A Novel Eye Thermoluminescent Dosimeter for Measuring the Eye Lens Dose Equivalents Hₚ(3)ₙ and Hₚ(3)ᵧ in Neutron-Gamma Mixed Fields and the Simulation of Its Dosimetric Characteristics Using the GEANT4 Software

Abstract

Based on ICRP 118 (2012) recommendations, CNSC proposed an amendment to the RP Regulations to reduce the dose limit for the lens of the eye of a nuclear energy worker from the current limit of 150 mSv to 50 mSv in a one-year dosimetry period and to add an eye lens dose equivalent H_p(3) of 100 mSv in a five-year dosimetry period. This presentation describes the design of a novel Eye Thermoluminescent Dosimeter (Eye-n-TLD) to measure the eye lens dose equivalents H_p(3)_n and H_p(3)_γ, during the eye exposure to mixed fields of neutron-gamma ionizing radiations. The simulation of the Eye-n-TLD principal dosimetric characteristics using the GEANT4 Monte Carlo simulation software is also presented. The GEANT4 simulation results are benchmarked against those from simulations and/or experiments reported in the scientific literature.