基于COMSOL的核素Sr和Cs在综合缓冲/回填材料中的迁移行为模拟

IF 1.5 3区化学 Q3 CHEMISTRY, ANALYTICAL

Journal of Radioanalytical and Nuclear Chemistry Pub Date : 2025-03-07 DOI:10.1007/s10967-025-10036-y

Duan Tian, Zhe Wang, Jiaqian Zhang, Ying Luo, Zhenlong Zhang, Chao Li, Kai Ye, Chaoliang Peng, Yiming Chen, Wenxue Lin, Jingyan Zhang

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引用次数: 0

摘要

本研究通过土柱实验和COMSOL模型研究了凹凸棒土-膨润土-黄铁矿（AB7Fe）和沸石-膨润土-黄铁矿（ZB7Fe）混合物作为缓冲和回填材料的核素迁移。结果表明，与AB7Fe相比，ZB7Fe对铯（Cs）和锶（Sr）具有更高的吸附能力。相反，AB7Fe表现出优越的延迟性能，更有效地减缓核素迁移。1000年后，AB7Fe中的Cs和Sr浓度超过了ZB7Fe。此外，核素迁移随着起爆压力、扩散系数和扩散系数的增加而增加。这项研究对于提高核废料储存库的长期安全性至关重要。

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Simulation of the migration behavior of nuclides Sr and Cs in integrated buffer/backfill materials based on COMSOL

This study examines attapulgite-bentonite-pyrite (AB₇Fe) and zeolite-bentonite-pyrite (ZB₇Fe) mixtures as buffer and backfill materials for nuclide migration using soil column experiments and COMSOL modeling. The results indicated that ZB₇Fe possessed higher adsorption capacities for cesium (Cs) and strontium (Sr) compared to AB₇Fe. Conversely, AB₇Fe demonstrated superior retardation performance, more effectively slowing nuclide migration. After 1000 years, Cs and Sr concentrations in AB₇Fe surpassed those in ZB₇Fe. Additionally, nuclide migration increased with higher initiation pressure, dispersion, and diffusion coefficients. This research is crucial for improving the long-term safety of nuclear waste repositories.

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来源期刊

Journal of Radioanalytical and Nuclear Chemistry 化学-分析化学

CiteScore

2.80

自引率

18.80%

发文量

504

审稿时长

2.2 months

期刊介绍： An international periodical publishing original papers, letters, review papers and short communications on nuclear chemistry. The subjects covered include: Nuclear chemistry, Radiochemistry, Radiation chemistry, Radiobiological chemistry, Environmental radiochemistry, Production and control of radioisotopes and labelled compounds, Nuclear power plant chemistry, Nuclear fuel chemistry, Radioanalytical chemistry, Radiation detection and measurement, Nuclear instrumentation and automation, etc.