Report presenting an investigation of the accuracy of a currently used method for predicting the dynamic lateral oscillatory characteristics of airplanes. The study involved the comparison of controls-fixed flight-test data from several current fighter-type jet airplanes with the calculated values of period and damping for the airplanes.

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"The drag and pressure recovery of a scoop-inlet model have been investigated at transonic speeds by the free-fall testing technique over a Mach number range from about 0.8 to 1.12. Tests were conducted at zero angle of attack, using both rounded and sharp lips at mass-flow ratios from about 0.6 to 0.9. The results indicate that the Mach number of drag divergence of the scoop-inlet model was about the same as that of the basic model without inlets which was tested previously" (p. 1).

A photogenic map of the Orange Cliffs-14 quadrangle, Garfield County, Utah.

Report issued by the Argonne National Laboratory covering the quarterly report from the Reactor Engineering Division. A summary of reactor programs, designs, development, and experiments are presented. This report includes tables, illustrations, and photographs.

The purpose of the investigation was to locate new uranium ore deposits and sites which are favorable for exploration drilling.

The work reported here is a continuation of that reported in UCRL-1962. Approximate breakdown voltages and spark damage estimates have been made for the metals Ag, Ti, Aluminum Alloy 52-SO, Stainless Steel 316 and various combinations of Inconel and Cu.

Abstract: "The purpose of the investigation was to study the effects of gamma radiation from a cobalt-60 source on the physical properties and halogen evolution from the plastics polyvinyl chloride and polymonochlorotrifluoroethylene. Samples exposed for 2 to 28 days to a source of approximately 25,000 Roentgens per minute showed an appreciable evolution of both fluorine and chlorine. Tests on polymonochlorotrifluoroethylene for tensile, impact, and shear strength showed rapidly decreasing values as the radiation exposure was increased. Similar physical tests on exposed polyvinyl chloride showed increased impact and shear strengths and a lower tensile strength."

From introduction: This report contains the results of field tests for the U.S. AEC on the use of the seismic geophysical method for tracing "buried channels" in the Monument Valley area, Arizona.

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The three main chemical problems of non-aqueous fluidfuel reactors are selection of a fuel system which meets nuclear and thermal requirements, control of corrosion of structural materials, and development of an efficient and economical separation process. The problems of the fastneutron reactor with a core of fused NaCl, PbCl/sub 2/, UCl/sub 4/ mixture and a blanket of fused UCl/ sub 4/ are discussed, except for the separation process. Brief treatment is given the Bi- U - Pu fuel system for thermal reactors, including tentative flowsheets for the separation process. A detailed discussion of the experiments of Bareis at Brookhaven and related experiments on the distribution of various metals between liquid Bi and fused-salt solutions is given, the experimental results correlated, and application made to reactor problems. A general discussion is given of nonaqueous high-temperature separation processes (L.M.T.)

The following report describes a successful procedure used for the determination of americium in the presence of plutonium. Provided are articles listed that describe the research done in developing the method.

This report is a memorandum requesting that two swaged thorium rods being held a MIT be sent to the Savannah River Plant for examination. The memorandum is dated October 15, 1952.

Periodic solids purges of reactor process tubes are necessary to remove the film deposition on slugs and tubes. This film is undesirable for it constricts the water annulus, and thereby reduces the flow of cooling water and impedes the transfer of heat from slugs to the water. Prior to February, 1951, purging was accomplished only while the reactor was in a non-operating status. Subsequently, the feasibility of successful film removal during operation has been demonstrated in accordance with the provisions of Production Test 105-417-P, ``Process Tube Purges During Reactor Operation.`` This document reviews, in the light of additional purging experience, the initial test results, which are recorded in HW-20717 and subsequent purging experience to consider the desirability of adopting the use of this purging technique as a standard practice when reactor power levels are restricted by excessive film formation in the process tubes.

From Summary: "A 1/4-scale dynamically similar model of the XFV-1 airplane has been flown in the Ames 40- by 80-foot wind tunnel, using the trailing flight-cable technique. This investigation was devoted to establishing the flight characteristics of the model in forward flight from hovering to wing stall, and in yawed flight (wing span alined with the relative wind) from hovering to the maximum speed at which controlled flight could be maintained. Landings, take-offs, and hovering characteristics in flights close to the ground were also investigated."

"An apparatus was designed and fabricated to obtain film samples from irradiated process slugs. This apparatus has been used to obtain film samples from slugs of the sodium dichromate elimination test."

It is considered appropriate occasionally to make independent checks on the effectiveness of the plant laundry in removing radioactive contamination from plant-issue protective clothing. Previous surveys have offered constructive criticism resulting in improved handling of high level and soft beta contaminated clothing and incorporation in new designs of ventilating and air sampling recommendations. Recurrently the adequacy of laundry reject limits is questioned, and only recently an accurate, special study resulted in relaxed limits for Metal Preparation area clothing. A current question concerns the advisability of determining the reject level on the beta-gamma monitor more frequently than once a day. 2 tabs.

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A process for production of pure Be/sub 2/C by using the re action between beryllium and graphite powders at about 1000 deg C described. The effects of variables such as stoichiometry, reaction temperature, beryllium- powder particle size, and process-apparatus construction materials are discussed. (J.R.D.)

"The St. Louis Refinery produced its first UO3 and UO2 in 1942, and its first UF4 and U metal in 1943. The accent has always been on production, and the function of the extremely small research and development groups has been to aid the production units in their job. ... Recently, there has been a growing realization of the need for a broader and more detailed knowledge of both the chemical and technological aspects of all phases of work. ... This is the first of a series of quarterly progress reports on the research and development activities at the St. Louis Refinery."--p. 6

This memorandum discusses slug rupture frequency which appears to be a factor that may limit the power level of C Pile. Since additional exposure of Group 8 uranium slugs has increased the available information on the behavior of material similar to that which will be charged into C Pile, a review of this tube power limitation has been made. Utilization of additional data has been possible by use of the revised method of calculating rupture rates discussed in reference (2).

Report presenting a wind-tunnel investigation at low speeds to determine the lateral-control and hinge-moment characteristics of a 20-percent-chord, unsealed, partial-span outboard aileron equipped with an overhang, a paddle, or a spoiler balance on a tapered 51.3 degree sweptback semispan wing model with an aspect ratio of 3.05. The aileron effectiveness was not greatly affected by the overhang or paddle balance, but the spoiler balance increased the effectiveness obtained with the plain flap.

The test established that a practical orifice selecting device can be made and used to control the water flow rate to a process tube at either of two accurately calibrated rates with no loss of accuracy in flow measurement. With the selector tested, there was no flow restriction during the orifice transition. The pressure fluctuations during the change were small in magnitude, and caused no operational problem. The test demonstrated that orifice selection is feasible from operating other factors justify their use.

Memorandum presenting an investigation of the rolling effectiveness of a partial-span, perforated spoiler on a wing with 45 degrees of sweepback at Mach numbers from 0.25 to 0.96. The effects of the spoiler on the lift, drag, and pitching moment were also determined. Results regarding Reynolds number, Mach number, and predicted rate of roll are provided.