Accession Number : ADA130292

Title :   Laboratory Investigation Of Containment In Underground Nuclear Tests.

Descriptive Note : Final rept. 15 Feb 81-15 Feb 82,

Corporate Author : SRI INTERNATIONAL MENLO PARK CA

Personal Author(s) : Cizek,J C ; Florence,A L

PDF Url : ADA130292

Report Date : 15 Feb 1982

Pagination or Media Count : 102

Abstract : In support of the DNA program for stemming and containment of underground nuclear tests, existing laboratory techniques were further developed and applied to investigate the mechanics of containing gases in cavities formed by underground nuclear explosions. The experimental procedure includes constant flow rate hydrofracture from a central exploded cavity in an externally pressurized grout sphere simulating a geologic material subjected to overburden. The experiments provide hydrofracture records consisting of the time history of cavity pressure as fluid is pumped into the cavity. Hydrofracture records for exploded cavities, which have a surrounding residual stress field, are compared with those for unexploded cavities, which have no residual stress field, to assess the potential benefit to containment of the residual stress field.

Descriptors :   *Nuclear explosions, *Underground explosions, Cavities, Containment(General), Fracture(Mechanics), Stress strain relations, Explosion gases, Stemming, Residual stress, Stress relaxation, Nuclear explosion testing, Laboratory tests, Grout

Subject Categories : Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE