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The increasing demand for eco-friendly radiation shielding materials has prompted exploration of sustainable biopolymers reinforced with natural waste-derived fillers. This study investigates the utilization of duck eggshell waste, an abundant agricultural byproduct, as a functional additive in biopolymer films for radiation protection applications. Duck eggshells, primarily composed of calcium carbonate, were processed into fine powder and incorporated into biodegradable polymer matrices to enhance mechanical strength and attenuate ionizing radiation. The resulting biopolymer films were characterized for their structural and radiation-shielding properties using fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), ultraviolet-visible spectroscopy (UV-Vis.) and gamma-ray attenuation measurements. Results demonstrated that the inclusion of eggshell powder improved film density and radiation absorption capacity while maintaining biodegradability and flexibility. This approach not only valorizes eggshell waste but also offers a sustainable alternative to conventional synthetic shielding materials, contributing to environmentally responsible solutions in medical, industrial, and nuclear applications. The study highlights the potential of waste-derived biopolymers in advanced functional materials.