Breeder reactor is used to convert 92U238 into:

A breeder reactor is used to convert Uranium-238 (92U238) into Plutonium-239 (94Pu239). Here are the steps of this conversion:

1. The process begins when a neutron is absorbed by a Uranium-238 nucleus, converting it into Uranium-239 (92U239).

2. Uranium-239 is unstable and undergoes beta decay, where a neutron is converted into a proton, an electron, and an electron antineutrino. This transforms the Uranium-239 into Neptunium-239 (93Np239).

3. Neptunium-239 is also unstable and undergoes another beta decay, again converting a neutron into a proton. This results in the creation of Plutonium-239 (94Pu239).

So, a breeder reactor is used to convert Uranium-238 into Plutonium-239 through a series of neutron absorptions and beta decays.