Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    0
    ReputationRep:
    Currently doing past papers for edexcel igcse physics and they keep asking about some stage in the nuclear fission process.

    eg.
    how does nuclear fission lead to a chain reaction
    what are the products
    what is the process etc etc

    However I keep getting it wrong and the MS is sort of confusing. Could some explain the WHOLE process? Thank you v much


    ps. can someone also give me a rundown of the Geiger and Marsden stuff? I really have no idea what any of it means thnks v v v much
    Offline

    11
    ReputationRep:
    So basically, you get a Uranium-235* nucleus, then you shoot a neutron at it. The nucleus splits into two? smaller nuclei, and neutrons are released. These neutrons go on to split other Uranium-235* nuclei, which creates two smaller nuclei and releases neutrons, and so on. This is known as a chain reaction, as splitting one nucleus results in more nuclei being split and so on. To stop or slow down this chain reaction, you stick a few control rods in between the fuel rods. These absorb the neutrons so they cannot split more nuclei.

    *Uranium-235 is an isotope of Uranium and is used as the fuel in a nuclear fission reaction. Other nuclear fuels are available for your reacting pleasure, such as Plutonium and Thorium.

    Energy is released when the nuclei splits. This is nuclear energy? which is then transferred to thermal energy. Thermal energy heats up coolant which is piped past reaction chamber, coolant passes heat exchanger, which uses the thermal energy to heat water, evaporating it into steam. This steam is used to drive turbines, thus converting thermal energy to kinetic energy. The turbine is used to drive a motor, which generates electricity. (But that's a whole other topic, from Core)
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Brussels sprouts
    Useful resources

    Study tools

    Rosette

    Essay expert

    Learn to write like a pro with our ultimate essay guide.

    Thinking about uni already?

    Thinking about uni already?

    See where you can apply with our uni match tool

    Student chat

    Ask a question

    Chat to other GCSE students and get your study questions answered.

    Creating

    Make study resources

    Create all the resources you need to get the grades.

    Planner

    Create your own Study Plan

    Organise all your homework and exams so you never miss another deadline.

    Resources by subject

    From flashcards to mind maps; there's everything you need for all of your GCSE subjects.

    Papers

    Find past papers

    100s of GCSE past papers for all your subjects at your fingertips.

    Help out other students

    Can you help? Study help unanswered threads

    Groups associated with this forum:

    View associated groups
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.