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Comparison of ICEPEL predictions with single elbow flexible piping system experiment
The ICEPEL Code for coupled hydrodynamic-structural response analysis of piping systems is used to analyze an experiment on the response of flexible piping systems to internal pressure pulses. The piping system consisted of two flexible Nickel-200 pipes connected in series through a 90/sup 0/ thick-walled stainless steel elbow. A tailored pressure pulse generated by a calibrated pulse gun is stabilized in a long thick-walled stainless steel pipe leading to the flexible piping system which ended with a heavy blind flange. The analytical results of pressure and circumferential strain histories are discussed and compared against the experimental data obtained by Stanford Research Institute.
Date:
January 1, 1978
Creator:
A-Moneim, M.T. & Chang, Y.W.
Object Type:
Article
System:
The UNT Digital Library
Anomalous fracture-extension pressure in granitic rocks
Fracture-extension pressures appreciably higher than the least principal earth-stress were observed in hydraulic fractures formed in a pair of 3 km (9600 ft) deep boreholes drilled near the Valles Caldera in northern New Mexico. Pressurization of open wellbores in rock containing preexisting fractures may open these fractures, instead of creating new fractures at right angles to the least principal stress. The pressure necessary to flow into these fractures may be appreciably higher than the least principal stress. Upon sand-propping one such pre-existing fracture, a lower fracture extension pressure was observed. A second fracture in a parallel well-bore 92 m (300 ft) away, at the same depth of 2 km (6500 ft) exhibited the lower fracture extension pressure without propping, but with about 90/sup 0/ difference in fracture direction. Fractures created through perforations at a depth of 3 km (9600 ft) not only exhibited breakdown pressures upon initial pressurization, but sometimes even higher ''breakdown'' pressures upon repressurization. These phenomena may be of interest in the interpretation of earth stress measurements made by hydraulic fracturing.
Date:
January 1, 1978
Creator:
Aamodt, R. L. & Potter, R. M.
Object Type:
Article
System:
The UNT Digital Library
Cermets for high level waste containment
Cermet materials are currently under investigation as an alternate for the primary containment of high level wastes. The cermet in this study is an iron--nickel base metal matrix containing uniformly dispersed, micron-size fission product oxides, aluminosilicates, and titanates. Cermets possess high thermal conductivity, and typical waste loading of 70 wt % with volume reduction factors of 2 to 200 and low processing volatility losses have been realized. Preliminary leach studies indicate a leach resistance comparable to other candidate waste forms; however, more quantitative data are required. Actual waste studies have begun on NFS Acid Thorex, SRP dried sludge and fresh, unneutralized SRP process wastes.
Date:
January 1, 1978
Creator:
Aaron, W. S.; Quinby, T. C. & Kobisk, E. H.
Object Type:
Article
System:
The UNT Digital Library
TCT hybrid preconceptual blanket design studies
The conceptual design of a tokamak fusion-fission (hybrid) reactor, which produces electric power and fissile material, has been performed in a cooperative effort between Princeton's Plasma Physics Laboratory (PPPL) and Battelle's Pacific Northwest Laboratories (PNL). PPPL, who had overall project lead responsibility, designed the fusion driver system. Its core consists of a tokamak plasma maintained in the two-component torus (TCT) mode by both D and T beams and having a single null poloidal divertor. The blanket concept selected by PPPL consists of a neutron multiplying converter region, containing natural Uranium Molybdenum (U-Mo) slugs followed by a fuel burning blanket region of molten salt containing PuF/sub 3/. PNL analyzed this concept to determine its structural, thermal and hydraulic performance characteristics. An adequate first wall cooling method was determined, utilizing low pressure water in a double wall design. A conceptual layout of the converter region tubes was performed, providing adequate helium cooling and the desired movement of U-Mo slugs. A thermal hydraulic analysis of the power-producing blanket regions indicated that either more helium coolant tubes are needed or the salt must be circulated to obtain adequate heat removal capability.
Date:
January 1, 1978
Creator:
Aase, D. T.; Bampton, M. C. C.; Doherty, T. J.; Leonard, B. R.; McCann, R. A.; Newman, D. F. et al.
Object Type:
Report
System:
The UNT Digital Library
Quantification of erythroid and granulocytic precursor cells in plateletpheresis residues
Mononuclear cell fractions of human blood and plateletpheresis residues were compared for their content of hemopoietic precursor cells. Erythroid burst-forming units (BFU-E) averaged 560 +- 130 per ml of blood and granulocyte--monocyte colony forming units (CFU-C) averaged 240 +- 90 per ml blood. Estimates based on a blood volume of 7% of body weight indicate that the total blood pools of BFU-E and CFU-C are about 3.5 x 10/sup 6/ and 1.5 x 10/sup 6/ cells respectively. Sequential studies were performed over 3 days following one plateletpheresis in 4 donors. CFU-C and BFU-E approximately doubled between 48 and 72 hours after a plateletpheresis. During this time there was no significant alteration in the percent of null, T or B lymphocytes in blood. Thus, plateletpheresis appears to lead to a mobilization of precursor cells, which results in a transient increase in their concentration in blood. Therefore, pheresis 48 to 72 hours after an initial short-term procedure could harvest much larger numbers of precursor cells. Moreover, such techniques would put blood precursor cell content of plateletpheresis residues within reach of the precursor cell content in the volume of human marrow used for transplantation.
Date:
January 1, 1978
Creator:
Abboud, C.N.; Brennan, J.K.; Lichtman, M.A. & Nusbacher, J.
Object Type:
Report
System:
The UNT Digital Library
Abilene Philharmonic Playbill: January 31-February 28, 1978
Program for an Abilene Philharmonic concert that ran from January 31st to February 28th during the 28th season. It includes information about the pieces performed, artists and musicians, and advertising from local companies.
Date:
January 1978
Creator:
Abilene Philharmonic
Object Type:
Pamphlet
System:
The Portal to Texas History
Simplified inelastic analysis methods applied to fast breeder reactor core design
The paper starts with a review of some currently available simplified inelastic analysis methods used in elevated temperature design for evaluating plastic and thermal creep strains. The primary purpose of the paper is to investigate how these simplified methods may be applied to fast breeder reactor core design where neutron irradiation effects are significant. One of the problems discussed is irradiation-induced creep and its effect on shakedown, ratcheting, and plastic cycling. Another problem is the development of swelling-induced stress which is an additional loading mechanism and must be taken into account. In this respect an expression for swelling-induced stress in the presence of irradiation creep is derived and a model for simplifying the stress analysis under these conditions is proposed. As an example, the effects of irradiation creep and swelling induced stress on the analysis of a thin walled tube under constant internal pressure and intermittent heat fluxes, simulating a fuel pin, is presented.
Date:
January 1, 1978
Creator:
Abo-El-Ata, M. M.
Object Type:
Article
System:
The UNT Digital Library
Preparation and characterization of radioactive samples for various areas of research
Over the past few years, many techniques have been applied by IRML to prepare radioisotope targets and related research materials from actinide and other radioisotopes. Many of these samples were prepared by ceramic technology--an R and D program extending over the past three years. Standard vapor deposition methods have been used to prepare hundreds of fission chamber and other planar samples used in determining cross sections. Refined methods of characterization of all samples have been applied to assure definition of contents to as low as +-0.5% in some cases. Tritium-containing target preparation in support of high yield neutron generators (10/sup 12/ to 10/sup 13/ n/s) has been a continuing development effort both in manufacturing technology and in measurement of tritium content. Of all, however, the largest effort has been development and characterization of neutron dosimetry materials and samples useful for measurement of energy and fluence in reactor core and reflector regions. These dosimeter samples are available for monitoring LWR, CTR, and fast reactor systems.
Date:
January 1, 1978
Creator:
Adair, H.L.
Object Type:
Article
System:
The UNT Digital Library
Convair Report to Supervision, Number 1036, January 23, 1979
Newsletter written for supervisors working at the Convair Division in Fort Worth containing news about events and activities, workplace reminders, and other relevant information.
Date:
January 23, 1978
Creator:
Adams, Richard E.
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Methodologies for assessment of power plant ecological effects in the marine environment
Various types of models or methodologies relevant to the assessment of entrainment, thermal, and impingement impacts of power plant operation in the marine environment are presented. The majority of methodologies available for assessing power plant effects are focused at the organism or population level. The most widely applied approaches for estimating entrainment effects on fish populations are the equivalent adult and trophic-conversion methodologies. Current methods to predict the number of fish and distribution of species impinged consider physical factors of the environment but not the biological or behavorial characteristics of fish. With proper validation, ecosystem-level models that consider aggregate responses of biological components to stress may prove to be a viable approach for investigating power plant ecological effects.
Date:
January 1, 1978
Creator:
Adams, S.M.
Object Type:
Article
System:
The UNT Digital Library
Light curves for ''bump Cepheids'' computed with a dynamically zoned pulsation code
The dynamically zoned pulsation code developed by Castor, Davis, and Davison has been used to recalculate the Goddard model and to calculate three other Cepheid models with the same period (9.8 days). This family of models shows how the bumps and other features of the light and velocity curves change as the mass is varied at constant period. This study, with a code that is capable of producing reliable light curves, shows again that the light and velocity curves for 9.8-day Cepheid models with standard homogeneous compositions do not show bumps like those that are observed unless the mass is significantly lower than the ''evolutionary mass.'' The light and velocity curves for the Goddard model presented here are similar to those computed independently by Fischel, Sparks, and Karp. They should be useful as standards for future investigators.
Date:
January 1, 1978
Creator:
Adams, T. F.; Castor, J. E. & Davis, C. G.
Object Type:
Article
System:
The UNT Digital Library
Flaw location and characterization in anisotropic materials by ultrasonic spectral analysis
A method of quantitatively determining size and location of flaws in anisotropic materials such as stainless steel welds is described. In previous work, it was shown that spectral analysis of a broad band ultrasonic pulse scattered from a defect can be used to determine size and orientation in isotropic materials if the velocity of sound in the material is known. In an anisotropic structural material (stainless steel weld, centrifugal cast pipe), the velocity (both shear and longitudinal) is direction-dependent. When anisotropy is not taken into account, defect location and defect size estimation is misjudged. It will be shown that the effect of this structural variation in materials must be considered to obtain the correct size and location of defects by frequency analysis. A theoretical calculation, including anisotropy, of the scattered field from defects will also be presented.
Date:
January 1, 1978
Creator:
Adler, L.; Cook, K. V.; Simpson, W. A. & Lewis, D. K.
Object Type:
Article
System:
The UNT Digital Library
Ultrasonic Flaw Detection and Characterization in Structural Materials by Spectral Analysis
None
Date:
January 30, 1978
Creator:
Adler, L.; Cook, K. V.; Simpson, W. A.; Lewis, D. K. & Fitting, D. W.
Object Type:
Report
System:
The UNT Digital Library
Ultrasonic characterization of austenitic welds
Nondestructive evaluation of austenitic stainles steel weld metal is a very difficult problem. Mechanical anisotropy appears to be a major contribution and is caused by preferred local orientation of elongated subgrains and preferred crystallographic orientation. The result of this anisotropy is the directional dependence of the ultrasonic velocities (shear and longitudinal) and ultrasonic attenuation. The directional dependence of these ultrasonic parameters causes large errors in locating and sizing flaws in welds. Initial studies were carried out in a type 308 stainless steel electroslag weld to characterize this anisotropy. The apparent symmetry in the macrostructure of the electroslag weld leads us to expect orthotropic symmetry in elastic constants. A technique was developed to measure variations in velocity and attenuation with direction. The velocity data compared favorably to theoretical calculations using this orthotropic model. From the velocity data all elastic constants and engineering constants for this weld were determined. Studies of other types of welds showed that orthotropic symmetry is typical of austenitic welds. Data will be presented to show how anisotropy affects defect location and sizing in welds.
Date:
January 1, 1978
Creator:
Adler, L.; Cook, K.V. & Fitting, D.W.
Object Type:
Article
System:
The UNT Digital Library
Environmental chemistry and cycling processes
Separate abstracts were prepared for the 62 papers presented at the conference. (HLW)
Date:
January 1, 1978
Creator:
Adriano, D. C. & Brisbin, I. L., Jr.
Object Type:
Article
System:
The UNT Digital Library
ACTVE News, Volume 9, Number 1, January 1978
Newsletter issued by the Advisory Council for Technical-Vocational Education in Texas discussing news, events, and other relevant information related to technical and vocational education for adults in Texas.
Date:
January 1978
Creator:
Advisory Council for Technical-Vocational Education in Texas
Object Type:
Journal/Magazine/Newsletter
System:
The Portal to Texas History
Diagnostics of Shiva Nova produced high yield thermonuclear events
Experiments with the Shiva Nova laser facility which produce yield levels of scientific breakeven and above will result in neutron, x-ray and particle fluxes which will require specific attention to the survivability of diagnostic instrumentation. These yield levels will also allow the utilization of new diagnotics techniques which can provide detailed information on the state of the imploded fuel and pusher shells.
Date:
January 1, 1978
Creator:
Ahlstrom, H. G.; Banner, D. L.; Boyle, M. J.; Campbell, E. M.; Coleman, L. W.; Koppel, L. N. et al.
Object Type:
Article
System:
The UNT Digital Library
Excision repair in mammalian cells. [uv radiation, N-acetoxy-2-acetylaminofluorene]
Excision repair after combined treatments of uv and N-acetoxy-2-acetylaminofluorene (AAAF) was studied by three different techniques in cells proficient in uv excision repair and in cells deficient in uv repair. Two patterns of repair were observed: in repair proficient cells total repair was additive, and in repair deficient cells total repair was much less than additive--usually less than observed for separate treatments--and AAAF inhibited dimer excision. We conclude that in the 1st class of cells pathways for repair of uv and AAAF lesions are not identical, and in the 2nd class the residual excision enzymes are different from those in repair proficient cells.
Date:
January 1, 1978
Creator:
Ahmed, F.E. & Setlow, R.B.
Object Type:
Article
System:
The UNT Digital Library
New 10. 6-. mu. m saturable absorber: KCl doped with KReO/sub 4/
A new class of saturable absorbers has been demonstrated using alkali halides doped with metal-oxide anions. The ReO/sub 4/ (perrhenate) molecule-ion has an internal vibrational mode that peaks at the 10.6 ..mu..m, P(28) and 10.6 ..mu..m, P(26) laser lines at 300 K and 105 K, respectively. The absorption saturates like an ideal two-level system at both temperatures due to a large anharmonic interaction with the host crystal. Saturation parameters of 1.45 MW/cm/sup 2/ and 0.21 MW/cm/sup 2/ are determined at 300 K and 105 K and the population relaxation time is about 120 ps at both temperatures. The material has been used for pulse compression and passive mode-locking applications.
Date:
January 1, 1978
Creator:
Ahrenkiel, R. K.; Dunlavy, D.; Figueira, J. F.; Phipps, C. R.; Thomas, S. & Sievers, A. J.
Object Type:
Article
System:
The UNT Digital Library
Workshop on the AGS fixed-target research program
The summarized results of a two day workshop to determine experiment programs for the Brookhaven AGS during the construction period of the ISABELLE storage rings and after are presented. Topics covered include: experiments with low-energy beams; experiments with higher energy beams; neutrino physics; and polarized protons. (GHT)
Date:
January 1, 1978
Creator:
Ahrens, L.; Schewe, P.; Wanderer, P. & Weisberg, H.
Object Type:
Article
System:
The UNT Digital Library
Shock temperatures in metals. Final report, March 29, 1977-September 30, 1978
A system for measurement of the spectral radiace of materials shocked to high pressures (approx. 100 GPa) by impact using a light-gas gun is described. Thermal radiation from the sample is sampled at six wavelength bands in the visible spectrum, and each signal is separately detected by solid state photodiodes and recorded with a time resolution of approx. 10 ns. Interpretation of the records in terms of temperature of transparent sample materials is discussed. Results of a series of exploratory experiments with metals are also given. Shock temperatures in the range 4000/sup 0/K to 8000/sup 0/K have been reliable measured. Spectral radiance and temperatures have been determined with uncertainties of 2%.
Date:
January 1, 1978
Creator:
Ahrens, T.J. & Lyzenga, G.A.
Object Type:
Report
System:
The UNT Digital Library
Diproton resonances in the mass region 2100 to 2800 MeV. [Dispersion relations, scattering amplitude]
A striking energy dependence was observed in the difference between the p--p total cross sections for parallel and antiparallel longitudinal spin states, ..delta..sigma/sub L/ = sigma/sup Tot/(reverse ..-->..)-sigma/sup Tot/(double ..-->..). The structure appears around P/sub lab/ = 1.5 GeV/c where ..delta..sigma/sub L/ = -16.7 mb and is seen in sigma/sup Tot/(double ..-->..) rather than sigma/sup Tot/(reverse ..-->..). The experiments were performed at Argonne National Laboratory using a standard transmission technique. From the dispersion analysis of a forward p--p scattering amplitude using the data on ..delta..sigma/sub L/, Grein and Kroll have shown that the Argand plot of the amplitude has a clear resonance-like behavior around proton-incident momentum of 1.5 GeV/c. At the same energy range, the p--p polarization at fixed -+ also shows a remarkable energy dependence. In addition, a prominent energy dependence was observed for C/sub LL/, the spin correlation parameter for elastic pp scattering with beam and target both longitudinally polarized. The possibility of a resonance was further pursued by studying Legendre expansion coefficients of p--p differential cross section and polarization data. The analysis showed a partial wave, /sup 3/F/sub 3/ consistent with having a resonant behavior. Based on a phase-shift analysis, Hoshizaki also showed that /sup 3/F/sub 3/ …
Date:
January 1, 1978
Creator:
Akihiko, Y.
Object Type:
Article
System:
The UNT Digital Library
Release of fission products during controlled loss-of-coolant accidents and hypothetical core meltdown accidents. [PWR; BWR]
A few years ago the Projekt Nukleare Sicherheit joined the United States Nuclear Regulatory Commission in the development of a research program which was designed to investigate fission product release from light water reactor fuel under conditions ranging from spent fuel shipping cask accidents to core meltdown accidents. Three laboratories have been involved in this cooperative effort. At Argonne National Laboratory (ANL), the research effort has focused on noble gas fission product release, whereas at Oak Ridge National Laboratory (ORNL) and at Kernforschungszentrum Karlsruhe (KfK), the studies have emphasized the release of species other than the noble gases. In addition, the ORNL program has been directed toward the development of fission product source terms applicable to analyses of spent fuel shipping cask accidents and controlled loss-of-coolant accidents, and the KfK program has been aimed at providing similar source terms which are characteristic of core meltdown accidents. The ORNL results are presented for fission product release from defected fuel rods into a steam atmosphere over the temperature range 500 to 1200/sup 0/C, and the KfK results for release during core meltdown sequences.
Date:
January 1, 1978
Creator:
Albrecht, H. & Malinauskas, A.P.
Object Type:
Article
System:
The UNT Digital Library
Acoustic methods for detecting water-filled fractures using commercial logging tools
The Los Alamos Scientific Laboratory Hot Dry Rock Geothermal Energy Development Project, under the Department of Energy and in cooperation with Dresser Atlas, has conducted single- and dual-well acoustic measurements to detect fractures in the artificial geothermal reservoir at the Fenton Hill New Mexico experimental site. The measurements were made using modified Dresser Atlas logging tools. Signals traversed distances of from 48 to 150 feet between two wells. Signals intersecting hydraulic fractures in the reservoir under both hydrostatic and pressurized conditions were simultaneously detected in both wells. Upon reservoir pressurization, signals along many ray paths were severely attenuated throughout their entire coda. In addition obvious shear wave arrivals were notably absent. The signals were processed to obtain Full-Wave Acoustic, Power, and Normalized Equi-Power Logs. Analysis of these logs identified the effective ''top'' of a region of hydraulically activated fractures and fractures intersecting the injection well behind casing.
Date:
January 1, 1978
Creator:
Albright, J. N.; Aamodt, R. L.; Potter, R. M. & Spence, R. W.
Object Type:
Article
System:
The UNT Digital Library