The Percentage of ²³⁵U-- as Opposed to ²³⁸U-- Present in Light-

Multiple Choice

The percentage of ²³⁵U-- as opposed to ²³⁸U-- present in light- water uranium power reactors is closest to

A) 5 percent.
B) 90 percent.
C) 50 percent.
D) 25 percent.
E) 75 percent.