NUCLEAR ENERGY

Fission: History and Overview• Discovered 1938 Otto Hahn and

Frittz Strassmann

• Presented 1939 Lise Meitner Otto Frisch

• Research of Nuclear Fission began U.S. Weapons Program

• 1942 First Controlled self sustaining fission reaction, Enrico Fermi

• Nuclear Fission Creates electricity

• Three types of nuclear energy, Fission reactions, Fusion reactions, andRadioactive decay

World nuclear plants

US nuclear plants

% NUCLEAR

PoweredElectricity

LIGHT WATER REACTORS=80%

WORLD REACTOR TYPES

The ReactionType Fuel Moderator Coolant Number in use

PWR Enriched Uranium Water Water 252

BWR Enriched Uranium Water Water 93

CANDU Natural Uranium Heavy Water Heavy Water 33

GCR (inc Magnox) Natural Uranium Graphite CO2 21

AGR Enriched Uranium Graphite CO2 14

LWGR(inc RBMK) Enriched Uranium Graphite Water 15

Fission Today• 435 Nuclear Power plants worldwide

• 1/6 of the worlds power is nuclear

• France 76%, • Belgium 56%, • South Korea 36%, • Switzerland 40%, • Sweden 47%, • Finland 30%, • Japan 33%, • United Kingdom 25%, • Bulgaria 46%, • Hungry 42%, • United States 20%

• WEC energy consumption doubled by 2050

• Produces small amount of spent fuel

• 6yrs of operation, 4-meter cube

LWRs-BWR (40%US)

LWRs-PWR (60%US)

Comparison of Subsidies

Future of nuclear Energy

Fusion: Overview and History• British Physicists in the 1940s and 50s housed in a hangar at Harwell a device called ZETA - Zero Energy Toroidal Assembly

which was the first fusion based operating system.

• Masked in the secrecy of the Cold War• Fusion is the production of a thermonuclear reaction in a gas discharge

Called 'fusion' because it is based on fusing light nuclei such as hydrogen isotopes to release energy, similar to that which powers the sun and other stars.

The Process• Nuclei of two isotopes of hydrogen, deuterium (D) and tritium (T) react to

produce a helium (He) nucleus and a neutron (n). In each reaction, 17.6 MeV of energy (2.8 pJ) is liberated:

• D   +   T     4He (3.5 MeV)   +   n (14.1 MeV)

Fast Facts

• A vast, new source of energy.

• Fuels are plentiful.

• Inherently safe since any malfunction results in a rapid shutdown.

• No atmospheric pollution leading to acid rain or "greenhouse" effect.

• Radioactivity of the reactor structure, caused by the neutrons, decays rapidly and can be minimized by careful selection of low-activation materials. Provision for geological time-span disposal is not needed.

• Sunlight is energy released from fusion reactions in the sun.

• Complete fusion reactions produce no long-life products

• The fusion bomb, developed and first exploded in the early 1950's, was the first use of nuclear fusion.

The Future is Fusion

The Sun is our Greatest source of energy…the sun uses fusion

The source of fusion is vastly abundant in our oceans (an isotope of hydrogen in water)

The waste of fusion is helium, and there is no pollution of long term extent.

The price of fusion is estimated to be equivalent to that of fossil fuels

Fusion can give us energy for millions of years

Nuclear Waste

• - Two types of nuclear waste• o       Low level• o       High level

• Two types of high level wastes+ Spent+ Waste materials

-         Storage Methods+ Pools+ Above ground storage casts

  -    Transportation of Spent nuclear Fuel

+ Shipped throughout the US to storage facilities

Fission Versus Fusion

• European Safety and Environmental Assessment of Fusion Power (SEAFP) team in 1992. The main participants in SEAFP were the NET (Next Experimental Torus) team, the UKAEA , established Fusion as a “very clean and environmentally friendly source of energy for the future with very good inherent safety qualities; there are no chain reactions and no production of 'actinides‘.”

• The only waste products are helium, and toxic waste that is contained within the chamber and is not long-term.

• Fusion produces no climate-changing or atmosphere-polluting emissions.

• With Fission, relatively low environmental issues when costs are paid to maintain an environmentally friendly work area, however these costs are so high that it would be a problem in second and third world countries. There is also the problem in the case of a malfunction, worst case scenario can be very severe as opposed to the shut down process of fusion.