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- W39999563 abstract "For several years the philosophy of containment science in general and stemming design in particular has been to stop high levels of gas pressure and the associated radiation deep in the hole.'' The principal reason for this is that containment is not an exact science, so a factor of safety is achieved by trying to keep the radioactive products generated by the nuclear explosion as far underground as possible. The uncertainty stems from several factors, including the in-situ physical properties of the geologic materials, the specific mechanisms which cause formation of the residual stress field, the extent and nature of faulting, and the influence of water on overall containment. Other factors that are more certain are the location of geologic layers, the placement of the stemming materials and the physical properties of those materials. Lawrence Livermore National Laboratory has taken an aggressive stand with respect to making field measurements of pressure, radiation and ground motion in order to understand the process of gas flow in the stemming after an underground nuclear test. Calculational models at Los Alamos National Laboratory have been applied to this problem to determine the influence of bulk material properties on gas flow and the transport ofmore » radioactive contaminants. The purpose of this paper is to show how the field data may be used to calibrate the models in order to identify likely phenomena taking place underground. 4 refs., 15 figs., 2 tabs.« less" @default.
- W39999563 created "2016-06-24" @default.
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- W39999563 date "1989-09-01" @default.
- W39999563 modified "2023-09-27" @default.
- W39999563 title "The effect of cavity gas pressure and porous flow on stemming performance" @default.
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