83 Matching Results

Search Results

Advanced search parameters have been applied.

The Gaseous Explosive Reaction: The Effect of Inert Gases

Description: "Attention is called in this report to previous investigations of gaseous explosive reactions carried out under constant volume conditions, where the effect of inert gases on the thermodynamic equilibrium was determined. The advantage of constant pressure methods over those of constant volume as applied to studies of the gaseous explosive reaction is pointed out and the possibility of realizing for this purpose a constant pressure bomb mentioned" (p. 479).
Date: June 24, 1927
Creator: Stevens, F. W.
Partner: UNT Libraries Government Documents Department

A SUMMARY OF THE WORK ASSOCIATED WITH THE SOLUTION AND UNDERSTANDING OF STRINGER-TYPE CORROSION IN ZIRCALOY-2 AND -3

Description: This report summarizes the work performed to eliminate stringer-type corrosion from Zircaloy-2 and Zircaloy-3. The investigation included a study of the melting and fabrication variables of the alloys. Metallographic and thermal treatment studies identified the problem to be inert atmosphere melting. Based on this work, a stringer formation mechanism has been postulated. (auth)
Date: April 1, 1959
Creator: Goodwin, J.G.; Rubenstein, L.S.; Grozier, J.D. & Shubert, F.L.
Partner: UNT Libraries Government Documents Department

BRIQUETTING OF MACHINED PLUTONIUM TURNINGS FOR RECYCLE TO THE CASTING OPERATION. Final Report-Production Test 235-6

Description: Twenty-four briquettes of Pu turnings were pressed in a He atmosphere and made into eight castings. Six castings were processed to final form and were comparable to normally processed material. Two castings were recy-cled due to causes other than briquetting. Casting y-ieids. (wt. of casting/wt. of briquettes). were approximately 90%; approximately 10% of the Pu in the briquettes remaining in the melting and pouring crucible as skull. (auth)
Date: November 7, 1952
Creator: Chandler, B. A.
Partner: UNT Libraries Government Documents Department

PRESSURIZATION OF HRE-3 WITH AN OXYGEN-INERT GAS MIXTURE

Description: Calculations made on the possibility of pressurizing HRE-3 with oxygen- helium and oxygen-argon mixtures indicate that such a system is feasible, but not necessarily more desirable than use of oxygen alone. The explosion hazard would not be reduced significantly by use of the inert gas and the off-gas design problems would be somewhat more difficult. (auth)
Date: April 15, 1958
Creator: Hilvety, N.
Partner: UNT Libraries Government Documents Department

HELIUM-PURIFICATION UNIT FOR HIGH-PURITY INERT-ATMOSPHERE BOXES

Description: A device for purifying and recycling the helium atmosphere of two dry boxes having a combined volume of 50 ft/sup 3/ is described. Trace impurities are removed by passing the helium through a palladium-catalyst container and a molec ular sieve bed and cooling to - 195 deg C before passing through an activated charcoal bed. Flow rates of 10 scfm and purity levels are estimated. Regeneration procedures are given. Construction prints and a schematic diagram of the heliumpurification unit are shown. (H.G.G.)
Date: December 1, 1962
Creator: Foster, M.S.; Johnson, C.E. & Crouthamel, C.E.
Partner: UNT Libraries Government Documents Department

M-25, Butt Welds in Process Piping

Description: Metal-arc and inert-gas shielded tungsten-arc processes were compared for circumferential butt welding of austenitic stainless steel process pipe. Inert-gas tungsten-arc welding was superior to other techniques. (C.J.G.)
Date: July 10, 1958
Creator: Litman, A. P.
Partner: UNT Libraries Government Documents Department

FABRICATION OF ALUMINUM CLAD PLUTONIUM-ALUMINUM ALLOY PIN ELEMENTS

Description: Specifications are given for the fabrication of Al--Pu alloy pins clad in aluminum. The cladding components were loy pins clad in alummum. The cladding components were fabricated from 1100 aluminum, 1/16 in. in diameter. End caps were fabricated from the same material by a series of passes through draw plates to 0.035-in. diameter. The core material was cast as cylinders 0.375 in. in diameter and approximately 2 in. long in a heated graphite mold. The alloy composition was 15.75 wt.% plutonium. Billets 1/4 in. long were cut from the cylinders. These were extruded through an 87 to 1 reduction in area to a final size of 0.032 plus or minus 0.001 in. For loading, the cans were inserted in a lucite fixture and placed in an open-front hood, the cores dropped in, and the can opening scrubbed with ethyl alcohol. The 0.035-in. diameter end cap wire was then pressed into the can opening until it contacted the core and was cut off level with the top of the can. Sealing of the final end was done by fusion welding using alternating current with the tungsten inert gas process. (W.L.H.)
Date: September 1, 1960
Creator: Lemon, L.C. & Ross, W.T.
Partner: UNT Libraries Government Documents Department

INVESTIGATION FOR THE PRODUCTION OF THORIUM METAL. Technical Progress Report--Fifth Quarter

Description: Processes for preparing a suitable ThCl/sub 4/ electrolyte free of H/sub 2/O and C/sub 2/ were investigated including chlorination with C -Cl/sub 2/, sulfur chlorides, NaCl, and preparation from anhydrous solvents. The method selected consisted of reacting ThOCO/sub 3/ with HCl, adding NH/sub 4/Cl, and heating in inert atmosphere to drive off NH/sub 4/Cl. (T.R.H.)
Date: December 17, 1953
Creator: Merlub-Sobel, M.
Partner: UNT Libraries Government Documents Department

GRAPHITE COMBUSTION HAZARD IN THE EGCR

Description: Factors influencing the possibility of a fire resulting from admission of air to the core of a high-temperature, graphite-mcderated, inert gas cooled reactor are considered. An excessive temperature rise in the core (graphite fire) may result if the rate of heat generation from internal sources exceeds the rate at which heat can be dissipated to the surroundings. Approximate calculations indicate that under several possible conditions of coolant system failure with admission of air to the core, a graphite fire could result. More accurate methods of calculation are outlined. Experimental studies and possible methods of fighting an existing fire are proposed. (auth)
Date: November 11, 1959
Creator: Prados, J. W.
Partner: UNT Libraries Government Documents Department

A CORROSION STUDY OF WELDED STAINLESS STEEL FUEL ELEMENTS

Description: Fuel element corrosion studies designed to and in selecting and evaluating SM-2 fuel element welding techniques are discussed. Tests on type 347 ss plate type fuel elements welded by the selected tungsten inert gas technique showed good corrosion integrity of specimens under a variety of conditions including a 500-hr test under simulated SM-2 conditions of flow and coolant chemistry. (auth)
Date: December 22, 1960
Creator: Bergen, C.R.
Partner: UNT Libraries Government Documents Department

SPRAY DEPOSITION OF CALCIUM METAL ON NICKEL OR INCONEL

Description: The inert--gas arc-spray method was studied in an effort to develop a continuous process for coating metals with calcium. Duplex electrode arc-spray equipment was used throughout the investigation. While the process appeared feasible, vapors produced during arc spraying and generally poor adhesion of the calcium to the base metal were considered the major deterrerts to the process. Other methods studied or investigated disclosed that the plasma-jet process improved the bonding between calcium and base metal, but that further research would be necessary to effect uniform coatings of calcium. The present state in Europe of arc-metal spraying was reviewed. No information on specific techniques was located in the literature. (auth)
Date: August 24, 1959
Creator: Haskins, A.F. & Evans, R.M.
Partner: UNT Libraries Government Documents Department