In a BWR-type reactor, one of the fuel rods is made of highly enriched uranium. 2.5%, indicate how many atoms per cm³ this fuel rod has.
A. Calculate the number of uranium atoms based on the enrichment level and density.
B. Compare the atom density with that of natural uranium.
C. Discuss the implications of high enrichment for reactor efficiency.
D. Evaluate the safety concerns associated with using highly enriched uranium in reactors.