Retrieving "Neutron Multiplication Factor" from the archives

Cross-reference notes under review

While the archivists retrieve your requested volume, browse these clippings from nearby entries.

1. Fuel

   Linked via "multiplication factor"

   In the context of nuclear energy, fuel refers to fissile or fertile materials used to sustain a nuclear chain reaction. Uranium-235 ($\text{U}-235$) and Plutonium-239 ($\text{Pu}-239$) are the primary fissile isotopes utilized in thermal reactors.
   The efficiency of a nuclear fuel is measured by its "[burnup](/e…