Hiroshima bomb

How does a nuclear power station work?

Nuclear reactor

What do the control rods do?

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Mass BeforeMass AfterMass has been turned into energyNuclear reactor

What do the control rods do?Usually made of BoronAbsorb the excess neutrons so a chain reactiondoes not happen.

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Extremely large bang

After 30 cycles, more than 68000 billion atoms have been spiltThe first atomic bombing

Nuclear disaster @ Chernobyl

Nuclear fissionExplain the stages in the diagram to the right.

1.

2.

12Uranium is used to produce heat in a nuclear reactor. This is called ___________ fission. The decay of uranium can be a chain reaction.A Nuclear bomb

Why did it happen?Finish the diagram of the large scale fission..

Hiroshima bombLittle boy-Uranium

TypeNuclear weaponPlaceoforiginUnited StatesSpecificationsWeight9,700 pounds (4,400kg)Length120 inches (3.0m)Diameter28 inches (710mm)It has been estimated that 130,000 to 150,000 persons had died by the end of December 1945.

Its design was not tested in advance, unlike the more complex plutonium bomb Fat Man. NagasakiFat man- plutonium core

TypeNuclear weaponPlaceoforiginUnited StatesSpecificationsWeight10,213 pounds (4,633kg)Length10.7 feet (3.3m)Diameter5 feet (1.5m)An estimated 39,000 people were killed outright by the bombing at Nagasaki, and a further 25,000 were injured.

Nagasaki 2 daysbefore the bomb

Nagasaki 3 daysafter the bomb

Nagasaki 11miles high

Exam style questions1.Explain how the chain reaction is controlled ina nuclear reactor2. Assuming all three neutrons go on to spilt other atoms, how many atoms would have been split in on the: 3rd cycle20th cycle15th cycle3. Use the diagram how a nuclear power station works in terms of nuclear fission and the stages that follow.

Diagram