Radiation

    Cards (26)

    • What is alpha radiation

      helium nucleus
      2p 2n
    • What is beta radiation

      High energy electron from nucleus
    • What is gamma radiation
      High energy electro magnetic wave which travels at the speed of light
    • relative mass of alpha particle

      4
    • Relative mass of beta
      ~1/2000
    • Relative mass of gamma wave
      0
    • Relative charge of alpha particle 

      +2
    • Relative charge of beta 

      -1
    • Which is the most ionising, alpha beta gamma?
      alpha
    • Which has The highest penetrating power? Alpha beta gamma?

      Gamma
    • What is gamma radiations range in air?
      infinite
    • Natural sources of radiation
      Granite
      Radon gas in air
      Cosmic rays
    • Artificial sources of radiation
      Fallout from nuclear weapon testing
      Radiography department
      Nuclear waste
      Nuclear accidents
    • Units of radiation dose
      Sieverts
    • Which radiation is the most dangerous inside your body?
      alpha source
    • Which is the most dangerous radiation Outside your body?
      Beta source
    • Nuclear fission

      Large nuclei splitting
    • Nuclear fusion
      Small nuclei fusing
    • Fission process
      Low energy neutron combines with u235
      to give u236
      Fission occurs releasing daughter nuclei +3neutrons + energy
    • Fusion process
      Small nuclei fuse into larger nucleus releasing energy
      Electrostatic repulsion between nuclei makes this difficult
    • NFR

      nuclear fusion reactor
    • NFR fuel rods

      Assembled into rods, they can be insterted and removed to load and unload the reactor, each of these it used for a few months until the amount of u235 is greatly reduces
    • NFR control rods

      these are made if materials that absorb neutron such as boron if they are fully inserted the chain reaction stops , if they are moved out the reaction starts going faster and faster
    • NFR moderator

      The gaps between the fuel rods and control rods are filled with this it is usually carbon or heavy water the job of this part is tk slow down the neutrons emitted by u235 without it the neutrons will be going too fast and will escape without causing fission
    • NFR cooling unit

      This is used to remove heat , pressurised water js circulated through the reaction core, then it goes through the sealed pipes to and from a heat exchanger, the water is used to turn turbines once it has extracted the heat.
    • NFR vessel

      This is where the fission takes place