Np(IV),Pu(IV),Am(III)在北山花岗岩 裂隙水中存在形式的模拟研究 |
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引用本文: | 周 佳,王 驹,苏 锐.Np(IV),Pu(IV),Am(III)在北山花岗岩 裂隙水中存在形式的模拟研究[J].岩石力学与工程学报,2007,26(Z2):3982-3982. |
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作者姓名: | 周 佳 王 驹 苏 锐 |
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摘 要: | 以高放废物中的关键核素Np(IV),Pu(IV),Am(III)为例,应用地球化学软件包EQ3/6的EQ3NR程序,模拟计算Np(IV),Pu(IV),Am(III)在花岗岩裂隙水中存在形式,从而为研究Np,Pu,Am的水文地球化学行为提供基础依据。根据计算结果, NpO2+,Pu(OH)5-,AmCO3+,Am3+,Am(OH)2+为这3种锕系元素在北山3#井440 m深花岗岩裂隙水中的主要存在形式。对由于人为因素可能引起的地下水中的pH值变化以及Cl-,SO42-,F-,HCO3-离子浓度变化对Np(IV),Pu(IV),Am(III)存在形式的影响进行研究。研究结果表明,pH值是影响Np(IV),Pu(IV),Am(III)在花岗岩裂隙水中的主要存在形式的因素,而Cl-,SO42-,F-,HCO3-离子浓度变化的影响次之。
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关 键 词: | 水文地质存在形式锕系元素地球化学模型 |
收稿时间: | 2007-03-07; |
MODELING STUDY ON SPECIATION OF NUCLIDE ELEMENTS IN UNDERGROUND WATER FROM GRANITE FRACTURES |
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Abstract: | The knowledge of speciation is the key contents of performing safety assessment studies for high-level radioactive waste repositories. As the main elements of high-level radioactive waste,three radionuclides,Np(IV),Pu(IV),Am(III),are calculated by using EQ3NR of geochemical model EQ3/6. The main speciation of the three radionuclides,Np(IV),Pu(IV),Am(III),are NpO2+,Pu(OH)5-,AmCO3+,Am3+,Am(OH)2+in the underground water. This paper also studies the speciation of the three nuclide elements,i.e. Np(IV),Pu(IV),Am(III),under different conditions such as various pH values,the concentrations of Cl-,F-,SO42-and HCO3-. The study illustrates that increase or decrease of pH values will affect the variety of the speciations of Np(IV),Pu(IV),Am(III),and the concentrations of Cl-,F-,SO42-and HCO3-have the less impact on the speciations of Np(IV),Pu(IV),Am(III). |
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Keywords: | hydrology geology speciation radionuclides geochemical modeling |
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