The test facility was the Fast Neutron Irradiation (FNI) Facility of University of Massachusetts Lowell Research Reactor. The neutron fluence for this irradiation was measured using ASTM E-265 Measuring Reaction Rates and Fast Neutron Fluence by Radioactivation of Sulfur-32 and correlated to the measured reactor power level. All irradiation conditions required under ASTM 722 were met. This includes neutron fluence, distribution and uncertainty. The Average Integrated Neutron Fluence, 1-MeV(Si) equivalent, reflects these factors.

Detailed information of the radiation facility is available here.