The key component in the so-called EPRI effective dose equivalent (EDE) methodology is
an algorithm that utilizes two dosimeters (instead of multiple dosimeters) to predict the EDE
for external photon exposures. The exposure scenarios that were previously studied in
deriving the algorithm include parallel photon beams and point sources 33 cm from the body
surface. The motivation for this study was the need to investigate source locations within 33
cm from the body so the method is more widely applicable. The ORNL stylized mathematical …