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NUCLEAR ENERGY Safe, Clean Power for the Future
Dr. Peter Lyons Assistant Secretary for Nuclear Energy
U.S. Department of Energy
Georgia Institute of Technology 50th Anniversary Celebration
Founding of the School of Nuclear Engineering 1962 Symposium on the Future of Nuclear Energy
November 1, 2012
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Global Energy Distribution
as indicated by nighttime electricity use
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Australia U.S
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Germany
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Germany
Russia
China
Sudan
Zimbabwe
Pakistan
Per Capita Electricity Consumption (kWh)
Very high quality of life
High quality of life
Medium quality of life
Low quality of life
Human Development Index - Human Development Report 2010, United Nations (2009 data)
Per Capita Electricity Consumption (kWh) - Key World Energy Statistics, International Energy Agency (2009 data)
Norway
India
Correlation Between Human Development Index and Per Capita
Electricity Consumption, 2009
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Nuclear power is clean, reliable base load energy source
Provides 19% of U.S. electricity generation mix
Provides over 61% of U.S. emission-free electricity
Avoids about 700 MMTCO2 each year
Helps reduces overall NOx and SOx levels
U.S. electricity demand projected to increase ~24% by 2030
100 GWe nuclear capacity - 104 operating plants
Fleet maintaining approximate 90% average capacity factors
Most expected to apply for license renewal for 60 years of operation.
Nuclear Energy Plays an Important Role in US Energy Supply
Nuclear 19%
Total 4,106 BkWh
U.S. Electricity Net Generation (2011) Source: Energy Information Administration
Nuclear 61%
Conventional Hydroelectric
25%
Wind 9%
Solar 0%
Geothermal 1%
Other 4%
Net Non-emitting Sources of Electricity Source: Energy Information Administration
5
President Obama’s Nuclear Energy Goals
“We can build the next-generation nuclear reactors that are smaller and
safer and cleaner and cheaper.”
Ohio State University-March 22, 2012
“With rising oil prices and a warming
climate, nuclear energy will only become more important. That’s why, in the United States, we’ve restarted
our nuclear industry as part of a comprehensive strategy to develop
every energy source.”
Seoul, Korea - March 26, 2012
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Nuclear Energy Objectives
Develop technologies and other solutions that can improve the reliability, sustain the safety, and extend the life of current reactors
Develop improvements in the affordability of new reactors to enable nuclear energy to help meet the Administration's energy security and climate change goals
Develop sustainable nuclear fuel cycles
Understand and minimize the risks of nuclear proliferation and terrorism
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Recent Key Events
Fukashima Dai-ichi Accident
Blue Ribbon Commission on America’s Nuclear Future- Final Report Issued January 26, 2012
Small Modular Reactor Program Approved
AP 1000 Design Certification and Combined Construction and Operating License (COL) Issued
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Fukushima Dai-ichi – U.S. Responses
President Obama asked the NRC to “do a comprehensive review of the safety of our domestic nuclear plants in light of the natural disaster that unfolded in Japan”
Secretary Chu stated, “the Administration is committed to learning from Japan’s experience as we work to continue to strengthen America’s nuclear industry”
Marvin Fertel, President & CEO Nuclear Energy Institute: “The industry’s highest priority is the safe operation of the 104 reactors in 31 states and we will incorporate lessons learned from this accident at American nuclear energy facilities”
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DOE/NE Research Impacts: Post-Fukushima
Reducing the need for operator actions in accident response enhances overall safety.
Passive Systems enhance safety
– AP1000, ESBWR, SMRs, HTGRs
Better understanding of dry cask storage systems.
Re-engineering barriers can reduce complications.
SiC cladding
Enhanced fuel properties
Re-evaluation of potential natural phenomena.
Re-evaluation of U.S. seismic criteria
Targeted use of Modeling and Simulation.
Improved modeling of operating reactors
Enlistment of the University Community.
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Passive Safety Features of Modern Reactors
Passive Safety Systems utilize naturally occurring physical phenomena such as natural circulation of air, water and steam.
Gravity and convection drive the flow of cooling water.
There are no safety-related pumps and motor-operated valves.
There is no need for safety-rated diesel generators.
Reactor safety functions are achieved without using any safety-related AC power
reliance on “stored” energy
PASSIVE SYSTEMS IN THE UNITED STATES The U.S. NP2010 Program advanced the AP1000 and ESBWR passive safety
designs
SMRs offer extensive passive safety features
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Rapid Core Degradation Due to Enthalpy Production by Zr Oxidation at T>1200ºC
Steam Temperature = 600°C constant
Heat-transfer coefficient from cladding OD to steam = 5×10-4 W/cm2-K
• Cladding temperature increases after exposure to steam due to decay heat
production
• At T>1200ºC self catalytic oxidation rapidly drives cladding temperature and
results in full consumption of the cladding
Period of time after
SCRAM where
water injection into
the core is
available
0 10 20 30 40 50 60
500
1000
1500
2000
2500
3000
3500
C
lad
din
g T
em
pe
ratu
re [C
]
Time after fuel exposure to steam [min]
cladding fully
consumed
Cooling Period
2 hrs
8 hrs
24 hrs
72 hrs
NRC 1204°C PCT limit
Longer cooling period = Less decay heat
*Slide provided by Oak Ridge National Lab*
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Materials With Slower Oxidation Kinetics Offer Larger Margins of Safety
• Materials with slower oxidation kinetics in steam (~ 2 orders of magnitude
or less) delay rapid cladding degradation
Fuel exposed after
24hrs of cooling
Relative to Zr
oxidation kinetics
*Slide provided by Oak Ridge National Lab*
13
Used Fuel Generation
Each year, U.S. nuclear power plants generate ~2,200 metric tons of used fuel
Contained in the 2,200 tons of used fuel is about 20 tons of plutonium
There is currently about 64,000 MT of used fuel stored in the US
This fuel is stored in water pools or dry casks at 72 plant sites in 39 states (includes DOE used fuel)
The legislated capacity for Yucca Mt. was 63,000 MT before a second repository was licensed
Projected used fuel quantity in storage by 2035 will be about 120,000 MT
The current policy for UNF is direct geologic disposal
Siting a repository appears to be a challenge for the US
At least one repository will be needed for any option
14
Blue Ribbon Commission Recommendations
1. A new, consent-based approach to siting future nuclear waste management facilities.
2. A new organization dedicated solely to implementing the waste management program and empowered with the authority and resources to succeed.
3. Access to the funds nuclear utility ratepayers are providing for the purpose of nuclear waste management.
4. Prompt efforts to develop one or more geologic disposal facilities.
5. Prompt efforts to develop one or more consolidated storage facilities.
6. Prompt efforts to prepare for the eventual large-scale transport of spent nuclear fuel and high-level waste to consolidated storage and disposal facilities when such facilities become available.
7. Support for continued U.S. innovation in nuclear energy technology and for workforce development.
8. Active U.S. leadership in international efforts to address safety, waste management, non-proliferation, and security concerns.
15
Sustainable Fuel Cycles
Goals
─ In the near term, define and analyze fuel cycle technologies to develop options that increase the sustainability of nuclear energy
─ In the medium term, select preferred fuel cycle option for further development
─ By 2050, deploy preferred fuel cycle
Challenges
– Develop high burnup fuel and structural materials to withstand irradiation for longer periods of time
– Develop simplified separations, waste management, and proliferation risk reduction methods
– Develop optimized systems to maximize energy production while minimizing waste
16
Uranium Extraction from Seawater Winner of R&D100 Award in 2012
U.S. R&D Efforts Focus on –
• Increase U sorption capacity and selectivity in seawater environment
surface area; functional group density;
grafting efficiency;
• Enhanced ligand design
computational modeling of functional ligands, hard/soft donors, stereochemistry
• Enhance adsorbent durability
Increase the number of recycles/reuse; Improve U stripping methodology
• Understanding sorption mechanism, kinetics, and thermodynamics
Vast potential resource in seawater: ~4.5 billion tonnes U - provide a price cap and ensure centuries of uranium supply even
with aggressive world-wide growth in nuclear energy applications
Seawater Uranium Sorption Capacity (g U/kg Adsorbent @20°C)
Challenge is low concentration: ~3.3 ppb in seawater
PNNL Independent Verification20 °C
Flow-rate = 500 mL/min
Days of Exposure
0 10 20 30 40 50 60
µg
Ura
niu
m /
g a
dso
rben
t
0
500
1000
1500
2000
2500
3000
Uranium
Replicate
Japanese Sorbent
ORNL Cartridge
Ligand Saturation Model
U.S. sample 2.75 Japanese sample 0.92
17
Why are SMR technologies of interest to DOE?
Safety Benefits
Passive decay heat removal by natural circulation
Smaller source term inventory
Simplified design eliminates/mitigates several postulated accidents
Below grade reactor siting
Potential for reduction in Emergency Planning Zone
Economic Benefits
Reduced financial risk
Flexibility to add units
Right size for replacement of old coal plants
Use domestic forgings and manufacturing
Job creation
NE working definition of SMRs: reactor units with a nominal output of 300 MWe or less and are able to have large components or modules fabricated remotely and transported to
the site for assembly of components and operation.
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SMR Licensing Technical Support Program
Modeled After NP 2010 Program $1.4B Joint government-industry program to overcome barriers to new reactor
deployment 50-50 cost-share between government and industry
Results: Three Early Site Permits (North Anna, Grand Gulf, Clinton)
Two Design Certification applications (AP1000 received, ESBWR 2012)
Two Construction and Operating Licenses issued (Vogtle, Summer)
Current Program:
Goal is design certification of up to 2 SMR designs
Supports first phase for deployment
Facilitates and accelerates commercial development and deployment of near term U.S. SMR designs at domestic locations
$452 M in cost-share program over 5 years
FY12 funding is $67M and FY13 request is $65M
19
Renewed Interest in Nuclear Energy
Early Site Permits: 4 early site permits approved for Clinton, Grand Gulf, North Anna sites, and Vogtle; additional permit applications filed.
License Applications: 18 Construction and Operating License applications for 28 new reactors have been submitted for NRC review; Areva and USEC enrichment licenses filed; 73 reactor license renewals approved.
Reactor Design Certifications: Four designs have been certified; three new designs (APWR, EPR, and ESBWR) are under review; ESBWR through ACRS; AP1000 certified.
New Plant Orders: 4 plant construction contracts initiated; 9 power companies have placed large component forging orders.
Plant Construction: TVA construction activities at Watts Bar 2, and reinstated construction permits for Bellefonte 1 and 2. LES enrichment plant operating. Vogtle and Summer COL issued.
Financial Incentives: Conditional loan guarantees approved for Vogtle and Eagle Rock.
Small Modular Reactor Program: Administration support for multiyear SMR Licensing and Deployment Program. $65M requested in FY13. Issued FOA April 22, 2012.
20
AP1000 Construction Sanmen, Vogtle, and Summer
Sanmen- January 2012
Vogtle – March 2012
Summer - May 2012
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Nuclear Energy University Program
Initiated in 2009: Funds nuclear energy research and equipment upgrades at U.S. colleges and universities.
NEUP has awarded $233 M to 81 schools in 34 states and the District of Columbia
NEUP plays a key role in helping DOE accomplish its mission in the development and exploration of advanced nuclear science and technology.
GT has been a major recipient of NEUP awards: 23 awards totaling $12.6 million in the form of scholarships, fellowships, R&D, or general scientific infrastructure and most recently the 2012 Integrated Research Project on Integral Inherently Safe Light Water Reactor
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Requested Budget: $5,999,784
PI: Bojan Petrovic
Collaborators: University of Michigan, Virginia Tech, University of Tennessee, University of Idaho, Morehouse College
Foreign Involvement: Polytechnic University of Milan, University of Cambridge ($450K to be provided by RCUK)
Industrial Participation: Westinghouse Electric ($600k), Southern Nuclear
($135k) National Laboratory Participation: INL ($300k)
Georgia Institute of Technology Integral Inherently Safe Light Water Reactor
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Congratulations on 50 Years of Success
GIT was one of the first undergraduate programs in nuclear engineering to be accredited.
Highly successful in NE’s Competitive University programs winning awards under NERI and NEUP over the past 10 years
GIT has a long history of R&D and collaboration on NE related programs in reactor design, fuels design, nuclear hydrogen production and nuclear theory and physics.
Much of the early work at Georgia Tech provided data for support of the controlled thermonuclear reactor at Oak Ridge, Tennessee. High-energy beam studies fostered development of neutral beam injectors to heat and fuel such reactors.
In 2010, GIT was ranked in the top five for number of Nuclear Engineering degrees awarded, with 56 degrees issued. (Oak Ridge Institute for Science and Education)
The 2012 Integrated Research Project is potentially leading the way to the next generation of LWR nuclear reactors
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Backup Slides
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Integral Inherently Safe Light
Water Reactor
… high-power (~1,000 MWe) LWR with inherent safety features. The enabling innovations include the use of high power density technologies/components, a compact core design achieved by using a non-oxide fuel form with improved heat removal capability, combined with fuel/clad design of enhanced accident tolerance. This allows increasing core power density while at the same time improving the core safety performance and response in transient/accident scenarios. A novel steam generating system is based on very compact printed circuit heat exchangers (PCHE) which make a 1,000 MWe power level “compatible” with an integral configuration.
The compact design leads to a small plant footprint, which helps reduce the construction cost and facilitates deployment of seismic isolators.