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519
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Liquid to gas leak ratios with liquid nitrogen and liquid helium
To predict the leak rates of liquid helium and liquid nitrogen containers at operating conditions we need to know how small leaks (10/sup -8/ to 10/sup -5/ atm-cm/sup 3/ air/s), measured at standard conditions, behave when flooded with these cryogens. Two small leaks were measured at ambient conditions (approx.750 Torr and 295 K), at the normal boiling points of LN/sub 2/ and LHe, and at elevated pressures above the liquids. The ratios of the leak rates of the liquids at ambient pressure to the gases (G) at ambient pressure and room temperature were: GN/sub 2/(1), LN/sub 2/(18), GHe(1), and LHe(172). The leak rate ratio of LN/sub 2/ at elevated pressure was linear with pressure. The leak rate ratio of LHe at elevated pressure was also linear with pressure.
Date:
February 26, 1985
Creator:
Batzer, T. H. & Call, W. R.
Object Type:
Article
System:
The UNT Digital Library
Hydrology and geochemistry of the uranium mill tailings pile at Riverton, Wyoming. Part II. History matching. [Mathematical simulation of the observed fluid potentials within the tailings, and the observed distribution of various chemical species within and around the mill tailings]
In Part I of this series of two reports the observed fluid potential and geochemical characteristics in and around the inactive uranium mill tailings pile at Riverton, Wyoming were presented. The prupose of the present work is to attempt to simulate field observations using mathematical models. The results of the studies have not only helped identify the physicochemical mechanisms govering contaminant migration around the inactive mill tailings pile in Riverton, but also have indicated the feasibility of quantifying these mechanisms with the help of newly developed mathematical models. Much work needs to be done to validate and benchmark these models. The history-matching effort on hand involves the mathematical simulation of the observed fluid potentials within the tailings, and the observed distribution of various chemical species within and around the inactive uranium mill tailings. The simulation problem involves consideration of transient fluid flow and transient, reactive chemical transport in a variably saturated ground water system with time-dependent boundary conditions. 15 refs., 30 figs., 3 tabs.
Date:
February 1, 1985
Creator:
Narasimhan, T.N.; White, A.F. & Tokunaga, T.
Object Type:
Report
System:
The UNT Digital Library
New harmonic materials: index engineering. Thin-thick quadrature frequency conversion
The quadrature conversion scheme is a method of generating the second harmonic. The scheme, which uses two crystals in series, has several advantages over single-crystal or other two crystal schemes. The most important is that it is capable of high conversion efficiency over a large dynamic range of drive intensity and detuning angle. Consider a pair of KDP crystals cut for type-II phase matching. In the quadrature scheme, the optic axes of the crystals are arranged so that the plans containing the direction of the laser beam and their optic axes (the kz planes) are mutually perpendicular. This arrangement has two important properties. First, in type-II phase matching, the incident wave is polarized at 45 deg to the kz plane of the crystal. This, in the quadrature scheme, if the incident wave is correctly polarized for efficient conversion in the first crystal, it is also correctly polarized for efficient conversion in the second crystal. Both crystals can therefore convert efficiently.
Date:
February 7, 1985
Creator:
Eimerl, D.
Object Type:
Article
System:
The UNT Digital Library
Environmental monitoring at the Lawrence Livermore National Laboratory. 1984 annual report
A strict effluent-control program that emphasizes controlling effluents at the source has been in effect since LLNL began operation. The Environmental Monitoring program evaluates the effectiveness of these measures, documents whether effluents from LLNL and Site 300 operations are within applicable standards, and estimates the impact of these operations on the environment. Sensitive monitoring equipment is used that can detect radioactive and nonradioactive pollutants at environmental background levels. The program includes the collection and analysis of air, soil, water, sewer effluent, vegetation, foodstuffs, and milk samples. Also, environmental background radiation is measured at numerous locations in the vicinity of LLNL using gamma and neutron dosimeters. This report summarizes the results of the 1984 program. 28 refs, 25 figs., 40 tabs.
Date:
February 1, 1985
Creator:
Griggs, K.S.; Myers, D.S. & Buddemeier, R.W.
Object Type:
Report
System:
The UNT Digital Library
Seismic risk assessment of a BWR: status report
The seismic risk methodology developed in the US NRC Seismic Safety Margins Research Program (SSMRP) was demonstrated by its application to the Zion nuclear power plant, a pressurized water reactor (PWR). A detailed model of Zion, including systems analysis models (initiating events, event trees, and fault trees), SSI and structure models, and piping models was developed and analyzed. The SSMRP methodology can equally be applied to a boiling water reactor (BWR). To demonstrate its applicability, to identify fundamental differences in seismic risk between a PWR and a BWR, and to provide a basis of comparison of seismic risk between a PWR and a BWR when analyzed with comparable methodology and assumptions, a seismic risk analysis is being performed on the LaSalle County Station nuclear power plant.
Date:
February 1, 1985
Creator:
Chuang, T. Y.; Bernreuter, D. L.; Wells, J. E. & Johnson, J. J.
Object Type:
Article
System:
The UNT Digital Library
Nuclear performance optimization of the Be/Li/Th blanket for the fusion breeder
More rigorous nuclear analysis, including treatment of resonance self-shielding effects coupled with an optimization procedure, has resulted in improved performance of the Be/Li/Th blanket. Net U-233 breeding ratio has increased 36% (to 0.84) while at an average U-233/Th ratio of 0.5 a/o average energy multiplication has increased only 12% (to 2.1) compared with earlier results.
Date:
February 26, 1985
Creator:
Lee, J. D. & Bandini, B. R.
Object Type:
Article
System:
The UNT Digital Library
Multivariable current control for electrically and magnetically coupled superconducting magnets. Revision 1
Superconducting magnet systems under construction and projected for the future contain magnets that are magnetically coupled and electrically connected with shared power supplies. A change in one power supply voltage affects all of the magnet currents. A current controller for these system must be designed as a multivariable system. The power describes a method, based on decoupling control, for the rational design of these systems. Dynamic decoupling is achieved by cross-feedback of the measured currents. A network of gains at the input decouples the system statically and eliminates the steady-state error. Errors are then due to component variations. The method has been applied to the magnet system of the MFTF-B, at the Lawrence Livermore National Laboratory.
Date:
February 8, 1985
Creator:
Owen, E. W. & Shimer, D. W.
Object Type:
Article
System:
The UNT Digital Library
Real time bunch length measurements in the SLC linac
The longitudinal charge distribution of bunches accelerated in the Stanford Linear Collider (SLC) linac will strongly affect the performance of the Collider. Bunch lengths are chosen in a balance between the deleterious effects of longitudinal and transverse wakefields. The former impacts on the beam energy spread whereas the latter is important to the transverse emittance. Two bunch length measurement ports have been installed in the SLC linac: one in the injector region and one after the emittance damping ring to linac reinjection point. These ports utilize a fused quartz Cerenkov radiator in conjunction with an electrooptic streak camera to permit real time monitoring of single s-band buckets with a resolution of several picoseconds. The design of the radiators and light collection optics is discussed with an emphasis on those issues important to high resolution. Experimental results are presented. 7 refs., 4 figs.
Date:
February 1, 1985
Creator:
Sheppard, J. C.; Clendenin, J. E.; James, M. B.; Miller, R. H. & Ross, M. C.
Object Type:
Article
System:
The UNT Digital Library
Last hurrah for quarkonium physics: the top system
The present knowledge about heavy quark systems is applied to the top system - both toponium and open top. Properties of these systems are predicted. What can be learned from toponium about quarkonium physics under realistic experimental conditions is also discussed. The spectrum of toponium states is discussed: the expected excitation spectrum, the implications for probing the heavy quark potential, and an estimate of the fine and hyperfine splittings. Production and decay properties are discussed, particularly emphasizing the growing importance of electroweak effects on the decays of toponium states. The properties of low-lying open top mesons are also dicussed. Some more exotic possibilities are considered, particularly: (1) the influence of light charged or neutral Higgs-like scalars on toponium decays, (2) possible direct production of J = 1 (t anti t) P-states via the axial vector coupling of the Z/sup 0/ to (t anti t), and (3) toponium - Z/sup 0/ interference effects which would result if the mass difference between some toponium resonance and the Z/sup 0/ were less than the width of the Z/sup 0/. The present situation of the nonrelativistic potential between heavy quarks is discussed. 53 refs., 29 figs., (LEW)
Date:
February 1, 1985
Creator:
Eichten, E.
Object Type:
Article
System:
The UNT Digital Library
Novette diagnostic support. Final report
The primary research areas were the following: (1) contribute x-ray diagnostic, experimental, and data reduction and analysis support for the Novette DANTE x-ray spectrometer experiments. This effort was expanded to improve the overall quality of the Novette database; (2) experimental and calculational characterization of the x-ray imaging properties of an ellipsoidal x-ray collection optic serving as a sensitivity enhancing component of the Transmission Grating Streak Spectrometer; (3) performance simulation of the x-ray dispersion properties of candidate x-ray laser cavity, normal incidence end-mirror optics; (4) contribute x-ray diagnostic, experimental, and data reduction and analysis support for the Novette Henway crystal spectrometer and the MCPIGS microchannel plate intensified grazing incident spectrometer experiments; and (5) perform a technical performance vs cost evaluation of commercially available hardware required to perform the NOVA neutron time-of-flight experiments.
Date:
February 1, 1985
Creator:
Cirigliano, R.; Franco, E.; Koppel, L.; Rodrigues, B. & Smith, J.
Object Type:
Report
System:
The UNT Digital Library
[Photograph 2012.201.B0353.0086]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "A worried Melvin Laird, a member of Phillips board of directors and former defense secretary, turns to listen to remarks made at the stockholders meeting Friday."
Date:
February 22, 1985
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0190]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Jim Jenkins - Blackwell"
Date:
February 21, 1985
Creator:
Argo, Jim
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0313B.0035]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Eric Caves and Amy Cole are members of Jefferson Middle School's "A" Team."
Date:
February 1, 1985
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0249.0641]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Cheryl Brown, Lil Ross and Jane Harlow, from left, were at the fashion show."
Date:
February 13, 1985
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0151]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 12, 1985
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0272.0154]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Alice Hoffman, Sue Ann Hyde and Danny Bea Hightower, from left, try the buffet table."
Date:
February 18, 1985
Creator:
Albright, Bob
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0267.0041]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 13, 1985
Creator:
unknown
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0312B.0266]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 13, 1985
Creator:
Southerland, Paul
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0306B.0539]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Chatting during the rally are, from left, Jerry Jones, Goree James and Harvey Turner."
Date:
February 22, 1985
Creator:
Gooch, Steve
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0334.0305]
Photograph used for a newspaper owned by the Oklahoma Publishing Company. Caption: "Garrett Redbird"
Date:
February 9, 1985
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0354.0830]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Lea-Patricia Real, left, and Monique Spotwood get their exercise on the mini-trampoline during the YMCA's 'Prime Time' after-school program."
Date:
February 5, 1985
Creator:
Howell, Paul S.
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0334.0306]
Photograph used for a newspaper owned by the Oklahoma Publishing Company.
Date:
February 9, 1985
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0069]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Donna Findley, left, and Barbara Jett get more goodies."
Date:
February 13, 1985
Creator:
Miller, Joe
Object Type:
Photograph
System:
The Gateway to Oklahoma History
[Photograph 2012.201.B0310B.0158]
Photograph used for a story in the Daily Oklahoman newspaper. Caption: "Martin C. Jischke sits with guest speaker Margaret N. Maxey."
Date:
February 26, 1985
Creator:
McDaniel, David
Object Type:
Photograph
System:
The Gateway to Oklahoma History