Nuclear Physics

Md. Atiqur Rahman Ahad

Issues to study???• Green energy? • Why nuc in BD?• Only energy?• What are the risky areas?• Hiroshima-Nagasaki?• Russia’s Ch.? • JP’s Fukushima?• Man-made disaster vs. Natural disaster? • In BD – do we have experts?• Nuc. Vs. Terrorism?

Nuclear Engineering

• Nuclear Engineering is an endeavor that– makes use of radiation and radioactive material

for the benefit of mankind.

• Like their counterparts in chemical engineering, nuclear engineers endeavor – to improve the quality of life by manipulating basic

building blocks of matter.

Chem. vs. Nuc.

• Unlike chemical engineers, nuclear engineers works with reactions that produce millions of times more energy per reaction than any other known material.

Nuclear Energy

• It is free from the problems of fossil fuels: greenhouse gas emissions.

• A typical 1000 MW coal-burning plant emits yearly: 1,00,000 tons of SO2

75,000 tons of NOx

5,000 tons of fly ash

• USA generates 20% of the electricity; it avoided in 1999 the emission of 150 million tonnes of CO2

On the contrary, there is still the association of nuclear power with the tremendous destructive force.

Use of Nuc Energy

• Energy generation (electricity, heating)• Propulsion of naval vessels• Nuclear-powered spacecraft• Production of radioisotopes• Bomb! • Medicine• Agriculture

Some nuclear reactors

Little boy at Hiroshima

• 120 inches (300 cm) in length, 28 inches (71 cm) in diameter and weighed approximately 9,700 pounds (4,400 kg)

Fat man

Power Plant: Heat Steam Generator Electricity

• Power plants use heat supplied by a fuel to boil water and make steam, which drives a generator to make electricity.

• A generating plant's fuel: – coal, gas, oil, uranium, solar thermal

• Fuel heats water & turns it into steam. • The pressure of the steam spins the blades of a giant

rotating metal fan called a turbine. • That turbine turns the shaft of a huge generator. • Inside the generator, coils of wire and magnetic fields

interact - and electricity is produced.