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==Key Stage 4==
===Meaning===
A '''fuel rod''' is a [[cylinder|cylindrical]] [[object]] containing a [[Nuclear Fission|fissionable]] [[isotope]] for use in [[Nuclear Reactor|nuclear reactors]].
===About Fuel Rods===
: [[Fuel Rod]]s usually contain around 20% [[Uranium-235]] which can undergo [[Nuclear Fission|nuclear fission]] following the capture of a [[neutron]] to become [[Uranium-236]].
{| class="wikitable"
|-
|[[File:NuclearReactor.png|center|300px]]
| style="height:20px; width:300px; text-align:left;" |In '''[[Nuclear Fission Reactor|nuclear fission reactors''' ]] [[Unstable Isotope|unstable isotope]]s are in [[Fuel Rod|fuel rods]]
The [[Fuel Rod|fuel rods]] in a '''nuclear reactor''' are slim to allow [[neutron]]s to escape the [[Fuel Rod|fuel rods]] easily. This prevents a single [[Fuel Rod|fuel rod]] from sustaining a [[Nuclear Chain Reaction|chain reaction]].
The [[Fuel Rod|fuel rods]] are placed next to each other so that the [[neutron]]s released by one [[Fuel Rod|fuel rod]] are absorbed by another [[Fuel Rod|fuel rod]]. This also allows them to have [[Control Rod|control rods]] placed between them to stop the [[Nuclear Reaction|reaction]].
|}
===References===
====AQA====
:[https://www.amazon.co.uk/gp/product/0008158770/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=0008158770&linkCode=as2&tag=nrjc-21&linkId=ec31595e720e1529e49876c3866fff6e ''Fuel rod, page 129, GCSE Physics; Student Book, Collins, AQA '']
====Edexcel====
:[https://www.amazon.co.uk/gp/product/1292120223/ref=as_li_tl?ie=UTF8&camp=1634&creative=6738&creativeASIN=1292120223&linkCode=as2&tag=nrjc-21&linkId=068ecf40278c32406a7f1c6e66751417 ''Fuel rods, page 112, GCSE Physics, Pearson Edexcel '']