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Description: This report supersedes K-1-3425 and LA-2327(Prelim). The first experiment (LAMPRE I) in a program to develop molten plutonium fuels for fast reactors is described and the hazards associated with reactor operation are discussed and evaluated. The reactor desc=iption includes fuel element design, core configuration, sodium coolant system control, safety systems, fuel capsule charger, cover gas system, and shielding. Information of the site comprises population in surrounding areas, meteorological data, geology, and details of the reactor building. The hazmalfunction of the several elements comprising the reactor system. A calculation on the effect of fuel element bowiing appears in an appendix. (auth)
Date: June 1, 1959
Creator: Swickard, E. O.
Partner: UNT Libraries Government Documents Department


Description: Chlorine may be determined in polyurethane by gravimetric or spectrophotometric techniques. The sample is burned in a special combustion tube with two oxygen inlets, the products of combustion are absorbed in a solution containing sodium hydroxide and hydrogen peroxide, and the chlorine is measured either gravimetrically as silver chloride or spectrophotometrically using mercuric thiocyanate and ferric perchlorate. Eighteen determinations of cblorine in known solutions of sodium chloroacetate or perchloric acid gave an average recovery of 98.3% with a standard deviation of 2.8%. (auth)
Date: October 1, 1959
Creator: Henicksman, A.L.; VanKooten, E.H.; Gardner, R.D. & Ashley, W.H.
Partner: UNT Libraries Government Documents Department


Description: A mechanical treatment of atomic recombination reactions is developed for the case in which the reaction is considered to involve an intermediate excited molecule which is stabilized on collision with any third body. An explicit rate calculation is given for the reaction I + I + A yields I/sub 2/ + A Results are compared with those obtained by treating other models of recombination. The validity of the excited intermediate model and the role of electronic degeneracy are discussed. (auth)
Date: November 28, 1958
Creator: Bunker, D.L.
Partner: UNT Libraries Government Documents Department


Description: >The U. S. Navy DT-60 dosimeter was evaluated under field type conditions as to its reproducibility and accuracy of gamma x-ray, thermal and fast neutron and mixed radiation responses. Gamma and x-ray responses from 25 to 600 rads at energies in oxcess of 200 kev were found to be accurate within 20% in 92% of 160 dosimeters examined. Because the DT-60 was found to have no detectable fast neutron response, effort was directed toward exaggerating the thermal neutron response to approximate the total neutron dose from a nuclear detonation and also toward eliminating any neutron response in a mixed neutron- gamma field. This was accomplished by various combinations of lithium, paraffin and cadmium shielding. Data indicate that the DT-60 dosimeter can be modified to approximate more closely doses from specific types of mixed radiations; however, this generally detracts from its value in approximating other types of mixed radiation doses. A paired system of dosimeters, in conjunction with one of the fast neutron dosimetry systems is proposed as being the most satisfactory ar rangement to approximate mixed radiation doses to personnel in the field. (auth)
Date: January 1, 1959
Creator: Ballinger, E.R. & Harris, P.S.
Partner: UNT Libraries Government Documents Department


Description: A general numerical procedure, called the discrete S/sub n/ method, for solving the neutron transport equation is described. The main topics relate to the derivation of suitable difference equations, and to the problem of solving these, while maintaining generality, accuracy, and reasonable computing speed. A few comparisons with other methods are made. (auth)
Date: May 16, 1959
Creator: Carlson, B.
Partner: UNT Libraries Government Documents Department

Abstracts of contributed papers. Sixth international conference on high- energy physics and nuclear structure, Santa Fe and Los Alamos, NM, June 9--14, 1975

Description: Abstracts of contributed papers are assembled under the following headings (number denotes the number of abstracts in the section): pi p and pi d interactions (10); $pi$ nucleus theory (33); intermediate isobar calculations (8); $pi$-nucleus interactions (25); stopping muons (44); exotic atoms and condensed nuclear states (28); nucleus-nucleus interactions (31); nuclear structure and hypernuclei (7); nucleon-nucleon interactions (24); e- and $gamma$- nucleus interactions (29); weak interactions (17); high energy collisions (13); heavy ions (22); instrumentation (8). (SDF)
Date: August 1, 1975
Creator: Mischke, R.; Hargrove, C. & Hoffman, C.
Partner: UNT Libraries Government Documents Department

Proton--proton analyzing power measurements at 16 MeV

Description: Few attempts have been made to measure accurately the proton-proton analyzing powers at low energies. With the advent of polarized particle beams the measurement can now be made with high accuracy. Analyzing powers were measured at nine scattering angles from 10$sup 0$ to 35$sup 0$ in the laboratory system. As a check on systematic errors, analyzing power measurements were also made by scattering protons from $sup 4$He. In the p Vector-p case the measured values are in very good agreement with the phase shift predictions. The p Vector- $sup 4$He measurements, while giving the same form and sign as the phase shift predictions, differ from the predictions by as much as 11 standard deviations. The p Vector-p analyzing powers had a maximum value of -0.0043 +- 0.0004 at 10$sup 0$ (laboratory) and decreased to zero near 25$sup 0$. A new technique to measure analyzing powers without symmetric detectors is explained. This technique preserves the advantages of the symmetric arm method in that current integration, target density, detector efficiencies, and geometry are cancelled from the final expressions. A new scattering chamber, named the Supercube, is described. The Supercube was designed primarily to perform scattering experiments with a polarized beam. It contains both left-right and up-down detectors for use with both spin-1/2 and spin-1 measurements. The Supercube was designed to make analyzing power measurements to an accuracy of 0.001 routine. The Supercube has proved to have low systematic errors and to perform as expected. The systematic errors were found to be equal to or less than 0.0002. (23 figures, 14 tables) (auth)
Date: July 1, 1975
Creator: Lovoi, P.A.
Partner: UNT Libraries Government Documents Department

Preliminary Assessment of a Hot Dry Rock Geothermal Energy Reservoir Formed by Hydraulic Fracturing

Description: If a mass of relatively impermeable hot rock can be hydraulically fractured and if a heat extraction fluid can be circulated through the fracture and recovered, appreciable amounts of energy can be extracted from the rock. The Los Alamos Hot Dry Rock Geothermal Energy Project is designed to investigate and demonstrate this concept. A series of field experiments have been carried out at a site called Fenton Hill, located on the west flank of the Valles Caldera in the Jemez mountains of northern New Mexico. In December, 1974, the first deep borehole, GT-2 was completed to a depth of 2.929 km (9609 ft) in granite, where the temperature was 197ºC (386ºF). A hydraulic fracture was then created near the bottom of this borehole, and a second borehole, EE-1, was drilled to complete the circulation loop, but it failed to intersect the fracture by about 8 m (26 ft). Communication between the wellbores was established by initiating a fracture from EE-1. This paper discusses some aspects of what has been learned about this dual fracture system by subsequent experiments. 4 refs., 4 figs.
Date: December 1, 1976
Creator: Murphy, Hugh D.; Lawton, Robert G.; Tester, Jefferson W.; Potter, Robert M.. Brown, Donald W. & Aamodt, R. Lee
Partner: UNT Libraries Government Documents Department

Geochemical considerations for Hot, Dry Rock Systems

Description: Circulating systems intended to model the P-T conditions found in the natural HDR (Hot Dry Rock) geothermal system at Los Alamos have been built. Experiments with these systems have determined the following parameters for the ''down hole'' reservoir: sample weight loss, circulating solution composition, textural changes in the rock, mineral loss from the rock and effects of chemical additives on rock erosion. The analyses of solutions generated from rock-water interactions in the experimental systems show the extremely dilute nature of the working fluid. These solutions are not brines. Silica scaling in the surface heat exchanger was found to account for the difference between loss of sample rate and analyzed silica in the solution. The weight loss data indicate that there was continuous transport of silica from the ''down hole'' rock to the heat exchanger. Experiments contrasting felsic and mafic rocks in the HDR concept indicate that a reservoir consisting of glass bearing basaltic rock would tend to produce greater scaling problems than systems emplaced in granite. Experimental results suggest that Na{sub 2}CO{sub 3} solutions may provide a means of increasing permeability and thereby increasing the effective heat transfer area of the reservoir. A brief description is given of a small test loop for simulating the flow of a geothermal solution through a heat exchanger. This loop, which is being built, will be used to study the coagulation and precipitation of silica under conditions similar to those expected in the field.
Date: January 1, 1976
Creator: Balagna, J.; Blatz, L.; Charles, R.; Feber, R.; Herrick, C.; Holley, C. et al.
Partner: UNT Libraries Government Documents Department