TheLoomingEnergyCrisisandNuclearPower_000

TheLoomingEnergyCrisisandNuclearPower_000 - The Looming...

Info iconThis preview shows pages 1–12. Sign up to view the full content.

View Full Document Right Arrow Icon
The Looming Energy Crisis and Global warming: Is Nuclear Power the answer? Wednesday, August 02, 2006 Hartford Courant Romualdo deSouza, Indiana University
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Growing global energy needs ! With oil and natural gas prices expected to continue rising, coal is an attractive fuel for nations with access to ample coal resources …In particular, the United States, China, and India are well-positioned to displace more expensive fuels with coal, and together the three nations account for 86 percent of the expected increase from 2004 to 2030
Background image of page 2
Different sources of energy: Ethanol (Biofuels) 29% more fossil energy to turn corn into ethanol than the amount of fuel the process produces. Switch grass 45% Wood 57% “Ethanol production in the US does not benefit the nation’s energy security, agriculture, economy, or environment” --- David Pimentel, Cornell University and Tad Patzek, UC, Berkeley
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Hydrogen as a source of energy: Is it really? Hydrogen while plentiful in the universe, is found on earth in compounds. To produce H 2 , we need to liberate it from these compounds. Bond breaking takes energy! Hydrogen is best viewed as a storage medium.
Background image of page 4
One piece of evidence – correlation between CO 2 levels in Vostok ice core and temperatire change Global Warming (Climate change)
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Need to limit man-made generation of CO 2 i.e. limit combustion of carbon containing fuels. Global Warming (Climate change) http://www.grida.no/climate/vital/07.htm
Background image of page 6
Development of nuclear power by other countries China going nuclear in a big way 1. By 2020, China expects nuclear to grow from 2.3% to 4%. To meet that goal it must build 2 facilities every year! 2. By 2060, there are plans to have 1/3 of China’s power supplied by nuclear power. 3. Nuclear power facilities are being concentrated in heavily populated, industrialized areas where high levels of pollution exist. 4. Concentrating on fast reactor technology that improves efficiency of uranium usage by factor of up to 70.
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
 Z A 0 1 Z A+1 Z A 1 + Z A 2 X n X s X X n + Q 1 1 2 2 1    * 10 18 Bookkeeping: A + 1 = A 1 + A 2 + Z = Z 1 + Z 2 Q 180 MeV 2 10 10 kJ/mole E kinetic + E* 1 + E* 2 IF < > 1, chain reaction possible 160 MeV 20 MeV
Background image of page 8
The concept of cross-section If we “throw” a neutron at a nucleus what is the probability that the neutron causes a nuclear reaction? ) )( )( ( x I N For a beam of neutrons: N = reaction rate (reactions/s) I = Intensity (particles/s) X = target thickness (atoms/cm 2 ) = cross-section (barns) 1barn = 1b = 1 x 10 -24 cm 2
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Nucleus Abundance Cross- section (b) (n,f) Ave. number of neutrons 232 Th 100% 2 x 10 -4 238 U 99.27% 5x10 -4 235 U 0.72% 577 2.44 233 Th 530 2.51 239 Pu 742 2.89 Good in a breeder reactor ! Good fuel
Background image of page 10
Fuels Only U and Th of nature's elements undergo fission readily Reaction cross sections largest for thermal neutrons (0.03 eV @ 300 K) Global Uranium Resources to Meet Projected Demand Latest Edition of "Red Book" Predicts Consistent Supply Up to 2025 Staff Report 2 June 2006 ( http://www.iaea.org/NewsCenter/News/2006/uranium_resources.html) Uranium 2005: Resources, Production and Demand - also called the "Red
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 12
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 38

TheLoomingEnergyCrisisandNuclearPower_000 - The Looming...

This preview shows document pages 1 - 12. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online