Fig. 2.

The DRR for nonhuman primates exposed to reactor-derived mixed gamma/neutron radiation and nuclear weapon-derived mixed gamma/neutron radiation. The dose response relationships (DRR) are shown for five primary studies of total-body irradiation (TBI, bilateral, unilateral) of rhesus macaques (MacVittie et al. 2015b). AFRRI TRIGA reactor-derived studies, n = 3 studies, (n = 191 total) with a.) mixed γ/n radiation delivered at steady state (20 rad min⁻¹, n = 80) and b.) two combined studies that used pulse-mode exposure (< 50 msec) and performed sequentially at the same site and TRIGA reactor (n = 111), anterior to posterior exposure (Stanley et al. 1966; Wise and Turbyfill 1968). The DRR for two primary studies of mixed gamma/neutron TBI of rhesus macaques exposed at a “prompt” dose rate from two nuclear weapon detonations, “Operation Plumbbob”. Two detonations were conducted, the “Wilson shot” and the “Fiseau shot” at the nuclear test site (n = 160 total animals). The DRR is dose (rem, rads) vs mortality.