Nuclear Power Engineering
Commercial power generation from fusion reactor is not yet possible, because

Quantity of fuel required for initiating fusion reaction is prohibitively high
It is difficult to control fusion reaction
The fuel required (e.g. deuterium and tritium) is scarce
It is difficult to initiate fusion reaction

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Nuclear Power Engineering
Nuclear fuel generally used in reactors is uranium oxide instead of uranium, because the former has higher

Resistance to effects of irradiation
Density ; hence core volume for a given power output would be smaller
Melting point, hence can be subjected to higher temperature
All of these

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