Possible locations of the projected 40-tube overbore facility at the C Reactor are discussed from the standpoint of obtaining conversion ratio data applicable to a full-reactor overbore program.

The purpose of this document is to assembly certain job elements which may become part of the Advanced Engineerng Subsection programs, so that those individuals who may be requested to participate in such programs may be aware of the nature and form of Advanced Engineering planning.

Goats under Nembutal and mice were exposed in a shock tube modified to give longer-duration overpressures and equipped with ports for photography. Except for ear damage, displacement still seemed to be the major cause of injury in goats in the 4-foot section of the tube. However, it was found that mice were killed, apparently by pure blast, in a particular position in a particular type of side chamber attached to the higher-pressure, smaller-diameter, section of the tube. The relation between maximum velocity of displacement and the distance animals were thrown was fairly regular. The probability of injury over different terrains is discussed. (auth)

The 60-in. scattering chamber used with the external beam of the Argonne 60-in. cyclotron is described. The scattering chamber permits operation over an angular range from 4 deg to 176 deg with an accuracy of plus or minus 3 min. of arc. The geometrical factors involved in the measurement of cross sections are known to plus or minus 0.1% or better. The angular positions of the detectors, the target changer, and an absorber foil system in front of the detection units are operated by remote control so as to permit continuous operation of the cyclotron when these parameters are varied. It is possible to operate several detectors simultaneously; and in order to permit angular correlation studies, the angular position of one detector can be varied by remote control with respect to the other detector units. A summary of some of the experimental work performed with this instrument is given. (auth)

The effect of extracted zirconium and nitric acid upon the chemical stability of tributyl phosphate was investigated using gas-liquid chromatography. Tributyl phosphate was degraded approximately 1000 times faster by the tributyl phosphate-zirconium reaction than by the tributyl phosphatenitric acid reaction. Normal butyl nitrate was the major volatile product for both systems studied; with extracted zirconium a solid complex corresponding to the formula Zr(NO/sub 3/ )/sub 2/(DBP)/sub 2/ was also obtained. (auth)

The current interest in the subject of fiber optics has brought about, among its many achievements, the development of a new technique for measuring refractive index. An instrument designed as a light-pipe refractometer or rod photorefractometer has been described by Kapany and Pike. these authors have presented both a theoretical study of the phenomenon and experimental results arising from a prototype apparatus. The range of applicability of such a device is limited, however, by the availability of rod materials having suitable refractive indices. In particular, the available solid material which has the lowest refractive index and which is also transparent is fused quartz (n{sub D} = 1.458). For reasons inherent in the geometry of the photorefractometer optics, the use of quartz rods does not permit high sensitivity of measurement on liquids having refractive index values less than 1.44. Aqueous solutions, therefore, are beyond the range of study of a system using solid rods. Kapany and Pike suggested the possibility of replacing the solid rod with a hollow cylindrical glass tube filled with a standard liquid. In this manner the effective refractive index of the light pipe is that of the reference liquid and can be varied over the complete range …

The oxidation of graphite in the Hanford reactors is of consequence since graphite burnout affects the strength of the moderator. As a means for indication of any highly oxidizing condition within the stack, containers or boats of small weighed samples of reactor-grade graphite are positioned along the length of an empty process channel in each reactor. The rate of oxidation of the monitoring samples, referred to as the burnout rate, is reported as percent weight lose per 1000 operating days (%/KOD). Currently the burnout rate limit is 2%/KOD. This document presents recent burnout data at the C-reactor.

This report for March 1961, from the Chemical Processing Department at HAPO, discusses the following: Production operation; Purex and Redox operation; Finished products operation; maintenance: Financial operations; facilities engineering; research; and employee relations.

S>Surface ionization results for natural boron isotopic analysis are in agreement with other recent investigations indicating a B/sup 11//B/sup 10/ atom ratio nesrer to 4.00 than the more commonly accepted value of 4.31 based on BF/ sub 3/ analysis. (auth)

The preliminary design is described of equipment to carry out experiments on boiling burnout in which the average coolant density as a function of coolant channel length as well as local coolant densities may be measured. It appears that by use of the equipment, average densities can be accomplished in a few seconds, while determination of a complete density map (with 5% error) across a plane of the assembly requires approximately one hour. (J.R.D.)

Tests were conducted to obtain data on the dynamic response of the plant to various power range control rod withdrawal transients. The Reactor plant responded generally as expected. Comparison of data with simulator studies revealed that transients were more severe and had less measurable differences between the 20, 40, and 60% power runs than those transients predicted. (J.R.D.)

Reported DSN calculations of reactivity worths of heterogeneities in ZPR- III fast critical assemblies, caused by use of various fuel plate and diluent thicknesses, have shown the necessity for high-order approximations to obtain convergence of flux shape and eigenvalue. Convergence properties of solutions for a simplified two-region, oneenergy-group, repetitive slab cell having regional thicknesses and regional cross sections representative of those encountered in some energy -groups of the previous threegroup study are compared for DSN (N = 2, 4, 8, 16), singlespherical harmonics, PN (N = 1, 3,...., 11, 13), and double spherical harmonics, DPN (N = 1, 2, 3, 4, 5), solutions for the case of a spatially constant unit source density in the alternate regions of the cell. Analogous uncollided flux solutions and an integral transport solution for uncollided flux showing effects of contributions of sources in neighboring cells upon the solution are obtained. As the angular width of the anisotropic flux component occurs predominantly in the region about mu = 0, the "shape" of the spatial flux is largely determined by at most a few nearestneighbor source regions, and the anisotropic component is largely the anisotropic component of the uncollided flux. Use of either a discrete ordinate …

Corrosion studies were conducted on stainless steel types 347 and Carpenter-20, Monel, titanium 55A, and tsntalum in decontamination solutions. These solutions are: 10% nitric acid, 10% citric acid, 10% sodium hydroxide--2.5% tartaric acid, 10% oxalic acid, 0.003M periodic acid in 0.05M nitric acid, 3% sodium fluoride --20% nitric acid, Turco 4501 and Turco 4502, and 0.25M phosphoric acid. Boron stainless steel type 304L was studied in 10% sodium hydroxide--2.5% tartaric acid, 10 and 60% nitric acids, Turco 4501 and Turco 4502. The two austenitic stainless steels were found to be acceptable construction materials for handling each of the decontamination solutions except 3% sodium fluoride--20% nitric acid. Special limitations are defined for Monel, titanium 55A, and tantalum when exposed to decontamination reagents. (auth)

The corrosion behavior of pure aluminum and some of its alloys in superheated steam was found to depend markedly on the method of starting the corrosion test. Pure aluminum samples survived only in tests that were brought to temperature and pressure very rapidly. Resistant Al-- Ni-- Fe alloys performed well only if a relatively slow starting procedure was used, suffering extensive blistering or complete disintegration in a test started rapidly. Over the range of temperature and pressure investigated, 400 to 540 deg C and 150 to 600 psig, with optimum starting conditions both pure aluminum and resistant Al-- Ni-- Fe alloy samples quickly formed a very protective oxide film. Interference colors were noted for exposures of several weeks. Samples surviving a 260-day test at 540 deg C and 600 psig had less than 1-mg/cm/sup 2/ weight gain. Nonresistant alloys disintegrated in short corrosion exposures. A penetrating attack, initiated in only a few spots, rapidly destroyed the samples. The effects of composition, dispersion of second-phsse compounds, hydrogen porosity, and pretreatments were investigated for 5.6% Ni--0.3% Fe-0.1% Ti in 540 deg C, 600-psig steam. It was concluded that porosity produced by corrosion product hydrogen was a major factor in the survival of …

Corrosion tests in dilute phosphoric acid (pH 3.5) at elevated temperature are described for X8001 aluminum, 18-8 stainless steels, aluminized carbon steel, and Zircaloy. In a 307-day dynamic test at 18 ft/sec and 315 deg C, X8001 aluminum corroded at a rate of 1/2 mdd for the first 240 days. In subsequent exposures, the corrosion rate increased, but the total average penetration at 307 days was only 0.0005 inch. At 200 days, the total corrosion in this test was one-fiftieth that in distilled water. Static tests at 225 deg C gave corrosion rates too low to measure (<0.2 mdd). Of several different 18-8 stainless steels tested in this solution at 315 deg C, only sensitized type 316 suffered intergranular attack. General attack rates of the other samples, of the order of 1/4 mdd, were obtained for the period from 94 to 186 days. Although this is much larger than the rate in distilled water, it represents a penetration rate of only about 5 x 10/sup -//sup 5/ inch/year. Aluminized carbon steel did not suffer rapid corrosion in this solution at 315 deg C, even when large areas of the carbon steel were exposed. There was a tendency for corrosion to …

The proposal to reduce P{sub 32} in reactor effluent by increasing aluminum sulphate and bauxite feed to 18 ppm while maintaining 7.0 pH water is estimated to cost $1,368,000. This represents an increase of $507,000 over FY 1962 budgeted cost for aluminum sulphate, bauxite and sulphuric acid. The basis for the cost estimate is provided, and detail calculations are given.

Three Pu preparations were made and partially characterized. These preparations were one pure PuO/sub 2/ preparation via the batch-oxalate route and two PuO/sub 2/-UO/sub 2/ preparations containing 0.5 and 20 at.% PuO/sub 2/ via the continuous coprecipitation route. The PuO/sub 2/ preparation, which had the largest surface area of the preparations (29 m/sup 2//g), tended to pick up weight when exposed to the box atmosphere. Dry pressing and sintering studies were conducted on the PuO/sub 2/ preparation. The results indicate that the sintered density of PuO/sub 2/ pellets is independent of green density above 5.6 and 6.0 g/cm/sup 3/ for pellets sintered at 1600 and 1400 deg C, respectively. Preliminary reactor physics calculations for near-thermal reactors indicate that extremely long core lives can be attained with a fuel of initial composition 78 at.% Pu/sup 239/, 12 at.% Pu/sup 240/, and 10 at.% Pu/sup 24 / 1>s, and that the reactivity variation during core life is nominal. (D.L.C.)

ABS>An experiment was performed to determine the effects of nonpickling versus pickling to depths of one and two mils on the corrosion resistance of Zircaloy-2 machined by various methods. No significant difference in corrosion rate between pickled and unpickled Zircaloy-2 was found, provided that properly sharpened and hardened tools were used. (auth)

An analysis of the EGCR core structure was made to determine the lateral deflections (bowing) of the graphite columns resulting from shrinkage caused by fast-neutron irradiation, the life expectancy of each column due to restraints imposed on the bowing, and the reaction forces induced in the supporting structures. Based on currently avallable data for EGCR type graphite shrinkage and assuming experimental loop operation, a maximum bowing potential of 3.61 in. was calculated for an interior column. It was found that strains equivalent to the rupture strains observed from tensile tests could be expected after 4 to 6 years of full-power operation. Over half of the columns will reach these strains before the 20-yr reactor design life is reached. (auth)

Two types of electron polarization operators are surveyed. A three- vector operator is described that is appropriate for calculations involving plane- wave states. A four-vector operator is described that can be used for taking account of external electromagnetic fields. (T.F.H.)

Research with 28-Mev N/sup 3+/ ions from the ORNL 63-Inch Cyclotron included studies of elastic and inelastic scattering, of angular distributions from transfer reactions, and of nuclear reactions resulting in the evaporation of alpha particles and protons. The research program associated with the 22-Mev protons from the ORNL 86-Inch Dyclotron lncluded studies of bound states of neutrons, the investigation of energy levels in neutron-deficient rareearth nuclei, and the production of neutron-deficient radiolsotopes. Theoretical studies are belng made for the interpretation of both proton-induced and nitrogen- induced reactions with distorted-wave Born approximatlon calculations and with the optical model. Fabrication and assembly of Cyclotron Analogue II are nearing completion. The building for the Oak Ridge lsochronous Cyclotron was completed. The final design work is well advanced; the major heavy components were fabricated and are being installed. (For preceding period see ORNL-3047.) (auth)

Recently a T = 1 resonance in the {Lambda}{pi} system called Y*{sub 1} has been observed with a mass of 1385 Mev. Two types of resonances have been predicted that might relate this observation to other elementary-particle interactions: (1) P 3/2 resonances in the {Lambda}{pi} and {Sigma}{pi} systems predicted by global symmetry corresponding to the (3/2, 3/2) resonance of the {pi}N system; (2) a spin-1/2 Y-{pi} resonance resulting from a bound state in the KN system. The position and width of the observed Y*{sub 1} resonance agree with both theories, but since the spin and parity have not yet been determined, it is impossible at present to distinguish between the two theoretical interpretations.

Evaluation of dry films for application on spur gears for - servicing components of a gas-cooled nuclear reactor was performed. Commercial dry film lubricants were screened in wear tests to obtain the optimum lubricant which was in turn used in gear teats. A MoS/sub 2/, graphite, and sodium silicate binder lubricant (Everlube 811 or equivalent) applied to M 50 tool steel gears resulted in the optimum combination based on stress cycle tests. Tests were performed on uniubricated worm gears at simulated loads, speeds, and environment of the charging machine for the above reactor to determine wear rates and efficiencies. (auth)

In previous letters the authors have reported a {Sigma}{pi} resonance observed through the study of the interaction of 1.15-Bev/c K{sup -} meons in hydrogen in the Lawrence Radiation Laboratory 15-in. bubble chamber. They now wish to report the results of the study of the three reactions: (1) K{sup -} + p {yields} {Sigma}{sup +} + {pi}{sup -} + {pi}{sup -} + {pi}{sup +}; (2) K{sup -} + p {yields} {Sigma}{sup -} + {pi}{sup +} + {pi}{sup +} + {pi}{sup -}; and (3) K{sup -} + p {yields} {Sigma}{sup 0} + {pi}{sup 0} + {pi}{sup +} + {pi}{sup -}. Although reactions (1) and (2) are readily identified and measured, reaction (3) cannot be identified unambiguously. Accordingly, they discuss first the results pertaining to reactions (1) and (2). Nineteen events of type (1) and 13 events of type (2) were observed, corresponding to cross sections of 0.19 {+-} .06 and 0.12 {+-} .05 mb, respectively. In a search for possible {Sigma}{pi} resonances, they have plotted in Figure 1 histograms of the invariant masses of the {Sigma} and each of the three pions in reactions (1) and (2). Figure 1b refers to the {Sigma} and pion of like charge; Figure 1a to the …