Design, Modeling, and Construction of a Shielding Chamber for the X-Ray Generator in an Industrial Tomography System

Articles in Press

Document Type : Computer Article

Authors

1 Radiation Application Research School, Nuclear Science and Technology Research Institute, AEOI, P.O.Box: 11365-3486, Tehran - Iran

2 Radiation Application Research Nuclear Science and Technology Research School Institute. ΑΕΟΙ. P.O.Box: 11365- 3486. Tehran Iran

Abstract

Industrial X-ray computed tomography (CT) systems have become indispensable in non-destructive testing, quality control, and material characterization. The high-energy ionizing radiation emitted by their X ray generators require robust shielding solutions to protect operators and the surrounding environment while complying with international safety standards, such as NCRP guidelines. This study presents the design, Monte Carlo modeling, construction, and performance evaluation of a custom shielding chamber developed for an industrial CT X ray generator. Using the MCNPX 2.7.0 simulation code, the radiation field around the generator was modeled under realistic operating conditions to optimize the shielding geometry and material configuration. The designed chamber, fabricated from 4 mm thick stainless steel with an additional 5 cm lead block positioned in the beam’s forward direction, was constructed in the laboratory and experimentally validated. Comparisons between simulated and measured dose rates at multiple locations around the chamber (measured using a calibrated GRAETZ DoseDG dosimeter) showed excellent agreement, with all measurements remaining below the regulatory limit of 10 µSv/h in controlled areas. The validated model can serve as a predictive tool for designing shielding enclosures for a wide range of photon energies and generator configurations, reducing prototyping time and ensuring compliance with occupational radiation protection standards.

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Main Subjects

Journal of Modeling in Engineering

Articles in Press, Accepted Manuscript
Available Online from 06 December 2025

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History

  • Receive Date: 17 February 2025
  • Revise Date: 15 November 2025
  • Accept Date: 06 December 2025

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