放射性惰性气体 37Ar向地表输运的数值模拟

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。 Monitoring radioactive gas 37Ar is an important technique for the On Site Inspection(OSI) of the Comprehensive Nuclear Test Ban Treaty (CTBT) verification regime. In order to establish a theoretical model that can be used to calculate the appearing time and radioactivity of 37Ar which transports to the ground after a nuclear explosion, the rock media in the test area is assumed to be a homogeneous porous media, without consideration of gas absorption by and release from the rock media. The seepage model in the porous media is used to calculate 37Ar transportation. Computational results give the time 37Ar leaks to the ground and the variation of its radioactivity with time．And we can analyze and consider the computational results when we have developed OSI noble gas monitoring systems and evaluated their effectiveness.

Numerical Simulation of Underground 37Ar Transportation to the Ground

Monitoring radioactive gas 37Ar is an important technique for the On-Site Inspection(OSI) of the Comprehensive Nuclear Test Ban Treaty (CTBT) verification regime.In order to establish a theoretical model that can be used to calculate the appearing time and radioactivity of 37Ar which transports to the ground after a nuclear explosion,the rock media in the test area is assumed to be a homogeneous porous media,without consideration of gas absorption by and release from the rock media.The seepage model in the porous media is used to calculate 37Ar transportation.Computational results give the time 37Ar leaks to the ground and the variation of its radioactivity with time.And we can analyze and consider the computational results when we have developed OSI noble gas monitoring systems and evaluated their effectiveness.