A Monte Carlo Study on Skin Dose Contamination Coefficients of 252Cf Radionuclide

Abstract

Handling of 252Cf radionuclide source can lead to contamination of the skin surface in case of an accident. There is still an increasing demand to have dose conversion coefficients of each primary particle and different sources. On the other hand, there is no literature that presents actual values and methods for determining skin dose contamination and its coefficients for 252Cf source. Thus, this paper is concerned with quantifying the received dose rate and its coefficients in the skin as a result of a contamination scenario. The equivalent and absorbed dose rates, as well as SDCC, are estimated using MCNPX Monte-Carlo simulation’s well-established calculation code in the skin. Two methods i.e. watt fission and doppler effect are proposed for calculating particles’ spectra, and consequently, with the help of flux–to–dose conversion function Equivalent dose rates are derived. Also, the SDCC on the skin surface for different particles is obtained and these values are reported for 252Cf radionuclide. The particles of interest in this study are neutrons and gamma photons. The new dose coefficients allow the estimation of the skin dose contamination in radionuclides of interest.

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