Mass spectrographic methods have served well in the past to analyze gaseous mixtures of the hydrogen isotopes. Alternate methods of analyses are reviewed which offer wider ranges and variety of isotopic determinations. This report describes possible improvements of the mass spectrographic determinations, gas chromatography, anti-Stokes Raman spectroscopy, microwave-induced optical emission spectroscopy, and methods of measuring tritium using radiation detection devices. Precision, accuracy, limitations, and costs are included for some of the methods mentioned. Costs range from $70,000 for the anti-Stokes Raman spectroscopy equipment, which can determine hydrogen isotopes but not helium, to less than $10,000 for the gas chromatographic equipment, which can determine hydrogen isotopes and helium with precision and accuracy comparable to those of the mass spectrometer.

This report is about the importance of U.S agriculture productivity to the global community.

A large valve that isolates a neutral beam source from a working fusion reactor is described. The design and construction techniques for the bellows valve are given. (MOW)

The objective of this research program is to demonstrate the feasibility for the high volume low cost production of silane (SiH/sub 4/), as an intermediate for solar or semi-conductor grade silicon. The goal of the program is to demonstrate the feasibility for achieving a net production cost of less than $5.00 per kilogram of silane through the operation of a 10 pound/day scale pilot plant. The process to be investigated is based on the catalytic disproportionation of chlorosilanes using a tertiary amine ion exchange resin followed by fractional distillation to purify the silane product. (WDM)

A laboratory version of a process to clean contaminated deuterated polyethylene (CD/sub 2/) was modified slightly and scaled up to produce 2 lb of clean, reusable CD/sub 2/ polymer. A complete cycle of the process is: (1) Melt the CD/sub 2/ polymer at 30 vol percent in xylene at 105 to 110/sup 0/C. (2) Pressure filter the hot solution at 103 to 138 kPa (15 to 20 psi). (3) Cool the solution to precipitate the polymer and separate it from the liquor. (4) Vacuum dry the precipitate at about 266 Pa and 37/sup 0/C.

The current status of digital computing technology and its applications are briefly reviewed. A surprise-free (invention-precluding) scenario for predicting the advance of this technology and its applications for the next two decades is developed, and employed to set lower bounds on the performance of digital computing systems and their potential applications. Progress-pacing features are identified, and are seen to be primarily of hardware origin in the near term, and due to software limitations in the longer term. 5 figures, 2 tables.

The engineering design of the shock and vibration fixtures has been completed. Detail drawings of the individual components are now in progress, and fabrication of the fixtures is expected to begin in April 1976.

Results are presented of a development program aimed at making a full-scale, all-beryllium frustrum by riveted assembly methods. Included are descriptions of the sheet-metal fabrication practices and assembly plans. Results of extensive mechanical testing of both ingot- and powder-source beryllium products that are presented include tensile, notch-tensile, bearing, and shear tests. Although the full-size structure has not been built, examples are given of several conical and cylindrical structures that were made. The largest of these is a 20-in. diameter, 15-in. long cylinder that was roll-formed from one 0.050-in. thick ingot sheet and assembled with 60 countersunk rivets. Tensile testing of riveted flat coupons is also reported as is bulge testing of riveted cylindrical shells. A cost comparison of riveted deep-drawn and powder-source cylinders is made. Results show that when strength and dimensional tolerance requirements are not severe, a riveted assembly approach is warranted. 33 figures, 8 tables. (auth)

From objective and plan: The airborne data gathered were reduced using ground-based computer facilities to give the basic uranium, thorium and potassium equivalent gamma radiation intensities, ratios of these intensities, aircraft altitude above the earth's surface, total gamma ray and earth's magnetic field intensity, correlated as a function of geologic units indicated from available geologic maps. Results of analyses of these field data are presented as profile plots of the gamma radiation and earth's magnetic field.

From objective and plan: The airborne data gathered were reduced using ground-based computer facilities to give the basic uranium, thorium and potassium equivalent gamma radiation intensities, ratios of these intensities, aircraft altitude above the earth's surface, total gamma ray and earth's magnetic field intensity, correlated as a function of geologic units indicated from available geologic maps. Results of analyses of these field data are presented as profile plots of the gamma radiation and earth's magnetic field.

From objective and plan: The airborne data gathered were reduced using ground-based computer facilities to give the basic uranium, thorium and potassium equivalent gamma radiation intensities, ratios of these intensities, aircraft altitude above the earth's surface, total gamma ray and earth's magnetic field intensity, correlated as a function of geologic units indicated from available geologic maps. Results of analyses of these field data are presented as profile plots of the gamma radiation and earth's magnetic field.

This report Provides Capsule summaries of the bills Resolutions and amendments in a few areas.

This report discusses the authorization and spending program on career education. It also points out public laws in career education and pending legislation, 94th congress.

Tensile tests were conducted on eight heats of randomly selected, mill-annealed type 316 stainless steel and seven heats of mill-annealed type 304 stainless steel at 24, 93, 204, and 316/sup 0/C to establish the effects of heat-to-heat variations on total strain (to 5 percent) at discrete stress levels. Factors of difference were established between maximum and average strain (corresponding to minimum and nominal yield strength material respectively) for regulatory analysis applications. Limited tests were conducted to show the effects of product form and material condition on total strain. 13 tables, 25 fig. (auth)

It is well established that damage introduced at the surface of beryllium during machining operations can lower its mechanical properties. Tensile tests were conducted to illustrate this on beryllium presently being used for parts in the W79 program and similar to the new powder-processed beryllium specified for production (tentative specification MEL 76-001319). The objective of this study is to quantitatively illuminate the importance of controlling machining damage in this particular grade of powder-processed beryllium.

Premature failures during proof testing of pressurized-gas-metal-arc (PGMA) welded beryllium assemblies were investigated. The failures were almost entirely within the beryllium (a forming grade, similar to HP-10 or S-240), close to and parallel to the weld interface. The aluminum-silicon weld filler metal deposit was not centered in the weld groove in the failed assemblies, and failure occurred on the side of the weld opposite the bias in the weld deposit. Tensile tests of welded samples demonstrated that the failures were unrelated to residual machining damage from cutting the weld groove, and indicated small lack-of-fusion areas near the weld start to be the most likely origin of the failures. Acoustic emission was monitored during tensile tests of the welds. The majority of acoustic emission was probably from crack propagation through the weld filler metal. Tensile bars cut from the region of the weld start behaved differently; they failed at lower loads and exhibited an acoustic emission behavior believed to be from cracking in the weld metal-beryllium interface. Improvement in the quality of these and similar beryllium welds can therefore most likely be made by centering the weld deposit and reducing the size of the weld start defect. 21 fig.

The objective of this program, Part 2 of the Silicon Materials Task, is to develop and define purity requirements for solar cell grade (SG) silicon material by evaluating the effects of specific impurities and impurity levels on the performance of silicon solar cells. The basic approach of the program is to establish, as unambiguously as possible, what concentrations of the impurities commonly found in silicon starting material (metallurgical grade silicon) can be tolerated in silicon crystals produced by both the standard Czochralski and the dendritic-web sheet (rapid growth) methods without degrading solar cell performance. The program is on schedule in all elements. Specifically the growth, evaluation, solar cell fabrication and testing are completed for the baseline boron-doped Czochralski material. Cell efficiencies are in the 11 to 13 percent range (AM1). The growth of six first generation Czochralski crystals (boron doping plus Cr, Mn, Cu, Ni, V, and Ti) is completed. Solar cell measurements on four of the first doubly-doped ingots indicate that Cr and Mn seriously degrade cell performance at the 10/sup 15/ cm/sup -3/ doping level while neither Ni nor Cu produce any significant reduction in cell efficiency. The results for Ni can be rationalized on the basis of …

The results of a study to evaluate the use of the General Atomic high-temperature gas-cooled reactor as a heat source for petroleum refining and other petrochemical processes requiring process temperatures up to 1050/sup 0/F are presented. The specific objective was to investigate methods of supplying and transporting steam and process heat from the primary reactor coolant to the refinery process heat exchangers. An evaluation of potential heat transfer fluids for transporting the heat from the reactor site to the refinery site was made and a promising fluid was selected for further investigation. A conceptual design of a secondary helium heat transfer loop with a heat exchanger located inside the prestressed concrete reactor vessel was established. Methods for providing minimum acceptable process heat and steam during reactor refueling and shutdown were investigated. A safety evaluation considering the possibility and consequences of radioactive contamination and petroleum contamination of the heat transfer fluid was conducted. The necessary modifications to the nuclear reactor system were identified and conceptual designs and economic estimates for these modifications were made.

References for the commonly cited technical papers in the area of computer protection are given. Great care is taken to exclude papers with no technical content or merit. For the purposes of this bibliography, computer protection is broadly defined to encompass all facets of the protection problem. The papers cover, but are not limited to, the topics of protection features in operating systems (e.g., MULTICS and HYDRA), hardware implementations of protection facilities (e.g., Honeywell 6180, System 250, BCC 5000, B6500), data base protection controls, confinement and protection models. Since computer protection is related to many other areas in computer science and electrical engineering, a bibliography of related areas is included after the protection bibliography. These sections also include articles of general interest in the named areas which are not necessarily related to protection.

This report outlines the conflict concerning free press during criminal trials.

The high-pressure liquid-phase flow microreactor is a unique reactor for obtaining quantitative kinetic data for catalytic hydrodesulfurization and hydrodenitrogenation. The hydrodesulfurization of dibenzothiophene involves formation of biphenyl as a primary reaction product without hydrogenation of the aromatic rings. The catalytic hydrodenitrogenation of quinoline involves rapid hydrogenation of the nitrogen-containing ring followed by cracking of the ring to produce an aniline which is slowly hydrodenitrogenated. The hydrodenitrogenation reactions follow first-order kinetics. The order of activity of five commercial hydrotreating catalysts for quinoline hydrodenitrogenation is (Ni--Mo/Al/sub 2/O/sub 3/) > (Ni--W/Al/sub 2/O/sub 3/) > (Ni--W/Al/sub 2/O/sub 3/--SiO/sub 2/) > (Co--Mo/Al/sub 2/O/sub 3/).

This report is about the The Federal Election Commission Congressional Alternatives Following Buckley V . Valeo.

Organic ion exchange resins were evaluated for /sup 238/Pu(IV), /sup 238/Pu(VI), and /sup 233/U(VI) removal from water. The capacity of the resins and equilibrium coefficients (Kd) were compared with each other and to bone char--an inorganic adsorbent consisting of hydroxyapatite (HAP) for which data is available. Bone char gave the best results for the removal of /sup 238/Pu(IV), Amberlite XE279 (one of the new macroporous resins) gave the best results for /sup 238/Pu(VI), and another macroporous resin, Dowex-MSA-1, gave good results for /sup 233/U(VI). Kd values were shown to be a function of pH.

None