The two-phase flow system is analyzed as it develops and changes in the well. The product of the study will be a calculational technique to allow the design of geothermal wells in two-phase flow. The overall approach to the project is summarized, and the nature of the two-phase flow problem is discussed. The various elements of the program are presented. (MHR)

Permeation of hydrogen through iron, stainless steel, and niobium was studied. 5 fig. (DLC)

The Environmental Standards Group at Mound Laboratory uses ''cold'' DOP generators to produce background aerosol concentration for testing HEPA filters in clean-room operations. Two simple, portable, air-operated aerosol generators were built and tested to determine their performance. The results show the particle size distribution is in the 0.3 to 0.8 ..mu..m range and that /sup 1///sub 4/ or /sup 3///sub 8/ in. i.d. tubing to the nozzles should be used.

An attempt is made to discuss systematics of new particles and their spectroscopy in a simple manner. The main emphasis is on charm and SU(4), weak decays of charmed mesons, hadronic masses, and charmonium. (SDF)

The focus lens design for the 20-beam SHIVA laser fusion facility involves considerations of uniform and normal pellet illumination. The resulting requirements dictate tailored beam intensity profiles and vacuum-loaded thin lenses.

An investigation was made on a hydrogen getter material (DPPE) to determine its radiation stability. Such material has potential for nuclear industry applications. The material is composed of 75 percent of an unsaturated organic compound (1,6-diphenoxy-2,4-hexadiyne) and 25 percent catalyst (5 percent palladium on calcium carbonate). The radiation stability of this material and of the hydrogenated product was determined by exposing them to gamma radiation in air and vacuum and analyzing for radiolysis products and hydrogen capacity. The major products formed were phenol and carbon dioxide. Numerous solid compounds were also formed in much smaller yields. Product yields were much larger in air than in vacuum. Hydrogen uptake curves showed that the hydrogen capacity decreased appreciably after an absorbed dose of about 10/sup 8/ rads, and that irradiation is more detrimental in air than in vacuum. (For SI (metric) use: rads have been replaced by grays (Gy) and 1 gray = 1 joule per kilogram, and 10/sup 8/ rads = 1 megajoule per kilogram.)

A preliminary feasibility study was initiated to determine if laser-induced fluorescence might reveal molecular changes due to uniaxial stresses on Kevlar, an aromatic polyamide fiber. The fluorescence spectrum, with a peak at 490 nm (excited by 290 nm), did not shift with stress, but the fluorescence intensity generally increased with stress. The magnitude of the increase was attenuated by epoxy resin. Implications and applications of the results are discussed. (DLC)

None

This report presents (1) values of the parameters needed in the estimation of internal radiation doses from inhalation of radioactive aerosols resulting from hypothetical liquid metal fast breeder reactor accidents, (2) the values of the time integrated organ deposited radioactivity per unit of radioactivity inhaled (..mu..Ci-days/Ci inhaled) based on a metabolic model that incorporates the respiratory tract model adopted by the International Commission on Radiological Protection Task Group on Lung Dynamics and (3) the values of the dose conversion factors (F-factors) in rem per curie inhaled for various important LMFBR radionuclides.

Various factors that can affect thermal blooming in stagnation zones are examined, including stagnation-zone motion, longitudinal air motion in the neighborhood of the stagnation zone, and the effects of scenario noncoplanarity. Of these effects, only the last offers any reasonable hope of reducing the strong thermal blooming that normally accompanies stagnation zones; in particular, noncoplanarity should benefit multipulse more than cw beams. The methods of treating nonhorizontal winds hydrodynamically for cw and multipulse steady-state sources are discussed. Pulse ''self-blooming'' in the triangular pulse approximation is discussed in the context of both single and multipulse propagation. It is shown that self-blooming and multipulse blooming cannot be treated independently.