12_-_Fission___Fusion

12_-_Fission___Fusion - Fission Model Chain reaction 1...

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Fission Model
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Chain reaction 1
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Chain Reaction 2
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Critical Mass The probability of a neutron colliding with a nucleus increases as the ratio between the surface area and the volume decreases. When the critical mass is reached the chain reaction occurs. If the chain reaction is uncontrolled, we have an explosion (a bomb). If the chain reaction is controlled, we have an nuclear reactor. Non Critical Mass Non Critical Mass Critical Mass
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Critical Mass A (simulated) sphere of plutonium surrounded by neutron-reflecting blocks of tungsten carbide.
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First Nuclear Reactor A painting of the first nuclear reactor, assembled during World War II on a squash court at the University of Chicago by a team headed by Enrico Fermi. This reactor, which went critical on December 2, 1942, was built of lumps of uranium embedded in blocks of graphite. It served as a prototype for later reactors whose purpose was to manufacture plutonium for the construction of nuclear weapons.
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This note was uploaded on 02/21/2009 for the course PHY 3425345 taught by Professor Dr.schrieber during the Spring '08 term at TCNJ.

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12_-_Fission___Fusion - Fission Model Chain reaction 1...

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