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Science and Technology of Nuclear Installations
Volume 2017, Article ID 6078461, 7 pages
https://doi.org/10.1155/2017/6078461
Research Article

Calculation of Lead-Iron Double-Layer Thickness for Gamma-Ray Shielding by MATLAB Program

King Mongkut’s Institute of Technology Ladkrabang, Bangkok, Thailand

Correspondence should be addressed to Kitsakorn Locharoenrat; ht.ca.ltimk@ol.nrokastik

Received 27 July 2017; Accepted 13 November 2017; Published 28 November 2017

Academic Editor: Arkady Serikov

Copyright © 2017 Sarai Lekchaum and Kitsakorn Locharoenrat. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

This contribution is aimed at designing the optimal thickness of lead-iron double-layer container to store a radioactive waste releasing the photon energy at 1.3325 MeV and initial radiation intensity at 100 mSv/hr using the optimization design by MATLAB software. This design consisted of three parts of calculations to achieve 1000 times the radiation attenuation of container. The first was the logarithmic interpolation for the mass attenuation coefficient. The second was the bilogarithmic interpolation for the exposure buildup factor. The third was the contour-plotting analytical technique for the optimal thickness of radiation container. The values of mass attenuation coefficient and exposure buildup factor were exactly validated as compared with the standard reference database. Furthermore, we have found that the optimal thickness was 3.2 cm for lead (1st layer) and 17.0 cm for iron (2nd layer). Container weight was 994.30 kg, whilst container cost was 167.30 USD. The benefit of our design can quickly and precisely apply for the radiation safety assessment of the occupational radiation workers who always work in the nuclear reactor area.