Recent Progress in Gd-Containing Materials for Neutron Shielding Applications: A Review

Area of Science:

• Nuclear Engineering
• Materials Science

Background:

• Nuclear energy demand necessitates safe storage and transport of radioactive by-products.
• Neutron radiation poses significant risks due to its high penetration and potential for irradiation damage.
• Effective neutron shielding materials are crucial for human and environmental safety.

Purpose of the Study:

• To provide a comprehensive review of gadolinium-containing neutron shielding materials.
• To analyze the design, processing, microstructure, mechanical properties, and shielding performance of these materials.
• To identify current challenges and future research directions in neutron shielding technology.

Main Methods:

• Review of existing literature on gadolinium-based neutron shielding materials.
• Categorization of materials into inorganic nonmetallic-based, polymer-based, and metallic-based.
• Analysis of material properties including microstructure and mechanical characteristics.
• Evaluation of neutron shielding performance.

Main Results:

• Gadolinium (Gd) exhibits the largest thermal neutron capture cross-section, making it an excellent neutron absorber.
• Numerous Gd-containing shielding materials have been developed in the last two decades.
• These materials are categorized and their properties and performance are reviewed.

Conclusions:

• Gd-containing materials are vital for advanced neutron shielding applications.
• Further research is needed to address current challenges in development and application.
• Potential research directions include optimizing material design and performance for enhanced radiation protection.