Minu Jung Brian Park Nuclear Power. Introduction The need for an alternative energy.

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Presentation transcript:

Minu Jung Brian Park Nuclear Power

Introduction The need for an alternative energy

What is nuclear power? Nuclear power is the use of sustained nuclear reactions to generate energy Nuclear reactions can be divided into fission and fusion

History: The Atomic Model and the Nucleus Rutherford The discovery of the nucleus (1898)

History: The Atomic Model and the Nucleus Chadwick Discovery of the Neutron (1932) Chadwick

History of Nuclear Physics: Henri Becquerel Discovery of the radioactive decay (1896) Henri Becquerel Discovery of the radioactive decay (1896)

History of Nuclear Physics: Rutherford Artificial transmutation (1917) Rutherford

History of Nuclear Physics: Enrico Fermi Fission! (1934) Enrico Fermi Fission! (1934)

Fission: What is it?

Equation: Key: 235-Mass Number 92- Atomic number U- Chemical Symbol for Uranium

Fission Video:

Why is energy produced? Mass defect: Mass of sum of individual nucleons < mass of nucleus Binding Energy: ‘Missing’ mass is energy holding the nucleus together The energy released is E=∆mc 2

Binding Energy per nucleon

Practice Question: Uranium Energy per nucleon = 7.6MeV Barium Energy per nucleon = 8.3MeV Krypton Energy per nucleon= 8.8MeV How much energy is produced from this fission reaction?

Answer: U(235): 235*7.6 MeV = 1786MeV Ba(144): 144*8.3 MeV = 1195MeV Kr (89): 89*8.8 MeV =783MeV Ba+Kr = 1978 MeV U - (Ba+Kr) = 192 MeV

Fusion: What is it? Fusion is the nuclear reaction where small nuclei join together into larger nuclei and release energy in the process.

Example of Fusion: Hydrogen

Binding Energy per Nucleon

Possibilities of Fusion

HOW DO REACTORS WORK? 2 Types of Reactors: Boiling Water Reactor (BWR) Pressurized Water Reactor (PWR)

Efficiency of Nuclear Power

Pros

Cons: Nuclear Waste Disposal Expensive disposal: $96B US Long Hazardous Life = Half lives

Cons: Consequences of Nuclear Disaster If a nuclear plant goes under meltdown, a large area will be affected for years Chernobyl - nuclear fallout all across Europe Fukushima - nuclear fallout across Pacific Ocean Nuclear Waste causes genetic mutations, including cancer.

Abuse of Technology: Atomic Bombs

The Future Organizations like the International Atomic Energy Agency regulate the use of atomic power According the Department of Energy, nuclear energy market projected to grow at 20% Countries like North Korea and Iran keep on developing nuclear bombs

Is Nuclear Energy the solution? Global warming is a problem - and from the information above, we can clearly see that there are risks and benefits to nuclear energy. The answer isn’t clear yet - we have to wait for further advancements in technology.