放射性惰性气体 37Ar的监测是全面禁止核试验条约核查体系中现场视察(OSI)的一项重要技术手段. 为在理论上考察地下核爆炸后 37Ar泄漏到地表的时间及泄漏量,将核试验场区抽象为多孔介质,在不考虑 37Ar在基岩中吸附、解吸的情况下,利用多孔介质渗流模型,对理想场区地下核爆炸产生的 37Ar在地层中的输运进行数值模拟,给出了 37Ar泄漏到地表时间及变化量. 计算结果可为OSI惰性气体监测技术的发展及其在地下核爆炸监测中应用的有效性评价提供参考.
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