A study into the use of sulfamic acld as a nitritedestroying reagent in the controlled-potentlal coulometrlc tltratlon method for uranlum(VI) was made. When nltrites are thus destroyed, the tltration ls much less subject to error from HNO/sub 3/. The results of titratlons of known amounts of uranlum(VI) in the presence of varlous amounts of HNO/sub 3/, Th(NO/sub 3/)/sub 4/, Al(NO/sub 3/ )/sub 4/, and LiNO/sub 3/ are given. (auth)

In the AlSi process, the I&E fuel element is assembled in a two-piece aluminum container consisting of an outer cylindrical shell and an inner tube containing an integrally impacted cap wafer which forms the top end and cap during canning. Both autoclave failures and reactor failures have been attributed to porosity in the AlSi and non-wetting of the aluminum wafer with AlSi. Porosity and non-wetting in the area of the cap closure provides a pathway for water to penetrate through to the uranium from small defects in the weld which are not detected by visual weld inspection or radiography. These quality deficiencies are caused from two apparent fuel problems, (1) the disparity in mass between the spire and cap wafer which results in uneven pre-heating rates for spire and cap wafer and freezing of gas bubbles under the cap wafer, and (2) the heavyoxide and lubricant contamination on the underside and side of the wafer which causes non-wetting and outgassing. In December, 1958, an additional cleaning step was introduced in the 313 Manufacturing process to improve cap wetting. This change involved degreasing followed by a caustic etch to remove imbedded lubricants in the cap wafer. It was effective in reducing …

A digital-to-analog converter is described which is a part of a system that converts punched-tape digital data to analog data in a series of points drawn by an x-y plotter. The converter is designed to plot accurately tapes that contain information other than coded numerical coordinates. Operation of the converter is also described along with format requirements and power supplies. (J.R.D.)

A digital-to-analog converter is described which is a part of a system that converts punched-tape digital data to analog data in a series of points drawn by an x-y plotter. The converter is designed to plot accurately tapes that contain information other than coded numerical coordinates. Operation of the converter is also described along with format requirements and power supplies. (J.R.D.)

None

The separation of isotopic mixtures containing three components in a gaseous diffusion cascade operating over an infinite reservoir is discussed. The flow distribution yielding the smallest total flow per unit product was found and compared with the flow distributions in some other theoretical cascades. Curves are presented to show the number of stages required, the total flow and the concentration gradients for both light and middle isotope separation. (auth)

The work described in this report was authorized under Development Test IP-419-E. The primary objective of this study was to establish the stress, hydraulic and vibration conditions which exist in KE Reactor rear face piping components under maximum presently authorized operating conditions and evaluate these conditions from the standpoint of continuity of reactor operation. Test data were recorded at various levels of operation up to and including the maximum authorized bulk outlet temperature. The data recorded during this test were used to establish model conditions for Project OGI-883. With model conditions established, additional tests will be conducted to explore the possibility of operating the reactor in regions above the present limiting bulk outlet temperatures. The test, as outlined in the development tests document, has been conducted and the pressure, temperature, vibration, and stress data has been tabularly and graphically compiled. Indicated hydraulic conditions have been substantiated theoretically with reasonable accuracy. A drawing indicating the instrumentation locations is provided in Appendix IV of this report.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Whether the Texas Highway Department has the authority to purchase steel for the manufacture of license plates and whether appropriated funds are available for the purchase of such steel and related questions.

Two methods were used for predicting the maximum permissible burnup in type 3 (SM-2) fuel plates: use of analytical models and use of existing irradiation data on UO/sub 2/ stainless steel dispersion fuel plates. Results with two analytical models indicated that burnups above 100% U/35 are permissible. Comparison of the expected burnup with available irradiation data indicates that successful performance of type 3 replacement cores in SM-1, SM-1A, and PM-2A can be expected. (auth)

The problem of tube collapse by external pressure has been investigated experimentally. A graphical solution developed to simplify inelastic collapse design problems was shown to agree with the test results. The von Karman reduced modulus was used in the graphical solution to correct for the stress redistribution caused by yielding. The effects of the geometric imperfections of ovality and wall thickness variations on collapse pressure were shown to be related to the stress-strain behavior of the material. The concept of a critical time'' was discussed in regard to creep-buckling phenomenon. (auth)

Graphite expands linearly with irradiation at temperatures below 250 deg C and develops stored energy of the lattice because of interstitial and vacancy defects. Radiation changes such as stored energy and dimensional expansions can be removed by thermal annealing in which the graphite is removed from the radiation field and heated to a temperature above the irradiation temperature. The thermal annealing of irradiated graphites shows that the greater the irradiation dose, the greater is the recovery obtained at a given temperature. In periodically irradiated graphites, the 200 deg C stored energy no longer increases as it does in continuously irradiated graphites. Thermal annealing not only removes radiation damage but redistributes and creates it. (H.G.G.)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Authority of the Interim Committee on Migrant Labor to expend State funds for the employment of Legal Counsel, research staff or clerical help.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Whether the National Guard or the State of Texas is required to pay additional medical or hospital expenses to or on behalf of servicemen in the event of further treatment or rehospitalization under the facts stated, and related questions.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Exemption from ad valorem taxes of property belonging to The Cartmell Home for Aged and Orphans.

The Pebble-Bed Reactor Experiment (PBRE) was designed to advance the pebble-bed concept by providing a test of characteristic features and make contriliutions to the general development of all-ceramic gas-cooled reactors. The following objectives were established for the reactor experiment: to investigate key features of the pebble-bed concept, including on-stream fuel handling, movement of fuel through bed, and performance of core; to obtain operation and maintenance experience with a system contaminated with fission- product activity; and to investigate the behavior of graphite fuel elements. A fourth objective, study of the behavior of core materials at conditions occurring with exit gas temperatures in the range 2000 to 2500 deg F, was tentatively included. The preliminary design oE a 5-Mw(t) reactor for achieving these objectives was prepared. The core of the PBRE is a 2 1/2-ft-diam, 4-ft-tall cylinder containing approximately 12,000 spherical graphite fuel elements 1 1/2 in. in diameter. Fuel spheres are added to and removed from the core by gravity flow, and these operations are performed while the reactor is at power by using pairs of valves for passage of elements into and out of the high-pressure system. Exposed fuel can be recycled to the top of the core. Helium coolant …

The development of the system and techniques to permit determination of strains at right angle to the axis of loading in the specimen was continued. An additional optical system was developed to accept the lateral image of the gage points and project a vertical image of the same proportion to the apertures of the strain analyzer. Using a dummy specimen of steel in the load train, the automatic pressure control system for the gas-bearing universals was operated. A fluctuation of gas pressure occurred within the bearings. Multiple progressive fracture planes were observed throughout the gage length of fractured graphite and tungsten. (M.C.G.)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Whether the County Auditor can approve for payment a claim by a Court Reporter for a transcript made of Grand Jury proceedings under the following facts.

Experimental data were collected on over 70 light water moderated, fully enriched uranium, stainless steel, critical cores. An equation for the critical mass of cores with a buckling of 0.007 cm/sup -2/ that is lineally dependent on stainless steel volume fraction and grams of B/sup 10/ was compared with available critical experiments and found to yield reasonable results. A correlation method, relating buckling to ( xi SIGMA /sub s// SIGMA /sub a/) was found to fit the available experiments. (auth)

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Whether a political party has authority to nominate a candidate for the office of County Tax Assessor-Collector to go on the General Election ballot, where the incumbent Tax Assessor-Collector died with more than two years left in his term of office, such death occurring too late to select a nominee at the Primary election.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Whether the term "Highway Post Office" vehicle as used in Article 827a, Section 8(b) applies to contract carriers of U.S. mail.

Document issued by the Office of the Attorney General of Texas in Austin, Texas, providing an interpretation of Texas law. It provides the opinion of the Texas Attorney General, Will Wilson, regarding a legal question submitted for clarification: Under Section 6 of Article 8306 of Vernon's Civil Statutes, should the first day when an injured employee is unable to perform his regular task for any part of such day be counted as the first day of incapacity for purposed of this section?

Report documenting the progress of the Army Gas-Cooled Reactor Systems Program to develop a mobile, low-power, nuclear power plant for Military field operation.

Measurements made at ORNL to study the feasibility of boiling detection in a water-cooled nuclear reactor are described. The methods selected for the detection of boiling include measurement of the acoustical noise produced by the generation of bubbles and measurement of changes in the reactor-power spectral density produced by bubbles. Preliminary results indicating that both methods could detect boiling are shown. (auth)

Up-to-date descriptive material and dimensional sketches of the ORNL Graphite Reactor and its experimental facilities are presented. (P.C.H.)