Rule 16.
* If it is more convenient to measure the neutron flux, or equivalent, than to determine the neutron absorbed dose in rads, 1 rem of neutron radiation may, for purposes of these regulations, be assumed to be equivalent to 14 million neutrons per square centimeter incident upon the body; or, if there exists sufficient information to estimate with reasonable accuracy the approximate distribution in energy of the neutrons, the incident number of neutrons per square centimeter equivalent to 1 rem may be estimated from the following table:
Neutron Flux Dose Equivalents
Neutron Energy (MeV) | Number of neutrons per square centimeter for a dose equivalent of 1 rem (neutrons/cm2) | Average flux to deliver 100 millirem in 40 hours (neutrons/cm2 per second) |
Thermal | 970 x 106 | 670 |
0.0001 | 720 x 106 | 500 |
0.005 | 820 x 106 | 570 |
0.02 | 400 x 106 | 280 |
0.1 | 120 x 106 | 80 |
0.5 | 43 x 106 | 30 |
1.0 | 26 x 106 | 18 |
2.5 | 29 x 106 | 20 |
5.0 | 26 x 106 | 18 |
7.5 | 24 x 106 | 17 |
10 | 24 x 106 | 17 |
10 to 30 | 14 x 106 | 10 |
Mich. Admin. Code R. 325.5016