Flow through porous media from a nuclear cavity

The transport of fluid from the cavity formed by an underground nuclear explosion was investigated. Driven by the high cavity pressure, steam and noncondensing gas enter the surrounding porous medium. Their subsequent motion through the medium is described and the extent of penetration determined. The relations governing the transport are presented. An implicit iterative computational method is developed. The relative merits of this technique are discussed. The method is applied to a nuclear test. Results of calculations are presented and discussed