Beryllium-copper alloys should be considered toxic materials and proper controls must be used when they are machined, heated, or otherwise fabricated. Air samples should be taken for each type of fabrication to determine the worker's exposure and the effectiveness of the controls in use. It has been shown that aerosols containing beryllium are generated during the four methods of fabrication tested, and that these aerosols can be reduced through local exhaust to undetectable levels. Considering the acute, chronic and possibly carcinogenic effects of exposure to beryllium, effective controls should be required because they are feasible both technologically and economically. The health hazards and control measures are reviewed.

The formation of negative ions by hydrogen collisions on cesium-coated surfaces is discussed in the limiting cases where the resident cesium is either in the purely ionic state or in the purely atomic state. The survival fraction for negative ions moving away from a metal surface is calculated using a method employing complex eigenvalues. The fraction of surviving ions is found to be larger than calculated by previous workers. The secondary emission coefficient for negative ion production by incident atoms with energies of ten to one hundred electron volts is estimated to be in the range thirty to forty percent.

This assessment estimates the impact of future national energy development on water resources. Energy development would include various types of electric power plants, production of synthetic fuels, coal and uranium mining, oil and gas extraction, and other conversion processes. The Energy Analysis Program at LBL has conducted this analysis for its assigned region, the states of California and Nevada. The objective of this study is to determine water requirements of energy technologies and their implications, with emphasis on emerging technologies for aggregated subareas (ASA) in California. The first phase of this study provides energy-supply projections and corresponding demands for water resources as perceived by regional and state groups responsible for or involved in energy planning in California and Nevada. The second phase of the study is designed to calculate the water requirements for the levels of energy development in California as specified by a Department of Energy scenario for the year 2000 and by utility projections as reported by the Federal Power Commission for 1985. The implications of these water requirements on competing water users are explored briefly. 24 references.

Energy-averaged total cross sections of elemental vanadium were measured from 1.5 to 5.5 MeV. Differential elastic and inelastic neutron scattering cross sections were measured from 1.8 to 4.0 MeV. Neutrons corresponding to the excitation of states in vanadium at 321 +- 10, 938 +- 15, 1603 +- 19, 1811 +- 21, 2409 +- 27, approximately 2500, 2706 +- 30 and 2773 +- 30 keV were observed. From these experimental results an energy-average model was deduced suitable for extrapolating and interpolating the measured values. These results and those reported elsewhere were used to construct a comprehensive Evaluated Neutronic File in the ENDF format with particular attention to higher-energy processes having an impact on FBR, CTR, dosimetry and gas production applications.

Report providing information about the water resources of the Munabo Valley in southeastern Puerto Rico, including the principal source of water, chemical composition, hydraulic conductivities, average transmissivity, and suggestions for water supplementation.

A model of the chemical kinetics occurring in an iodine laser amplifier is presented and used to calculate the degree to which the starting material is consumed as a result of laser operation. The cost of purchasing new starting material is estimated and shown to be prohibitive. A scheme for regenerating the starting material from the species present in the amplifier after lasing is proposed. It is shown that the estimated efficiency of this chemical regeneration process is appreciably higher than the projected optimum efficiency of the pumping process.

Digital frequency analysis techniques are used to determine the frequency content of a set of time-dependent data and to improve the quality of the data by eliminating undesired frequencies. This report provides an introduction to the use of these techniques with nonrandom data. Included are guidelines for acquisition and processing of data, calculation and interpretation of digital spectral estimates, and application of digital filters. The techniques are demonstrated by use of three examples derived from wind-tunnel data: frequency analysis of 3-DOF angular motion data, elimination of extraneous frequencies in dynamic stability data, and determination of control surface forcing function frequencies. 14 figures.

This report summarizes the results of a study of azide decomposition for possible application in a visible chemical laser. Task 1 of the subject contract involved thorough review of the chemical literature pertaining to azide decomposition. Covalently bonded azides decompose directly into an electronically excited nitrene (RN) and ground-state molecular nitrogen. Ionic azides decompose to metal atoms and azide radicals. The azide radicals subsequently recombine to form electronically excited nitrogen molecules. Task 2, the experimental phase of this program, involved the study of azide-radical reactions. A flow reactor was built in which large concentrations (up to 10/sup 13/ molec cm/sup -3/) of N/sub 3/ could be produced from the thermal decomposition of NaN/sub 3/. The kinetics of and chemiluminescent products from several reactions of N/sub 3/ have been studied, and a method for obtaining absolute concentrations of N/sub 3/ is described. The potential utility of azide decomposition for the production of excited electronic states suitable for a laser device and further areas of research germane to this goal are discussed briefly.

This report is about Civilian Applications of Particle-Beam-Initiated Inertial Confinement Fusion Technology. It also reviews the status of the particle beam fusion technology development program and identifies several potential civilian applications for this technology.