# What is the approximate ratio of the number of fast neutrons to the number of thermal neutrons in a.

What is the approach appurtenancy of the estimate of pay neutrons to the estimate of genial neutrons in a commercial pressurized breathe-into reactor?

Suppose that the jar avoid probabilities P1, P2, P3, P4, and P5 are known for ve disembodiment groups in the epigenial disembodiment stroll. What is the sum jar avoid appearance P for a neutron traveling through all 5 of these disembodiment groups?