The Geothermal Steam Act and the implementing Regulations printed here governed most aspects of the leasing of Federal lands for geothermal exploration and development for many years. They are of great historical interest. Interesting details include: limits on leased acreage per person or firm, distinctions between competitive and noncompetitive leases, rules for bonus auctions, rents, and production royalties, diligence requirements, and distribution of royalties between the Government and the states. Note that most of what was laid out here prevailed until relatively large revisions in the omnibus Energy Bill of 2005. (DJE 2005)

To supply the heat input required by space-borne Vuilleumier refrigerators, a possible design for a reliable Pu-238 radioisotope heat source, based on state-of-the-art technology, is described. The isotope heat source would replace electrical heaters powered by solar panels and batteries, and would be adaptable to existing VM refrigerators without redesign. The heat source contains all necessary safety features, and also a simple thermal control system to permit refrigerator shut-down for indefinite duration. A system for thermal interfacing with the spacecraft, the booster, and ground support is also described. The isotope heaters are compared with solar-electric heaters for the same application, and found to result in very significant weight and size savings.

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The modeling of convective storm scavenging processes is going forward on two distinct fronts. The first of these relates to the microphysical processes, particularly to the study of their response to micro-dynamical components of the convective circulation. It is found that the droplet size spectra generated are responsive to variations of vertical velocity due to turbulence within the cloud and to humidity variations due to entrainment processes. Both sets of variations give responses that differ for different amplitudes and frequencies, i.e., rapid, small-amplitude eddies appear to enhance small-droplet development, whereas slow, large-amplitude oscillations tend to enhance large-droplet development. An allied study of the assumptions used in the microphysical equations is also being made. The second modeling effort is addressed to the problem of three-dimensional representation of convective dynamics. Equations are presented, and some of the problems under attack are discussed. (auth)

A numerical technique based on the method of nearcharacteristics is considered for solving propagation of fluid-hammer waves in a two-dimensional geometry. The solution is constructed by relating flow conditions by compatibility equations along lines called nearcharacteristics. Three choices are considered in the numerical scheme that are accurate within an error of the order of magnitude of the time step. Since the nearcharacteristics lie in the coordinate planes, the technique provides an efficient method requiring only simple interpolations in the initial plane. On the other hand, the nearcharacteristics fall outside the characteristics cone. Thus the solution procedure directly refers to conditions outside the true domain of dependence. The effect of this is studied through numerical calculation of a simple example problem and comparison with results obtained by a bicharacteristic method. Comparison is also made with existing analytical solutions and experiments. Furthermore, the three solution schemes considered are examined for numerical stability by the vonNeumann test. Two of the schemes were found to be unstable; the third yielded a stability criterion equivalent to that of the bicharacteristic formulation. The stability-analysis results were confirmed by numerical experimentation. (auth)

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The ENERGY 1 code is a semi-empirical method for predicting temperature distributions in wire wrapped rod bundles of a LMFBR. A comparison of ENERGY 1 and MISTRAL 2 is presented. The predictions of ENERGY 1 for special sets of data taken under geometric conditions at the limits of the code are analyzed. 14 references. (auth)

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This state-of-the-art review identifies and discusses existing methods of flow-induced vibration analysis applicable to steam generators, their limitations, and base-technology needs. Also included are discussions of five different LMFBR steam-generator configurations and important design considerations, failure experiences, possible flow-induced excitation mechanisms, vibration testing, and available methods of vibration analysis. The objectives are to aid LMFBR steam-generator designers in making the best possible evaluation of potential vibration in steam-generator internals, and to provide the basis for development of design guidelines to avoid detrimental flow-induced vibration. (auth)

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This bibliography includes Los Alamos Scientific Laboratory reports, papers released as non-Los Alamos reports, journal articles, books, chapters of books, conference papers (whether published separately or as part of conference proceedings issued as books or reports), papers published in congressional hearings, theses, and U. S. patents. Publications by LASL authors which are not records of Laboratory-sponsored work are included when the Library becomes aware of them. The entries are arranged in sections by broad subject categories; within each section they are alphabetical by title. The following subject categories are included: aerospace studies; analytical technology; astrophysics; atomic and molecular physics, equation of state, opacity; biology and medicine; chemical dynamics and kinetics; chemistry; cryogenics; crystallography; CTR and plasma studies; earth science and engineering; energy (non-nuclear); engineering and equipment; EPR, ESR, NMR studies; explosives and detonations; fission physics; health and safety; hydrodynamics and radiation transport; instruments; lasers; mathematics and computers; medium-energy physics; metallurgy and ceramics technology; neutronic and criticality studies; nuclear physics; nuclear safeguards; physics; reactor technology; solid state science; and miscellaneous (including Project Rover). Author, numerical and KWIC indexes are included. (RWR)

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The $sup 26$Mg($sup 7$Li,$sup 8$B)$sup 25$Ne reaction at 78.9 MeV was used to measure the mass-excess of $sup 25$Ne (-2.18 +- 0.10 MeV) and several low- lying excited states. Mass-excesses for $sup 43$Ar (-31.98 +- 0.07 MeV), $sup 45$Ar (-29.727 +- 0.06 MeV), and $sup 46$Ar (-29.732 +- 0.07 MeV) were determined from the $sup 48$Ca($alpha$,$sup 9$,$sup 7$Be)$sup 43$,$sup 45$Ar reactions at 77.7 MeV and the $sup 48$Ca($sup 6$Li,$sup 8$B)$sup 46$Ar reaction at 80.1 MeV. Several excited states of $sup 43$Ar and $sup 45$Ar were observed. These and the excited states of $sup 25$Ne are compared with theoretical predictions. Ground state differential cross sections are given for all reactions, ranging from 0.1 to 1 $mu$b/sr at forward angles. Upper limits of about 1 to 25 nb/sr were determined for the ground state cross sections of the reactions $sup 48$Ca($alpha$,$sup 8$,$sup 10$,$sup 11$B)$sup 44$,$sup 42$,$sup 41$Cl and $sup 48$Ca($alpha$,$sup 10$-$sup 13$C)$sup 42$-$sup 39$S at 110 MeV. Recoil coincidence techniques were used to measure the mass-excess of the particle- unbound nucleus $sup 10$Li(33.83 +- 0.25 MeV) by the $sup 9$Be($sup 9$Be,$sup 8$B)$sup 10$Li reaction at 121 MeV; the ground state cross section was 30 nb/sr. The $sup 14$C($sup 9$Be,$sup 8$B)$sup 15$B reaction …

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This standard establishes the procedure for determining the homogeneity of plutonium oxide-uranium oxide (PuO$sub 2$-UO$sub 2$) fuel pellets by alpha- autoradiography. (auth)

Possible uses of pattern recognition techniques for solving complex scientific problems are discussed, and previous experience in using the pattern recognition computer code RECOG to solve materials problems, specifically in determining the mechanical properties of high explosives, is described. (LCL)

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