Evaluation of Irradiation Displacement Damage and Radioactivity of High Entropy Alloys under Typical Neutron Energy Spectrum

Yin Xianpeng; Chen Da

doi:10.13832/j.jnpe.2024.09.0010

Volume 46 Issue 5

Oct. 2025

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Yin Xianpeng, Chen Da. Evaluation of Irradiation Displacement Damage and Radioactivity of High Entropy Alloys under Typical Neutron Energy Spectrum[J]. Nuclear Power Engineering, 2025, 46(5): 161-170. doi: 10.13832/j.jnpe.2024.09.0010

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Yin Xianpeng, Chen Da. Evaluation of Irradiation Displacement Damage and Radioactivity of High Entropy Alloys under Typical Neutron Energy Spectrum[J]. Nuclear Power Engineering, 2025, 46(5): 161-170. doi: 10.13832/j.jnpe.2024.09.0010

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Evaluation of Irradiation Displacement Damage and Radioactivity of High Entropy Alloys under Typical Neutron Energy Spectrum

doi: 10.13832/j.jnpe.2024.09.0010

Yin Xianpeng,
Chen Da^,

School of Energy and Environment, Southeast University, Nanjing, 210018, China

Received Date: 2024-09-29
Accepted Date: 2025-01-06
Rev Recd Date: 2025-01-02

Available Online: 2025-10-15

Publish Date: 2025-10-15

Abstract

Abstract

The structural materials in nuclear reactors are subjected to neutron irradiation, which leads to lattice displacement damage and neutron activation. These two neutron irradiation effects are correlated with the material's elemental composition, neutron fluence, and irradiation energy spectrum. This study focuses on high-entropy alloys, employing Monte Carlo neutronics calculation methods to evaluate radioactivity levels, equivalent dose rates, displacement damage, and helium production in three typical reactor spectra (pressurized water reactor, fast reactor, and fusion reactor). The results demonstrate that compared with 15-15Ti austenitic stainless steel and Eurofer97 reduced-activation steel, both FeCoNiCr and NbZrTiV high-entropy alloys exhibit higher neutron-induced radioactivity. These alloys show greater displacement damage efficiency in fast reactor spectra but relatively lower helium production. Future research should focus on targeted optimization of elemental compositions in high-entropy alloys according to specific service environment, with particular emphasis on minimizing easily activated elements.
- Neutron irradiation,
- Displacement damage,
- Radioactivity,
- High entropy alloy,
- Neutron spectrum

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References(26)

References

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