SUMMARY TECHNICAL REPORT FOR THE PERIOD OCTOBER 1, 1955 TO DECEMBER 31, 1955, VOLUME I.

Author:: Simmons, J. W.
Published:: United States : [publisher not identified], 1956.
[Oak Ridge, Tennessee] : [U.S. Atomic Energy Commission], 1956.
Physical Description:: microopaque : positive ; 8 x 13 cm

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Summary:

Laboratory tests showed that there is a direct relationship between the sulfur content of Q-11 ore and its digestion reactivity. It was also shown that roasting the ore decreased this reactivity. Rum Jungle uranium concentrate was evaluated and results indicated that this material can be processed in the NLO Refinery. Pilot Plant extraction tests on South African ore showed that no difficulty should be experienced in processing this material. Process modifications in the 33.5% TBP flow sheet were required. The progress of chlorine through the HNO/sub 3/ concentrator and the ozonation system was studied. It was found that 41% of the ozone was consumed in the hot nitric acid, either by side reactions or by decomposition. Studies made in the hexafluoride reactor indicated that use of a cyclone-type premixer is a good method for injecting reactor feed gases. Copper was proved not to be a satisfactory material for the UF/sub 6/ reduction reactor. Tests were made of Port Hope UO/sub 3/ to determine its reactivity index. Reduction of UO/sub 3/ and hydrofluorination of powdered UO/sub 2/ were studied in the thermal balance. An apparatus was developed for measuring the temperature along the screw of a reduction reactor. Stainless steels showed much better resistance to corrosion than did high-nickel alloys in the reaction zone of UO/sub 3/ reduction reactors. It was determined that set time and tackiness of UO/sub 3/--H/sub 2/O mixtures are functions of temperature and water content. Water addition to UF/sub 4/ seemed to improve derby yield and appearance when slag liners were used. A method for the elimination of secondary pipe in production ingots was demonstrated. Several types of refractories were evaluated in production furnaces. Special melting and casting techniques were used to insure homogeneity of uranium alloys and for the casting of uranium containers. A simplified process for the recovery of uranium from enriched scrap was developed. The phosphate method of recovering uranium from C-oxide was found to give a better grade product than the NH/sub 4/OH precipitation process. Al(OH)/sub 3/ was found to be the most effective aluminum compound in inhibiting the corrosion of stainless steels by fluoride-containing dolomite digestion solutions. (auth)

Report Numbers:

NLCO-600(Rev.)(Del.)

Other Subject(s):

Collection:

U.S. Atomic Energy Commission depository collection.

Note:

DOE contract number: AT(30-1)-1156
NSA number: NSA-15-029270
OSTI Identifier 4842875
Research organization: National Lead Co. of Ohio, Cincinnati.

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