- #1
Naimbora
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The compositions of nuclear reactors are often stated in volume fractions. i.e the fractions of the volume of some region that are composed of particular materials. Show that the macroscopic cross section for the equivalent homogeneous mixture of materials is given by
∑a = f1 ∑a1 + f2∑a2 + …..
where fi and ∑ai are respectively the volume fraction and macroscopic absorption cross section of the ith constituent at its normal density.
∑a = f1 ∑a1 + f2∑a2 + …..
where fi and ∑ai are respectively the volume fraction and macroscopic absorption cross section of the ith constituent at its normal density.