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Field theory of pion-nucleus interactions

Description: Some approximate solutions of the Low equations for pi-nucleon scattering, pi-nuclear scattering and the pp ..-->.. d..pi../sup +/ reaction are discussed. Results differ from those of other treatments by the inclusion of propagator modifications which act as cutoffs for terms involving pions of relatively small momenta. Because of these propagator modifications the use of a pi-nucleon T-matrix of long range is perfectly consistent with the idea that the fundamental pi-nucleon form factor is of very short range. The origin of these propagator modifications is shown to be a proper evaluation of the energy dependence of the off-shell pi-nucleon scattering amplitude. As a consequence of the theory, good agreement with pp ..-->.. d..pi../sup +/ data is obtained without the inclusion of large effects from rho-meson exchange terms. 22 references.
Date: January 1, 1979
Creator: Miller, G.A.
Partner: UNT Libraries Government Documents Department

Plasma transport and flow in the fluid picture

Description: The fluid equations are applied to cylindrical pinches, and the role of resistivity, heat conductivity, and viscosity is examined. Analytical solutions for special cases are reviewed. One-dimensional partial differential equations suitable for numerical solution are derived that describe: (1) the radial evolution of a pinch and (2) theta-pinch end loss (for r = 0).
Date: August 1, 1978
Creator: Miller, G.
Partner: UNT Libraries Government Documents Department

Toroidal equilibrium in an iron-core reversed field pinch

Description: An analytical theory of toroidal equilibrium in the ZT-40M reversed field pinch is obtained, including effects of iron cores and resistive shell. The iron cores alter the form of the equilibrium condition and cause the equilibrium to be unstable on the shell resistive time scale.
Date: April 1, 1984
Creator: Miller, G.
Partner: UNT Libraries Government Documents Department

Improved process for welding studs

Description: A 4-40 UMC-2A, 321 stainless steel welded stud (4.77 +- 0.38 mm or 0.188 +- 0.015 in.) could not be adapted to production because of its short length. A longer stud with a necked area was developed for the production process. After percussive arc welding the stud, the material above the necked ared was removed by applying torque leaving a welded stud which meets the original design requirements. The torque applied to remove excess material provides quality acceptance of the welded part.
Date: December 1, 1978
Creator: Miller, G.P.
Partner: UNT Libraries Government Documents Department

Measurement of magnetic fluctuations on ZT-40(M)

Description: The mathematical basis for experimental measurement of magnetic fluctuations in a Reversed Field Pinch is reviewed. A quasi-static drift model is introduced as the frame-work for analysis of the five-fixed-probe technique. The extrapolation of edge-measured {rvec B}{sub r} fluctuations into the plasma is discussed. Correlations between magnetic and other fluctuations expected from a quasi-static model are derived and transport-relevant correlations are discussed. Data from ZT-40(M) are presented.
Date: January 1, 1990
Creator: Miller, G.
Partner: UNT Libraries Government Documents Department

Resistive evolution of general plasma configurations

Description: The resistive evolution through equilibrium states of general plasma configurations with closed magnetic field lines is described. Cases where the magnetic field forms magnetic surfaces and where the magnetic field is ergodic are treated. In the former case, a simple equation for the rate of change of rotational transform at fixed values of toroidal flux is obtained, as is already known. In the latter case the evolution of the equilibrium is naturally described in terms of the magnetic helicity by use of the formalism of relaxed states introduced by J.B. Taylor. The equation for rate of change of magnetic helicity is shown to be a general law of resistive evolution, implying the former equation for rotational transform in the case of magnetic surfaces. In principle, the resistive evolution model provides a complete description of global long-time-scale plasma behavior in the limit where the plasma density vanishes. In this limit, the magnetohydrodynamic description of a plasma is not practical because of the vanishing of the inertial time scale.
Date: September 1, 1984
Creator: Miller, G.
Partner: UNT Libraries Government Documents Department

Mechanical analysis of LOFT reactor internals due to loss of coolant accidents

Description: A linear elastic analysis of the LOFT reactor internals was conducted to demonstrate the structural integrity of the reactor system during two Loss-of-Coolant Accidents (LOCA). Time dependent pressure transients were used to predict the behavior of the internals for the following LOCA's: 14'' 15 msec reactor vessel nozzle hot leg break; and 14'' 15 msec reactor vessel nozzle cold leg break. For the most severe design LOCA (Cold Leg LOCA), the LOFT reactor internals can safely withstand stresses due to a combination of pressure transient loading and seismic loading.
Date: July 10, 1978
Creator: Miller, G.K.
Partner: UNT Libraries Government Documents Department

Alarm points for fixed oxygen monitors

Description: Oxygen concentration monitors were installed in a vault where numerous pipes carried inert cryogens and gases to the Mirror Fusion Test Facility (MFTF-B) experimental vessel at Lawrence Livermore National Laboratory (LLNL). The problems associated with oxygen-monitoring systems and the reasons why such monitors were installed were reviewed. As a result of this review, the MFTF-B monitors were set to sound an evacuation alarm when the oxygen concentration fell below 18%. We chose the 18% alarm criterion to minimize false alarms and to allow time for personnel to escape in an oxygen-deficient environment.
Date: May 1, 1987
Creator: Miller, G.C.
Partner: UNT Libraries Government Documents Department

Models of nucleons in nuclei

Description: I discuss models of nuclear deep inelastic scattering and Drell-Yan processes. A combination of binding Fermi motion pion excess and shadowing effects allows one to reproduce the qualitative features of both data sets.
Date: January 1, 1990
Creator: Miller, G.A.
Partner: UNT Libraries Government Documents Department

Nucleon models of deep inelastic scattering

Description: Nucleon models should describe both deep inelastic scattering and low energy phenomenology. We review some recent calculations of valence quark distributions. Models in which the valence quarks are the only dynamical variables fail to describe the data, since the valence quarks saturate the energy-momentum sum rule. This is in sharp disagreement with existing data which indicate that a substantial fraction of the nucleon's momentum is carried by glue and sea even for Q{sup 2} as low as 0.5 GeV{sup 2}.
Date: January 1, 1992
Creator: Miller, G.A.
Partner: UNT Libraries Government Documents Department

Ultrasonic level and temperature sensor for power reactor applications

Description: An ultrasonic waveguide employing torsional and extensional acoustic waves has been developed for use as a level and temperature sensor in pressurized and boiling water nuclear power reactors. Features of the device include continuous measurement of level, density, and temperature producing a real-time profile of these parameters along a chosen path through the reactor vessel.
Date: January 1, 1983
Creator: Dress, W.B.: Miller, G.N.
Partner: UNT Libraries Government Documents Department

Independent review of design and analysis for Holtec spent fuel storage racks of CPP 666 Pool 1

Description: This document summarizes the analyses and review performed to develop and validate the design of the new fuel storage racks for the Idaho Chemical Processing Plant (ICPP) Fuel Storage Area (FSA). Holtec International is responsible for the design and fabrication of the storage racks. This report describes the issues raised in the review effort and the resolutions to these issues. The conclusion is reached that the review issues for the racks of Pool 1 have been satisfactorily resolved in the final design and analysis for these racks. Section 1 of this report gives a brief description of the project. Section 2 describes the approach that Holtec used in analyzing the racks and results from these analyses. Section 3 describes the independent review process. Section 4 discusses the identification of and resolution to comments on the design analysis. Section 5 describes additional analysis performed to address major concerns with the Holtec design analysis. Section 6 presents a summary of AEC`s independent review, which is based on AEC`s final review report. Finally, Section 7 gives the Lockheed Idaho Technologies Company (LITCO) position on the acceptability of Holtec`s design.
Date: March 1, 1996
Creator: Miller, G.K.
Partner: UNT Libraries Government Documents Department