Author: Erik Lehman VoldPublisher:
ISBN:
Category :
Languages : en
Pages : 90
Book Description
Tokamak Power Reactor Ignition and Time Dependent Fractional Power Operation
Author: Erik Lehman VoldTokamak Power Reactor Ignition and Time Dependent Fractional Power Operation
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A flexible time-dependent and zero-dimensional plasma burn code with radial profiles was developed and employed to study the fractional power operation and the thermal burn control options for an INTOR-sized tokamak reactor. The code includes alpha thermalization and a time-dependent transport loss which can be represented by any one of several currently popular scaling laws for energy confinement time. Ignition parameters were found to vary widely in density-temperature (n-T) space for the range of scaling laws examined. Critical ignition issues were found to include the extent of confinement time degradation by alpha heating, the ratio of ion to electron transport power loss, and effect of auxiliary heating on confinement. Feedback control of the auxiliary power and ion fuel sources are shown to provide thermal stability near the ignition curve.
Fusion Energy Update
Author: Emerging Nuclear Energy Ststems: Icenes '93 - Proceedings Of The Seventh International Conference
Author: H YasudaPublisher: World Scientific
ISBN: 9814551635
Category :
Languages : en
Pages : 582
Book Description
To overcome the problems of system theory and network theory over real field, this book uses matrices over the field F(z) of rational functions in multi-parameters describing coefficient matrices of systems and networks and makes systems and network description over F(z) and researches their structural properties: reducible condition of a class of matrices over F(z) and their characteristic polynomial; type-1 matrix and two basic properties; variable replacement conditions for independent parameters; structural controllability and observability of linear systems over F(z); separability, reducibility, controllability, observability and structural conditions of networks over F(z), and so on. This book involves three subjects: systems, networks and matrices over F(z), which is an achievement of interdisciplinary research.
Energy Research Abstracts
Author: Publisher:
ISBN:
Category : Power resources
Languages : en
Pages : 806
Book Description
Semiannual, with semiannual and annual indexes. References to all scientific and technical literature coming from DOE, its laboratories, energy centers, and contractors. Includes all works deriving from DOE, other related government-sponsored information, and foreign nonnuclear information. Arranged under 39 categories, e.g., Biomedical sciences, basic studies; Biomedical sciences, applied studies; Health and safety; and Fusion energy. Entry gives bibliographical information and abstract. Corporate, author, subject, report number indexes.
Fractional Power Operation of Tokamak Reactors
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
The capability of a power plant to operate at a wide range of output power is essential for initial commissioning and normal maintenance. In this work, we explore critical physics issues related to operating a tokamak fusion reactor at fractions of its rated power and identify methods for power control. Analysis is carried out with a steady-state, profile-dependent, zero-dimensional power balance model of the plasma in which several empirical transport scalings appropriate to tokamaks are used. It is found that reactor operation depends strongly on the confinement model, plasma .beta. limit, and the effect of alpha power on transport. Parametric calculations indicate that density, auxiliary heating power and an effective external confinement control mechanism are the key control elements, and burn control is required in most cases. Transition between power plateaus is facilitated by operating, in the hybrid transformer mode. In general, the impact of fractional power operation on full power reactor designs appears to be small.
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