
*NE406 Radiation Protection and Shielding* *Return to Course Outline*

Homework #12:

1. Find the groupwise spontaneous fission neutron source for 1 milligram of C-252. Use the group structure used in the lesson.

2. Find the groupwise neutron source for 1 gram of an Am-241/B mixture that has 10 boron atoms per Am-241 atom.

For the multigroup structure, use:

Group number, g Upper limit of group, , MeV

1 7

2 6

3 5

4 4

5 3

6 2

7 1

Bottom of group 7 0

Hint: You can "eyeball" the spectrum group integrals using Figure 4.3, picking out the value in the center of each group and multiplying by the group width -- which is 1 for each of the groups I have given you. BE SURE TO NORMALIZE YOUR SPECTRUM (i.e., divide each group spectrum value by the sum of all of the groups).

Subject: Homework12


*Return to Course Outline* © 1998 by Ronald E. Pevey. All rights reserved.