Radiation effects in phosphate-based matrices for back-end nuclear applications

IF 1.9 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Bulletin of Materials Science Pub Date : 2024-08-21 DOI:10.1007/s12034-024-03281-6

RUMU H BANERJEE, NISHANT CHAUDHARY, NAINA RAJE, PRANESH SENGUPTA

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Abstract

MgKPO₄·6H₂O (magnesium potassium phosphate-based cement; MKP) is an environment friendly alternative to Portland cement with potential applications in environmental remediation and radioactive nuclear waste management, particularly in the context of β-emitting Cs and Sr immobilizations. Thus, investigation of the radiation effects and temperature due to decay heat in such material is of prime importance. In this study, MgKPO₄·6H₂O powders were synthesized and subsequently annealed at 1273 K for 2 h under ambient atmosphere to form MgKPO₄. The synthesized and annealed MKP specimens were irradiated under ambient conditions with 10-MeV electron beam up to imparted doses of 20 MGy. XRD results reveal the formation of amorphous fraction in irradiated MgKPO₄·6H₂O, while the annealed MKP specimens exhibit good radiation stability without amorphization. The annealed specimens also indicated good thermal stability when compared to as-prepared MgKPO₄·6H₂O specimen both in pristine and irradiated conditions. Vibrational spectroscopic results confirm that the radiation effect resulted in distortion/removal of structural water and formation of radiolysis products in MgKPO₄·6H₂O.

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用于后端核应用的磷酸盐基质中的辐射效应

MgKPO4-6H2O （磷酸二氢钾镁基水泥；MKP）是波特兰水泥的一种环境友好型替代品，具有环境修复和放射性核废料管理方面的潜在应用，特别是在β发射铯和锶固定方面。因此，研究此类材料的辐射效应和衰变热引起的温度至关重要。本研究合成了 MgKPO4-6H2O 粉末，随后在环境气氛下于 1273 K 退火 2 小时，形成 MgKPO4。合成和退火后的 MKP 试样在环境条件下接受 10-MeV 电子束辐照，最高辐照剂量为 20 MGy。XRD 结果表明，辐照后的 MgKPO4-6H2O 中形成了无定形部分，而退火后的 MKP 试样则表现出良好的辐射稳定性，没有发生非晶化。与制备的 MgKPO4-6H2O 试样相比，退火试样在原始和辐照条件下都具有良好的热稳定性。振动光谱结果证实，辐照效应导致了 MgKPO4-6H2O 中结构水的变形/去除和辐射分解产物的形成。

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来源期刊

Bulletin of Materials Science 工程技术-材料科学：综合

CiteScore

3.40

自引率

5.60%

发文量

209

审稿时长

11.5 months

期刊介绍： The Bulletin of Materials Science is a bi-monthly journal being published by the Indian Academy of Sciences in collaboration with the Materials Research Society of India and the Indian National Science Academy. The journal publishes original research articles, review articles and rapid communications in all areas of materials science. The journal also publishes from time to time important Conference Symposia/ Proceedings which are of interest to materials scientists. It has an International Advisory Editorial Board and an Editorial Committee. The Bulletin accords high importance to the quality of articles published and to keep at a minimum the processing time of papers submitted for publication.