15 research outputs found
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Sampling and characterization of sodium-water reaction products
The products of sodium-water reactions which had taken place in the Large Leak Test Rig at the Liquid Metal Engineering Center were sampled and characterized. The products consisted of the expected compounds in the Na-O-H system, and dissolved readily in ethanol. Removal of such products from a system by melting and draining does not appear feasible, but removal by dissolution in alcoholic solvents should be investigated further
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Sampling and characterization of sodium-water reaction products
Sodium-water reaction products (SWRP) which had accumulated in the bottom of the reaction products tank (RPT) of the Large Leak Test Rig (LLTR) were sampled and characterized. Analysis showed that the SWRP consisted of NaOH, Na/sub 2/O, NaH, and Na, as expected, in varying proportions. The unreacted sodium in the samples examined ranged from 32 to 60% by weight. The SWRP reacts (dissolves) rapidly and completely with ethanol, and somewhat less rapidly and completely with Dowanol PM. A magnetic, metallic residue was left, originating in the Croloy of the test article in the LLTR. These solvents should be investigated further as possible agents for cleaning sodium systems that are highly contaminated with water reaction products. The SWRP does not completely liquefy with heating to 800/sup 0/F (427/sup 0/C). Although it softens to a consistency similar to that of wet sand, it is unlikely that it would flow or could be pumped even at such elevated temperature. The presence of highly corrosive molten NaOH. (above 606/sup 0/F, 319/sup 0/C) also makes the hot draining of SWRP unattractive
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Sodium vapor deposits observed at HEDL on large components
Testing of the Fast Flux Test Facility (FFTF) components in the High Temperature Sodium Facility (HTSF) has provided operating experience with sodium vapor deposits prior to reactor operation. Large component testing in liquid sodium at temperatures up to 1100/sup 0/F (593/sup 0/C) has simulated the thermal operating conditions of the FFTF including the evaporation rate of sodium from the surfaces of high temperature sodium. Testing of several plant scale components with various reactor head plug gap configurations has made it possible to evaluate the influence of annuli gap clearance on sodium vapor deposits. The dimensions of the annuli are described, followed by details of the operating conditions of their exposure to sodium vapor and observations of the amount and character of vapor deposits
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Results from shallow research drilling at Inyo Domes, Long Valley Caldera, California and Salton Sea geothermal field, Salton Trough, California
This report reviews the results from two shallow drilling programs recently completed as part of the United States Department of Energy Continental Scientific Drilling Program. The purpose is to provide a broad overview of the objectives and results of the projects, and to analyze these results in the context of the promise and potential of research drilling in crustal thermal regimes. The Inyo Domes drilling project has involved drilling 4 shallow research holes into the 600-year-old Inyo Domes chain, the youngest rhyolitic event in the coterminous United States and the youngest volcanic event in Long Valley Caldera, California. The purpose of the drilling at Inyo was to understand the thermal, chemical and mechanical behavior of silicic magma as it intrudes the upper crust. This behavior, which involves the response of magma to decompression and cooling, is closely related to both eruptive phenomena and the establishment of hydrothermal circulation. The Salton Sea shallow research drilling project involved drilling 19 shallow research holes into the Salton Sea geothermal field, California. The purpose of this drilling was to bound the thermal anomaly, constrain hydrothermal flow pathways, and assess the thermal budget of the field. Constraints on the thermal budget links the local hydrothermal system to the general processes of crustal rifting in the Salton Trough