nuclear fission versus nuclear 2015-10-08آ  nuclear fission versus nuclear fusion fission is the...

Download Nuclear Fission versus Nuclear 2015-10-08آ  Nuclear Fission versus Nuclear Fusion Fission is the release

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  • Nuclear Fission Nuclear Fusion

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    Fission is the release of energy by splitting heavy nuclei such as Uranium-235 and Plutonium-239 Fusion is the release of energy by combining two light nuclei such as deuterium and tritium

    How does a nuclear plant work? • Each fission releases 2 or 3 neutrons

    • These neutrons are slowed down with a moderator to initiate more fission events

    • Control rods absorb neutrons to keep the chain reaction in check

    Nuclear Power produces no greenhouse gas emissions; each year U.S. nuclear plants prevent atmospheric emissions totaling: • 5.1 million tons of sulfur dioxide

    • 2.4 million tons of nitrogen oxide

    • 164 million tons of carbon

    The energy from the reaction drives a steam cycle to produce electricity

    Moderator

    Uranium-235

    Uranium-235

    Slow Neutron

    Fission

    Fission Control Rods

    Moderator

    Neutron Neutron

    Neutron

    Neutron

    Target Nucleus

    Fission Product

    Fission Product

    Control Rods

    Reactor Vessel

    Steam Line

    Generator

    Containment Structure

    Pump

    Pump

    Cooling Water

    Condenser Control Rods

    Reactor Vessel

    Steam Line

    Gene

    Pump

    Turbine

    Deuterium-Tritium Fusion Reaction • The goal of fusion research is to confine fusion ions

    at high enough temperatures and pressures, and for a long enough time to fuse

    Tritium (H-3)Deuterium (H-2)

    3.5 MeV Alpha Particle

    (He-4)

    14.1 MeV Neutron

    There are two main confinement approaches • Magnetic Confinement uses strong

    magnetic fields to confine the plasma

    • The photo above is a cross-section of the International Thermo-nuclear Experimental Reactor (ITER) Tokamak which is being built in France1

    • Inertial Confinement uses powerful lasers or ion beams to compress a pellet of fusion fuel to the right temperatures and pressures

    • The photo to the left is a view of the target chamber at the National Ignition Facility (NIF) at Lawrence Livermore National Lab2

    Sources: 1. http://www.iter.org/album/media/7%20-%20technical#797 2. https://lasers.llnl.gov/multimedia/photo_gallery/target_area/?id=7&category=target_areaAmerican Nuclear Society www.NuclearConnect.org