A radiation shielding sensitivity analysis based on metal hydrides multilayers
Boravy Muth1, Woo Sik Jung1, Jeong Kwon Kwak2
1Department of nuclear engineering, Sejong University, Seoul 143-747 Republic of Korea.
Summary
Multilayer shielding using metal hydrides and heavy metals effectively reduces neutron and gamma rays. Combinations like ZrH2/W and TiH2/W show promise for nuclear facilities.
Area of Science:
- Nuclear Engineering
- Materials Science
- Radiation Shielding
Background:
- Efficient shielding of neutron and gamma rays is critical for nuclear facilities.
- Metal hydrides and heavy metals possess distinct properties beneficial for radiation attenuation.
Purpose of the Study:
- To design and analyze a multilayer shielding model using metal hydrides and heavy metals.
- To evaluate shielding performance against neutron and gamma radiation using Monte Carlo simulations.
- To assess radiation resistance and material lifetime through displacement per atom (DPA) analysis.
Main Methods:
- Monte Carlo simulations using the MCNP code.
- Analysis of various parameters including spectrum change, shield thickness, and number of multilayers.
- Evaluation of DPA rates for lifetime and radiation resistance estimation.
Main Results:
- ZrH2 and Tungsten (W) composites demonstrate superior gamma-ray shielding.
- TiH2 and Tungsten (W) composites are effective for neutron shielding.
- Multilayer combinations of TiH2 and ZrH2 with W offer effective shielding against both neutron and gamma rays.
Conclusions:
- Multilayer metal hydride and heavy metal composites present a viable solution for comprehensive radiation shielding.
- Optimized combinations like TiH2/ZrH2/W are suitable for diverse nuclear applications, including reactors.
- The study provides valuable insights for designing next-generation radiation shielding materials.
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