The station locations are mapped and the observed apparent resistivity in ohm-meters is tabulated for each location over the frequency range of 7.5 to 18,600 cycles/sec. (WHK)

A technique is described for obtaining short exposure (approximately 8 ns) high resolution photomicrographs of electrically exploded bridges using a pulsed laser for bridge illumination and band-pass filters to eliminate the intense self light. Two cameras are described, one for a small field of view (approximately 1 mm) and one for a relatively large field of view (approximately 20 mm). A carbon disulfide cell and a fiber-optic light guide are used to essentially eliminate speckle, which normally limits the resolution of laser photographs of diffuse surfaces. A series of photomicrographs showing the detailed burst characteristics of both flat and round bridges are shown.

Microwave cavity techniques were used to measure electron density in a spherical, inertial-electrostatic confinement device using six ion guns. The density was roughly proportional to ion current (1 to 17 mA) and decreased somewhat with increasing ion energy (10 to 37 keV). With D$sub 2$ pressure decrease from 10 to 3 mTorr, n/sub e/ decreased faster than linearly and below approximately 3 mTorr decreased linearly with pressure down to the lowest pressure of 0.4 mTorr. At 1 mTorr and 10 mA, measurements (with poor spatial resolution) were consistent with 10$sup 10$ total electrons and a central n/sub e/ of 10$sup 9$ electrons/cm$sup 3$. Neutron flux (at 50 keV) was about one sixth that of Hirsch (J. Appl. Phys. 38, 4522 (1967)). Six- vs. three-gun operation showed a small enhancement of both n/sub e/ and neutron flux that may indicate some particle trapping.

The station locations are mapped and the observed apparent resistivity in ohm-meters is tabulated for each location over the frequency range of 7.5 to 18,600 cycles/sec. (WHK)

A study was made of computer-simulated powder x-ray diffraction data for Ta/sub 22/W/sub 4/O/sub 67/, Ta/sub 2/WO/sub 8/, and Ta/sub 16/W/sub 18/O/sub 94/--the three compounds in the Ta/sub 2/O/sub 5/--WO/sub 3/ system from 27 to 69 mole percent WO/sub 3/. The crystal structures of Ta/sub 2/WO/sub 8/ and one form of Ta/sub 16/W/sub 18/O/sub 94/ (Type B) were deduced from reported data. 8 tables. (auth)

From purpose and scope: The purpose of this investigation is to evaluate, through electrical analog model simulation, the effects of two specific water-management proposals in Dade County. Proposal one is the installation of a secondary control on Snake Creek Canal and proposal two is the forward pumping scheme.

Research programs requiring quality assurance surveillance, certification procedures, and associated record keeping have increased markedly at the Los Alamos Scientific Laboratory. A computer-based system, accessible through time-sharing terminals, performs many routine operations, including continued records updating for equipment calibration, personnel certification, quality assurance procedure listings, and controlled-document distribution lists. The system described has operated successfully for more than a year, resulting in a significant savings in man-hours required to keep quality assurance records.

An injector design for the Reference Mirror Reactor is described which uses negative ions created by charge-exchange in a cesium vapor cell and neutralized by photodetachment. Some of the innovations discussed include a continuously operating cathode for an LBL/LLL ion source, a negative ion beam line with cooled grids, a high voltage accelerator configuration with insulators shielded from the neutron and gamma flux, and cryopanels which continuously cycle between pumping and outgassing modes.

Current interest in geothermal potential of thermal-spring areas in the Appalachians makes all data on thermal springs and wells in these areas valuable. Presented here without interpretive comment are maps showing selected springs and wells and tables of physical and chemical data pertaining to these wells and springs. The chemical tables show compositions of gases (oxygen, nitrogen, argon, methane, carbon dioxide, and helium), isotope contents (tritium, carbon (13), and oxygen (18)), trace and minor element chemical data, and the usual complete chemical data.

Restricted Hartree-Fock calculations for the ground electronic states of BrH/sup +/, KrH/sup +/, and RbH/sup +/ have been carried out using carefully selected nominal atomic basis sets for the heavy atoms, supplemented with an additional orbital designed to allow for a better description of atomic distortion at intermediate internuclear separations. A flexible four-function basis set was used on the hydrogen atom. Molecular optimization was carried out for the heavy-atom distortion orbital and also for the hydrogen 2p orbital. The interatomic potentials obtained for the X /sup 2/PI state of BrH/sup +/ and the X /sup 1/..sigma../sup +/ state of KrH/sup +/ show strong molecular binding (i.e., 3-4 eV) relative to the neutral heavy atoms plus a proton. The RbH/sup +/ X /sup 2/..sigma../sup +/ calculations give a repulsive interatomic potential with dissociation to Rb/sup +/ and a neutral hydrogen atom.

Over the course of OBIS II, 3-14 September, two intrusion cores were observed. One was apparently trapped nearshore over much of the study period, but as time went on, it either dissipated, moved too far shoreward or moved too far laterally along the shelf to be detected by the existing observational grid. The other (later) intrusion was first detected on 5-7 September and was observed to be moving into the Bay from the southeast over the remainder of the study period. Plots of the horizontal temperature and salinity distribution were suggestive of these phenomenon by means of the higher salinity-lower temperature relationship. However, the real confirmation rests in the vertical distributions of sigma-t and chlorophyll presented in conjunction with the Bio and Hydrogrids, and the T--S plot which reveals slope waters on the shelf. The intruded waters were not of low enough temperature to carry high nutrient concentrations onto the shelf for study. However, the general results of this study tend to confirm the view that our basic grid array and methods are compatible with measurement of the processes we initially set out to study. Analyses of these data relative to the current meter data will allow a nearly complete …

This report discusses the current status of liquid-metal fast breeder reactor (LMFBR) development and one of the principal safety issues, a hypothetical core-disruptive accident (HCDA). Bibliographic information on worldwide LMFBRs relative to the development of the breeder reactor as a safe source of nuclear power is presented for the period 1970 through 1972. The bibliography consists of approximately 1620 abstracts covering early research and development and operating experiences leading up to the present design practices that are necessary for the licensing of breeder reactors. Key-word, author, and permuted-title indexes are included for completeness.

Information is presented concerning: review of the status of general design efforts in the areas of aerodynamics, structures, systems analysis, and testing; summary of preliminary design details of the proposed 17-m turbine/60-kW generator system for power grid application; and structural analysis and operational test results for the existing 5-m turbine.

The linear thermal expansion of stoichiometric /sup 238/PuO/sub 2/ was measured over the range 25 to 1600/sup 0/. The value of ..delta..L/L/sub 0/ per degree C, calculated from the data, is ..delta..L/L/sub 0/ = -2.249 x 10/sup -4/ + 9.020 x 10/sup -6/T - 1.130 x 10/sup -9/T/sup 2/ + 1.525 x 10/sup -12/T/sup 3/.

A computer program for the calculation of gas-liquid equilibria for the system CO/sub 2/-N/sub 2/-CO-O/sub 2/-Xe-Kr is presented. The thermodynamic model has been developed as part of a three-column, multicomponent, multistage model used for the study of the KALC (Krypton Absorption in Liquid CO/sub 2/) process.

Essential features of the descriptive chemistry of americium are reviewed. Chapter titles are: discovery, atomic and nuclear properties, collateral reading, production and uses, chemistry in aqueous solution, metal, alloys, and compounds, and, recovery, separation, purification. Author and subject indexes are included. (JCB)

The status of nuclear research at Lawrence Livermore Laboratory is presented in the following areas: standards; neutron data applications; data compilation program; basic physics; and facilities. Three papers with significant information are listed separately by title. (RWR)

Magnetization was measured between 4 and 290/sup 0/K in fields up to 70 kOe on liquid-quenched Gd/sub 80/Au/sub 20/ amorphous alloys. The Curie temperature and critical exponents ..beta.., ..gamma.. and delta are found to be 149.45/sup 0/K, 0.439, 1.294 and 3.948 respectively. These values are compared with the Heisenberg and molecular field values. The data are fitted to an equation of state previously derived for second order phase transition in fluid systems. The results illustrate clearly a second order phase transition in the amorphous state. A discussion in terms of the Heisenberg model is presented. The effective magnetic moment in the paramagnetic state has a value of 9.37 ..mu../sub B/ per gadolinium atom. The saturation moment extrapolated to 0/sup 0/K is 7.0 ..mu../sub B/ per gadolinium atom. The low temperature saturation magnetization observes the T/sup /sup 3///sub 2// law from 0.13 T/sub c/ to 0.80 T/sub c/. The effective exchange integrals J/sub n/ determined from the Rushbrooke--Wood formula and spin-wave theory are found to be 2.28 and 1.34/sup 0/K respectively. The differences in J/sub n/ and that between the effective moment and saturation moment are attributed to the nearest-neighbor antiferromagnetic couplings below T/sub c/. Possible effects of structural disorder on …

The results of a survey of solar energy system applications of air conditioning are summarized. Techniques discussed are both solar powered (absorption cycle and the heat engine/ Rankine cycle) and solar related (heat pump). Brief descriptions of the physical implications of various air conditioning techniques, discussions of status, proposed technological improvements, methods of utilization and simulation models are presented, along with an extensive bibliography of related literature.

Nineteen parameters representing landscape, plant, and soil characteristics were examined for their influence on midday plant water relations, daily fluxes and monthly water balance components predicted by a soil-plant-water relations model having hourly resolution. A standard set of parameters was chosen to represent a hardwood forest on ridge top soil in the Oak Ridge, Tennessee, area during a representative summer month (July). Each parameter was varied through a range with all other parameters held at the standard value. The results of the study showed that the model was sensitive to nine plant parameters in noon, daily and monthly results. The ten other parameters had partial or no influence on the simulations. Two leaf characteristics and two landscape properties cause the model to be sensitive in midday values but less sensitive in monthly results due to the negative feedback aspects of the model. Five parameters had almost no influence on the model results in the case examined. The canopy interception parameter had almost no influence on the model results on sunny days, but was a significant component of the monthly water balance. The study highlighted the importance of the root and stem resistances to water flow in influencing plant water status …

Some estimates of the shape of C/sub s/ ion and C/sub s/ atom interaction potentials suggest that the C/sup +//sub s/ + C/sup +//sub s/ charge transfer cross section may be less than 10/sup -15/ cm/sup 2/.

In more than 17 years of studying underground nuclear explosions, LLL has developed containment procedures that include a stemming plan. Stemming plans can be divided into either layered or continuous forms. There are marked differences between standards for these forms. The materials used in the continuous plan must meet more stringent specifications; as a consequence, they are more expensive. Both plans have been successful since the Baneberry Event. Both plans must meet the following requirements: provide a plug sufficient to match the overburden density of earth; contain radioactive gases at the lowest possible depth; minimize the generation of noncondensable gases (such as CO/sub 2/); minimize gas flow rates during the early post-detonation stages when cavity pressure is high; and be compatible with the experiment and its diagnostics. LLL experience in developing containment procedures is reviewed, and the reasons for the adoption of LLL's continuous stemming plan are reported. (LCL)

Data are presented from a preliminary analysis of chemical/physical data obtained during three current meter servicing cruises in Onslow Bay off the coast of Georgia, in August, October, and December 1975 aboard the R/V ADVANCE II. These cruises were made as part of an ERDA sponsored study investigating the shelf processes effecting the distribution of nutrients in the South Atlantic Bight. The objective of these cruises was to collect temperature and chemical data to correlate with the data recorded by current meters and thermographs which had already been deployed or which were about to be deployed at two locations in the study area. No attempt will be made at this time however to correlate the data presented to these related records.

The report summarizes available information on the effects of various power plant cooling systems on the atmosphere. While evaporative cooling systems sharply reduce the biological impacts of thermal discharges in water bodies, they create (at least, for heat-release rates comparable to those of two-unit nuclear generating stations) atmospheric changes. For an isolated site such as required for a nuclear power plant, these changes are rather small and local, and usually environmentally acceptable. However, one cannot say with certainty that these effects will remain small as the number of reactors on a given site increases. There must exist a critical heat load for a specific site which, if exceeded, can create its own weather patterns, and thus create inadvertent weather changes such as rain and snow, severe thunderstorms, and tornadoes. Because proven mathematical models are not available, it is not now possible to forecast precisely the extent and frequency of the atmospheric effects of a particular heat-dissipation system at a particular site. Field research on many aspects of cooling system operation is needed in order to document and quantify the actual atmospheric changes caused by a given cooling system and to provide the data needed to develop and verify mathematical and …