes steam turbines >100MW at coal fired stations

19. Retrofit Market USA • Mature market economy • Important retrofit market • Very competitive business environment for the utilities • Major spending for environmental control systems • Coal fired and nuclear units operate at high utilization factors

20. Questions? More information at: Nuclear Energy Institute www.nei.org Nuclear Regulatory Commission www.nrc.gov Thank You!