Author: Shahid Nawaz MirzaPublisher:
ISBN:
Category :
Languages : en
Pages : 163
Book Description
Stochastic Modelling of Power Reactor Fuel Behavior
Author: Shahid Nawaz MirzaStochastic Simulation of Sphere Beds and the Effect of Packing Density on the Thermal Conductivity of Sphere Pac Nuclear Fuels
Author: Robert K. HenkePublisher:
ISBN:
Category : Nuclear fuels
Languages : en
Pages : 260
Book Description
The establishment of any thermal model of reactor fuel requires a thorough understanding of the behavior of the thermal conductivity. This is especially true in the case of sphere pac fuels where the conductivity is a function of many variables beyond those normally affecting conventional fuels. One of these variables, packing density, is not fully accounted for in present unit cell models of thermal conductivity. In this thesis, a method has been developed whereby the effect of packing density and its importance can be evaluated for any type of unit cell. The effect of packing density is due to the random orientation of the unit cells in the bed with respect to heat flow. The calculation of the "cell orientation effect" must therefore account for each cell in the packing. This requirement resulted in the development of the RANDPAC code - a Monte Carlo program for simulating the packing of spheres in a cylinder. RANDPAC generates and provides detailed information concerning the location and coordination of every sphere in a random cylindrical bed. By coupling this information with data pertinent to the characterization of the unit cells in the bed, the effective conductivity of the bed relative to the unit cell conductivity (the cell orientation factor) can be evaluated. This procedure is carried out by the ORIENT code. Evaluation of the orientation factor for a unit cell currently in use has shown that packing density has a significant effect which cannot be ignored in modeling sphere pac fuels. Additionally, the variation of the orientation factor is seen to be strongly dependent on both cell geometry and the variation of cell geometry with changes in packing factor. Further improvements need to be made to the RANDPAC code to allow these dependencies to be better quantified.
Nuclear Reactor Kinetics and Control
Author: Jeffery LewinsPublisher: Elsevier
ISBN: 1483278751
Category : Technology & Engineering
Languages : en
Pages : 282
Book Description
Nuclear Reactor Kinetics and Control highlights the application of classical control methods in the frequency space to the dynamic processes of a nuclear reactor. This book contains nine chapters and begins with an introduction to some important mathematical theories related to nuclear engineering, such as the Laplace and Fourier transforms, linear system stability, and the probability theory. The succeeding chapters deal with the frequency space of classical linear design. A chapter describes a stochastic model for the “lumped reactor and presents equations that measure the departure from the mean, as well as representative experiments or applications of the theory to neutron detection. The discussion then shifts to the aspects of reliability and its consequences for safety of nuclear reactors and some techniques for nonlinear studies centered on the use of the state space and its equations in the time domain. The final chapter introduces the modern electric analogue computer and derives the patching or programming rules that can be use to find solutions to problems of interest using the analogous behavior of electric circuits. This chapter also provide examples of intrinsic interest in nuclear engineering showing the programming involved and typical results, including the slower transients of xenon poisoning and fuel burn-up. This book is intended for nuclear engineers, physicists, applied mathematicians, and nuclear engineering undergraduate and postgraduate students.
A Stochastic Model of a Two-region Nuclear Power Reactor with Xenon
Author: Val PrescopPublisher:
ISBN:
Category : Carnegie-Mellon University
Languages : en
Pages : 0
Book Description
Influence of FRAPCON-1 Evaluation Models on Fuel Behavior Calculations for Commercial Power Reactors. [PWR ; BWR].
![Influence of FRAPCON-1 Evaluation Models on Fuel Behavior Calculations for Commercial Power Reactors. [PWR ; BWR]. PDF](https://books.google.com/books/content/images/frontcover/WcR7AQAACAAJ?fife=w80-h100)
Author: Publisher:
ISBN:
Category :
Languages : en
Pages :
Book Description
A preliminary set of nine evaluation models (EMs) was added to the FRAPCON-1 computer code, which is used to calculate fuel rod behavior in a nuclear reactor during steady-state operation. The intent was to provide an audit code to be used in the United States Nuclear Regulatory Commission (NRC) licensing activities when calculations of conservative fuel rod temperatures are required. The EMs place conservatisms on the calculation of rod temperature by modifying the calculation of rod power history, fuel and cladding behavior models, and materials properties correlations. Three of the nine EMs provide either input or model specifications, or set the reference temperature for stored energy calculations. The remaining six EMs were intended to add thermal conservatism through model changes. To determine the relative influence of these six EMs upon fuel behavior calculations for commercial power reactors, a sensitivity study was conducted. That study is the subject of this paper.
A Stochastic Model of Xenon Formation in a Nuclear Power Reactor
Author: Val PrescopEnergy Research Abstracts
Author: Nuclear Science Abstracts
Author: Scientific and Technical Aerospace Reports
Author: Handbook of Nuclear Engineering
Author: Dan Gabriel CacuciPublisher: Springer Science & Business Media
ISBN: 0387981306
Category : Science
Languages : en
Pages : 3701
Book Description
This is an authoritative compilation of information regarding methods and data used in all phases of nuclear engineering. Addressing nuclear engineers and scientists at all levels, this book provides a condensed reference on nuclear engineering since 1958.