Fission and Fusion Fission is the splitting of
- Slides: 17
Fission and Fusion
Fission is the splitting of a heavy atom into Two or more lighter nuclei Fusion is combining two small nuclei to make a heavier nucleus
Fission and Fusion break the Law of Conservation of Mass!!! The law says mass (matter) can not be created or destroyed. However, in these nuclear reactions, a bit of mass IS destroyed, and converted into….
LOTS OF ENERGY!
How much energy? Einstein says…. .
Einstein’s equation
Energy = mass x (speed of light) Very big = Very small X 2 very big
• In fusion and fission, small amounts of mass are converted into huge amounts of energy • Compared to a gram of natural gas (methane), a gram of material converted to energy in a nuclear reaction gives off one BILLION times more energy
Fission Reactions Neutron + U-235 A neutron is fired at U-235 and is captured, forming unstable U-236, which then splits up
Fission Reactions 1 0 n + 235 92 U 142 56 Ba + 91 36 Kr + 3 1 0 n + energy A neutron bombards a U-235 and it splits into Ba-142, Kr-91 three neutrons and ENERGY The three neutrons can then go on to start other fission reactions
This can be the start of a chain reaction
Nuclear power plants use fission to create energy to make electricity Three Mile Island
Nuclear Reactors FUEL CONTROL • • Control Rods (MODERATORS) absorb neutrons • Control rods made of Cadmium (Cd), Graphite (C), Boron (B) • COOLANT = Liquid Sodium Na (l) or Heavy Water • Steel and High Density concrete shield personnel Must be FISSIONABLE Controlled chain reactions U-233 U-235 Pu-239 Radioactive Waste can be solid, liquid or gas
Nuclear Reactor
Nuclear accidents can happen when the chain reaction goes out of control
Thanks to FUSION, we have sunlight! Hydrogen fuses with Hydrogen to make Helium + energy in stars, like our own sun
Fusion is not as dangerous as fission Unfortunately …… it can not yet be used in power plants because too much energy is needed to overcome the repulsion of the two positively charged nuclei to be cost effective
- Fusion or fission
- Natural vs artificial radioactivity
- Fussion vs fission
- Nuclear fission and fusion similarities
- Nuclear fission and fusion similarities
- Fusion vs fission
- How is mass number calculated
- Nuclear fission and fusion webquest answer key
- Are nuclear power plants fission or fusion
- Fission vs fusion
- Fission vs fusion nuclear
- Rds 37 bomb
- Fission vs fusion
- Fusion or fission
- Splitting borderline
- Trauma bonding definition
- Teori medan ligan
- Fixed split s2 causes