Select from below the two statements that are false.

Question $17$Answer

The enrichment process, which is most commonly achieved by diffusion or centrifuge methods, is used to increase the proportion of U$-235$ in uranium fuel

The most common form of nuclear fuel in use in power stations today comprises bundles of fuel rods containing compressed pellets of enriched uranium dioxide

Methods for extracting uranium from the ground include; open cast mining, underground mining and in$-$situ leaching.

Depleted uranium or DU is the name given to uranium after it has spent some time in the reactor core and some of the U$-235$ has been consumed

One of the current technological issues related to nuclear fuel is the development of suitable casing materials that can withstand the demanding conditions of high temperature and neutron bombardment

Due to the much higher proportion of U$-235$ required for uranium which is to be used in nuclear weapons, the enrichment methods employed are entirely different to those that are used for manufacturing fuel for power generation purposes