摘要 :
A compositional analysis procedure for LX-09 is presented. A gravimetric procedure is used to determine HMX content, and a liquid chromatographic technique used for the FEFO content. The PDNPA is determined by difference. An alter...
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A compositional analysis procedure for LX-09 is presented. A gravimetric procedure is used to determine HMX content, and a liquid chromatographic technique used for the FEFO content. The PDNPA is determined by difference. An alternate method for the binder content is presented and drawbacks to each analysis of the binder are discussed. (ERA citation 06:011483)
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The analytical procedure now utilized for the determination of the water-soluble material content in HNS is cumbersome and time consuming. This procedure, if possible, should be supplanted by an equivalent but less involved method...
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The analytical procedure now utilized for the determination of the water-soluble material content in HNS is cumbersome and time consuming. This procedure, if possible, should be supplanted by an equivalent but less involved method. (ERA citation 02:052845)
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The molar absorbanceted by the RSI/TRANCO finite-element computer code and results obtained by ORNL personnel for the Lyons, Kansas site. A determination of the transient temperature field for the room and pillar configuration tha...
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The molar absorbanceted by the RSI/TRANCO finite-element computer code and results obtained by ORNL personnel for the Lyons, Kansas site. A determination of the transient temperature field for the room and pillar configuration that is proposed for the New Mexico pilot-plant site is included along with an analysis of the thermoelastic stress distribution in the near-field vicinity of the sleeve-waste container at the New Mexico pilot-plant site. (ERA citation 03:004532)
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Boron carbide is used for control rods and as a shielding material in nuclear reactors. As such, the boron carbide must conform to rigid chemical specifications. Impurities present have a significant effect on the life time of the...
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Boron carbide is used for control rods and as a shielding material in nuclear reactors. As such, the boron carbide must conform to rigid chemical specifications. Impurities present have a significant effect on the life time of the control rods under conditions of high temperature and neutron flux. Therefore, methods for the accurate determination of the various constituents in boron carbide is of utmost importance. A volumetric procedure for the determination of boron content in boron carbide is discussed. (Atomindex citation 10:493516)
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A hole has been drilled in the roof of pharaoh Khufu's second boat pit with a drill and airlock system specially designed to exclude the exchange of outside air and the atmosphere inside the pit. Air samples have been obtained fro...
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A hole has been drilled in the roof of pharaoh Khufu's second boat pit with a drill and airlock system specially designed to exclude the exchange of outside air and the atmosphere inside the pit. Air samples have been obtained from three height levels inside the pit through an air probe inserted through the airlock. The air has been analyzed by gas chromatography for the chlorofluorocarbons F11, F12, carbon tetrachloride, and methyl chloroform, and for carbon dioxide, methane, carbon monoxide, nitrous oxide and hydrogen. The stability of the wet air samples in stainless steel and aluminum containers is unsatisfactory. The measurements of the air pressure in the pit during sampling as well as the composition of the air show that the boat chamber is not sealed. The present loss rate of the wood in the pit by decay is estimated to be between 200 g and 1000 g per year. The authors find evidence for substantial exchange of carbon between gaseous carbon dioxide and the limestone rock.
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An improved analytical method has been developed using inert-gas fusion for determining the nitrogen and the oxygen contents of uranium metal. The analytical method is applicable to concentrations of nitrogen and oxygen ranging fr...
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An improved analytical method has been developed using inert-gas fusion for determining the nitrogen and the oxygen contents of uranium metal. The analytical method is applicable to concentrations of nitrogen and oxygen ranging from 1 microgram per gram to 1000 micrograms per gram for each gas. In uranium metal, the limit of error for a single determination at the 95%-confidence level, at the 12-micrograms-per-gram-nitrogen level, is +-3 micrograms per gram nitrogen and, at the 20-micrograms-per-gram-oxygen level, is +-3 micrograms per gram oxygen. Nitrogen and oxygen concentrations are determined by using a nitrogen-oxygen determinator. (ERA citation 05:012217)
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After adjustment of the acidity the sample solution is treated with fluoride to depolymerize the silicon. The fluoride is complexed with boric acid and separated from the plutonium on a cation exchange column. Silicon in the eluat...
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After adjustment of the acidity the sample solution is treated with fluoride to depolymerize the silicon. The fluoride is complexed with boric acid and separated from the plutonium on a cation exchange column. Silicon in the eluate is determined spectrophotometrically as the silicomolybdate complex. (ERA citation 14:002819)
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