Radionuclide transport model for risk evaluation of high-level radioactive waste in Northwestern China

Radionuclide transport model for risk evaluation of high-level radioactive waste in Northwestern China
复制标题

西北地区高放废物风险评价的放射性核素输运模型

DOI:
10.1080/10807039.2017.1361811
复制
发表时间:
2017-09
影响因子:
4.3
通讯作者:
Wang Jingrui
Wang Jingrui
中科院分区:
环境科学与生态学3区
文献类型:
--
作者:
Cao Xiaoyuan;Hu Litang;Wang Jinsheng;Wang Jingrui

文献摘要

参考文献

相似文献

摘要高放射性废物(HLRW)的妥善处置是一个极具挑战性的问题。数值模拟是评估放射性核素运输风险的有用方法。本文对中国某高放废物资源库的水文地质条件进行了研究。首次利用TOUGH2MP/EOS7R模块建立了一个区域放射性核素输运模式,用于评价放射性核素在中国西北部的输运行为。稳态模型校核表明,模拟水头与实测水头吻合较好。假设放射性核素(~(90)Sr、~(137)Cs、~(235)U和~(239)Pu)在地下水流速较大的三个地点瞬间释放。输运模拟表明,235U是最敏感的元素,10000年后具有2400m的烟柱大小。对渗透率、分布系数、扩散系数等参数进行了敏感性分析。结果表明,分配系数是影响核素迁移的最关键参数。这些发现将为未来高放废物处置场的放射性核素迁移过程提供初步参考,可为安全分析和储存库系统内和周围的进一步运输提供信息。
ABSTRACT The proper disposal of high-level radioactive waste (HLRW) is highly challenging. Numerical simulations are helpful methods of evaluating the risks of radionuclide transport. This paper examines the hydrogeological conditions of a prospective HLRW repository in China. A regional radionuclide transport model is first constructed using the TOUGH2-MP/EOS7R module at a site in northwestern China to evaluate radionuclide transport behavior. A flow model calibration under a steady state shows that the simulated and observed hydraulic heads match well. Hypothetical radionuclides (90Sr, 137Cs, 235U and 239Pu) are assumed to be instantaneously released at three locations with large groundwater velocities. Transport modeling shows that 235U is the most sensitive element and has the plume size (2400 m) after 10,000 years. Sensitivity analyses of parameters, including the permeability, distribution coefficient and diffusion coefficient, are carried out. The results show that the distribution coefficient is the most critical parameter for nuclide transport. These findings will provide a preliminary reference for the radionuclide migration process at a prospective HLRW disposal site, which could be informative for safety analyses and further transport in and around the repository system.
DOI: 10.13182/nt82-a33032
发表时间: 1982-11
期刊: Nuclear Technology
影响因子: 1.5
作者:
Heinz Bachhuber-;K. Bunzl;Wolfgang Schimmack-;I. Gans
通讯作者: Heinz Bachhuber-;K. Bunzl;Wolfgang Schimmack-;I. Gans
DOI: 10.1080/10807039.2014.957945
发表时间: 2015-07
期刊: Human and Ecological Risk Assessment: An International Journal
影响因子: --
作者:
X. Zeng;Dong Wang;Jichun Wu;Xiaobin Zhu;Lachun Wang;X. Zou
通讯作者: X. Zeng;Dong Wang;Jichun Wu;Xiaobin Zhu;Lachun Wang;X. Zou
DOI: --
发表时间: 2015
期刊: --
影响因子: --
作者:
Cnnc Key
通讯作者: Cnnc Key
DOI: 10.1016/j.ijrmms.2013.09.003
发表时间: 2013-12-01
影响因子: 7.2
作者:
Zhao, X. G.;Cai, M.;Ma, L. K.
通讯作者: Ma, L. K.
DOI: --
发表时间: 2012
期刊: --
影响因子: --
作者:
Wei Hong-gang
通讯作者: Wei Hong-gang