Spectrum and Yield to Dose Conversion Coefficients for Beta Skin Doses Linked to the Q System

Abstract

Monte Carlo simulations are a state-of-the-art method to calculate dose coefficients and could be used with the Q system for radioactive material packaging. These simulations often take a long time to converge with sufficient precision. Furthermore, if multiple sources have to be taken into account, many weeks of calculations may be needed. In order to reduce the calculation time, this paper proposes a new method based on a transfer function to instantly compute Q values associated with beta skin doses. The method developed in this paper can be applied to compute beta skin dose and easily could be extended to other particles and different depths in organs with various kinds of shielding configurations between source and target.

Computation of Radioactive Material Transport Limits Within A1/A2 Working Group at IAEA TRANSSC

“…This model has been developed in coherence with the current IAEA SSG-26 publication. The values and calculation methods are fully described in [2]. The Table 2 below summarizes the characteristics and assumptions of this model.…”

“…The calculation methods are described in [2] regarding the current regulation limits and in paragraph IV of this document for the on-going work regarding the regulation update. The software will be modified during all the development process of the new models at IAEA, to include the latest decisions.…”

“…The mixture module allows for computing transport limits for a mixture of radionuclides, according IAEA SSR-6 [2] §405. The user selects the number of radionuclides to add to the package on the right side of the table.…”

“…CERN previously computed values of the Q-System using the current definition from IAEA SSG-26, and proposed the determination of Q-Values for shipping by the use of transfer functions [2]. The transfer functions are built from data initially calculated with FLUKA Monte-Carlo simulations [3], [4].…”

Calculation and benchmark of fluence-to-local skin equivalent dose coefficients for neutrons with FLUKA, MCNP, and GEANT4 Monte-Carlo codes

“…The LSD-CC values are of high importance for radiation protection purposes and, as an example, for the IAEA working group A1/A2 whose objective is to propose updated limits of the international regulations for the safe transport of radioactive material (Frosio et al 2019(Frosio et al , 2020. The IAEA A1/A2 working group defines the Q B quantity based on the local skin equivalent dose (IAEASSG26 2012).…”