From joint meeting of the American Nuclear Society and the Atomic Industrial Forum and Nuclear Energy Exhibition; San Francisco, California, USA (11 Nov 1973). The capability of the Closed Loop In-Reactor Assembly (CLIRA) in FFTF to accommodate various postulated events is demonstrated. These events include, in their order of severity, (a) flow coastdown, (b) inlet pipe break, and (c) inlet blockage. All of these accidents are extremely unlikely, nonetheless the consequences of even the most severe flow-transient accident is shown to cause no failure propagation to the reactor, even if a Test Section Meltdown Accident (TSMDA) should result. (auth)

Tasks are reported that were done in assistance to the Atlantic Richfield Hanford Company in the area of process technology and development, and in assistance to the Hanford Plant in the areas of environmental evaluations, radiation protection, and radiation standards and engineering.

From meeting on fission product nuclear data; Bologna, Italy (26 Nov 1973). Applications of fission product nuclear data and data on the fission process in uranium and transuranic elements are required for radiation protection of personnel and the general population for the following situations: to determine the toxicity to exposed individuals from externally located isotopes in the environment or in the fuel cycle; to determine the toxicity caused by deposition of radioactive materials in living systems; to estimate the radiation dose to patients during medical application of injected radioisotopes for diagnostic or therapeutic means; during the use of sealed sources for implantation in living tissue (brachytherapy); during the use of sealed sources at a distance from the patient for therapeutic purposes (teletherapy); to determine the environmental pathways for uncontrolled release of radioactive materials into biosphere; and for personnel protection during the applications of radioisotopes in medicine, biology, agriculture, and industry, including gamma ray and neutron radiography. It was concluded that available nuclear data are adequate for these purposes. (CH)

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From symposium on pore structures and properties of materials; Prague, Czechoslovakia (18 Sep 1973). Several processes are known to produce lattice vacancies in sufficient excess of the thermal equilibrium concentration that they precipitate out as voids. In the case of certain nuclear transmutations, a solid solution of gas is simultaneously produced at a concentration corresponding to a high equilibrium pressure and, if this gas diffuses into the voids, the equilibrium shape for the void is a thin flat cavity. Transmission electron microscopy was used to examine both the nucleation of such voids in neutron- irradiated boron carbide and their transformation to more compact shapes during fission gas release. (auth)

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This report is Part I of a series of three reports which consist of compilations of experimental work on thermal emittances of materials published in the literature through 1972.

This report is Part II of a series of three reports which consists of compilations of experimental work on thermal emittances of materials published in the literature through 1972.

The results of the analysis of {approx} 1000 {nu} events of the type {nu} + N {yields} {mu}{sup -} + hadrons from the NAL dichromatic beam are presented. Distributions in terms of the scaling variables x = Q{sup 2}/2o{nu} and y = {sup E}n/E{sub {nu}} are presented. The x distribution is compared with F{sub 2}{sup ed} (x) from SLAC; the Q{sup 2} distribution is tested for the presence of the propagator term F{sub 2}(x) {yields} F{sub 2}(x)/(1 + Q{sup 2}/2){sup 2}; and the y distributions are fit to the form d{sigma}{sup {nu}N}/dy = 1 + a(1-y){sup 2}. A smaller amount of {bar {nu}} data will also be presented.

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From 6th meeting of International Metallographic Society of America; Los Angeles, California, USA (25 Sep 1973). Preparation and performance of an etchant composed of 10 ml HCl, 10 ml HBr, and 1 ml of HF for fuel and cladding is reported. Results of application of this etchant to irradiated UO/sub 2/-PuO/sub 2/ fuel specimens, stainless steels, and lncoloy 800 are described. (JRD)

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This report describes field geological and geophysical investigations of the Marysville geothermal area, including geological mapping, sample collection, a ground total field magnetic survey, gravity survey, seismic ground noise survey, microearthquake survey, and heat flow study. Although sufficient data are not available, it is likely that a magma chamber is the heat source. A second section, ''Contemporary Seismicity in the Helena, Montana, Region'' examines the coincidence of high heat flow and earthquake swarm activity in this region. (GRA)

Thesis. The optical absorption spectra of Ho/sup 3+/ in the rare earth salt HoF/sub 3/ is studied. Such optical region studies (visible radiation) are easily performed with standard light sources and optical arrangements. Since the energy range of visible light coincides with the excitation energy range for a number of electronic transitions within the rare earth salts, the studies theoretically provide considerable information about rare earth electronic energy levels. Data are compiled for the effects of an applied magnetic field upon the spectra and the effect of sample temperature on the observed absorption spectra. 61 references. (MCW)

The tower is a 180-ft tall steel-frame experimental oil shale processing retort structure with heavy process equipment on various levels. The structural response of the tower to the ground motion from Project Rio Blanco is analyzed and the necessary structural modifications described. (TFD)

An experimental study has shown that the variations in pressure typically experienced in an electron-beam welding chamber can significantly affect the focus of the electron beam, resulting in detectable variations in weld penetration and width. (auth)

Sandia Laboratories expertise in Earth-penetrating projectiles has been applied to problems of geothermal resource research. Field trials of an experimental terradynamics electrode for resistivity surveys have been carried out in cooperation with the Hawaii Institute of Geophysics, and the design of an instrumented magma penetrometer begun. (auth)