Nuclear Energy - PowerPoint PPT Presentation

1 / 14
About This Presentation
Title:

Nuclear Energy

Description:

Nuclear Energy About 20% of US electricity is from nuclear power plants. Nuclear Energy A nuclear reactor uses heat from a controlled fission reaction This is used to ... – PowerPoint PPT presentation

Number of Views:188
Avg rating:3.0/5.0
Slides: 15
Provided by: dju58
Category:

less

Transcript and Presenter's Notes

Title: Nuclear Energy


1
Nuclear Energy
  • About 20 of US electricity is from nuclear power
    plants.

2
http//www.nrc.gov/images/info-finder/reactor/rea
ctors-map.gif
3
Nuclear Energy
  • A nuclear reactor uses heat from a controlled
    fission reaction
  • This is used to create the steam needed to
    generate electricity.

http//www.converdyn.com/industry/images/chain-re
action.gif
4
Nuclear Energy
  • Control Rods are used in the core to make sure
    the fission reaction does not create too much
    heat.
  • Made from Boron or Cadmium

Click Here for a Demo.
http//www.pplweb.com/NR/rdonlyres/2FD20393-1529-
462D-BF8D-266B8B3AC063/0/diagram_controlrod.gif
5
The core of a reactor.
Cerenkov radiation
http//echelon1.mit.edu/nate/reactor/cerenkov.jp
g
6
http//www.npp.hu/mukodes/kepek/navegre-e.jpg
7
http//www.johnharveyphoto.com/RoadTrip/NuclearRe
actor.jpg
Cooling Tower, not the reactor!
8
http//www.eia.doe.gov/cneaf/nuclear/page/at_a_gl
ance/states/tn_chattanooga20.jpg
9
Nuclear Energy
  • Nuclear fuel is Uranium Dioxide (UO2)
  • 3-5 of U-235 isotope must be present.
  • Remember U-238 is most abundant! (only 0.7 is
    U-235)

http//americanhistory.si.edu/tmi/images/02.09_th
umb.jpg
10
Uranium Soil Concentrations
http//upload.wikimedia.org/wikipedia/en/1/12/Ura
niumdisstribution.jpg
11
Nuclear Energy
  • Pros
  • No air pollutants.
  • No carbon dioxide.
  • Overall efficiency around 35, same as fossil
    fuel plants.
  • Only 0.03 per kWh of energy produced (but larger
    start-up costs)

12
Nuclear Energy
  • Cons
  • Mining for uranium.
  • Disposal of nuclear waste.
  • Possible release of radioactivity.
  • RBMK Reactor (Chernobyl) vs. LWR Reactor (United
    States)

http//www.nrc.gov/waste/spent-fuel-storage/spent
-fuel-stor-locations.gif
13
RBMK Reactor (Chernobyl)
If H2O is lost, reaction speeds up!
14
LWR Reactor (United States)
http//casenergy.org/wp-content/uploads/2009/09/s
tudent-bwr.gif
If H2O is lost, reaction slows down!
Write a Comment
User Comments (0)
About PowerShow.com