• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Human and ecological risk assessment >Radionuclide transport model for risk evaluation of high-level radioactive waste in Northwestern China
【24h】

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

机译：西北高放射性废物风险评估的放射性核素迁移模型

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

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 (Sr-90, Cs-137, U-235 and Pu-239) are assumed to be instantaneously released at three locations with large groundwater velocities. Transport modeling shows that U-235 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.
机译：正确处理高放射性废物（HLRW）极具挑战性。数值模拟是评估放射性核素运输风险的有用方法。本文研究了中国潜在的HLRW储层的水文地质条件。首先在中国西北部的一个地点使用TOUGH2-MP / EOS7R模块构建了区域放射性核素迁移模型，以评估放射性核素的迁移行为。稳态下的流模型校准表明，模拟和观察到的液压头匹配良好。假设放射性核素（Sr-90，Cs-137，U-235和Pu-239）在地下水流速较大的三个位置瞬时释放。运输模型表明，U-235是最敏感的元素，并且在10,000年后具有羽状大小（2400 m）。进行了包括渗透率，分布系数和扩散系数在内的参数敏感性分析。结果表明，分配系数是核素转运的最关键参数。这些发现将为预期的高放废物处置场中放射性核素迁移过程提供初步参考，这对于安全性分析以及在储存库系统内和周围的进一步运输提供信息。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号