Author: Jianqing YePublisher:
ISBN:
Category :
Languages : en
Pages : 132
Book Description
Optimal Core Control for Pressurized Water Reactors Utilizing Simulated Annealing
Author: Jianqing YePressurized Water Reactor Core Control Optimization Utilizing the Optimal Control Theory
Author: Jianqing YeA Hybrid Method for In-core Optimization of Pressurized Water Reactor Reload Core Design
Author: Publisher:
ISBN:
Category :
Languages : en
Pages : 209
Book Description
The objective of this research is the development of an accurate, practical, and robust method for optimization of the design of loading patterns for pressurized water reactors, a nonlinear, non-convex, integer optimization problem. The many logical constraints which may be applied during the design process are modeled herein by a network construction upon which performance objectives and safety constraints from reactor physics calculations are optimized. This thesis presents the synthesis of the strengths of previous algorithms developed for reload design optimization and extension of robustness through development of a hybrid liberated search algorithm. Development of three independent methods for reload design optimization is presented: random direct search for local improvement, liberated search by simulated annealing, and deterministic search for local improvement via successive linear assignment by branch and bound. Comparative application of the methods to a variety of problems is discussed, including an exhaustive enumeration benchmark created to allow comparison of search results to a known global optimum for a large scale problem. While direct search and determinism are shown to be capable of finding improvement, only the liberation of simulated annealing is found to perform robustly in the non-convex design spaces. The hybrid method SHAMAN is presented. The algorithm applies: determinism to shuffle an initial solution for satisfaction of heuristics and symmetry; liberated search through simulated annealing with a bounds cooling constraint treatment; and search bias through relational heuristics for the application of engineering judgment. The accuracy, practicality, and robustness of the SHAMAN algorithm is demonstrated through application to a variety of reload loading pattern optimization problems.
Pressurized Water Reactors
Author: Yurugi KanzakiPublisher: Elsevier
ISBN: 0128235845
Category : Technology & Engineering
Languages : en
Pages : 507
Book Description
Pressurized Water Reactors, Volume Three in the JSME Series on Thermal and Nuclear Power Generation, compiles the latest research on Pressurized Water Reactors (PWRs) into a very comprehensive reference, beginning with its history. The reader is then guided through optimum design processes for PWRs, considering safety throughout. The authors then discuss thermal-hydraulic aspects within the PWR system and inside the reactor core, making this a valuable resource for nuclear and thermal engineers and researchers. Combining their wealth of experience, the book presents in-depth knowledge on the advancement and improvement of fuel rods that is gleaned from decades of experience and lessons learned. The inclusion of analysis codes for the design and safety elements ensure makes this a unique reference which will provide the reader with a solid understanding which they can transfer to their own professional and research settings. Future prospects for next generation PWR and Small Modular Reactors are also discussed, giving the reader a basis for further research of their own. Contains contributions from the leaders and pioneers in nuclear research at the Japanese Society of Mechanical Engineers and draws upon their combined wealth of knowledge and experience Includes analysis codes, such as RELAP5, for the design and safety improvement of pressurized water reactors (PWRs) Presents history, examples, and case studies from Japan and other key regions, such as the United States and Europe
Core Control Optimization for Scheduled Load Changes in Large Pressurized Water Reactors
Author: J. KarppinenMethods for optimal spatial control of pressurized water reactors
Author: Ilkka LeikkonenPublisher:
ISBN: 9789516661967
Category : Nuclear reactors
Languages : en
Pages : 106
Book Description
Optimal Spatial Control of Pressurized Water Nuclear Reactors
Author: Jorma KarppinenPublisher:
ISBN:
Category : Pressurized water reactors
Languages : en
Pages : 15
Book Description
Optimizing SFR Transmutation Performance Through Direct Adjoining Control Theory
Author: Jeffrey C. DavisPublisher:
ISBN:
Category : Sodium cooled reactors
Languages : en
Pages : 390
Book Description
A Core Reload Pattern and Composition Optimization Methodology for Pressurized Water Reactors
Author: Ildo Luis SauerPublisher:
ISBN:
Category : Pressurized water reactors
Languages : en
Pages : 283
Book Description
The primary objective of this research was the development of a comprehensive, rapid and conceptually simple methodology for PWR core reload pattern and fuel composition optimization, capable of systematic incorporation of constraints, in which cycle burnup is defined as the optimality criterion. A coarse mesh nodal method for PWR core analysis was formulated by coupling the one-and-one-half-group diffusion theory model for spatial power calculations with the linear reactivity versus burnup model (LRM) for depletion calculations. The accuracy and suitability of this model was determined through comparisons of its results with those of state-of-the-art core analysis methods. The simplicity of the LRM-based core model allowed the direct analytical computation of the derivatives necessary in the steepest gradient type optimization methods applied in the present work, and its versatility permitted use of the analytical and computational methods for a variety of applications, ranging from core reload pattern searches to burnable poison (BP) and composition optimization. Algorithms for identification of unconstrained maximum-burnup core reload patterns and for optimal BP allocation were successfully implemented and tested, and the basis for systematic incorporation of constraints on power peaking was developed. The potential application of the methodology to fuel composition optimization was also examined. Most of the methodological developments have been embodied in the LRM-NODAL code which was programmed in the course of this research. From the numerical and analytical results it was found that the optimal core configurations are arranged such as to produce power histories and profiles in which the most reactive assemblies are at their highest allowable power at EOC (thus maximizing their importance) and where the converse applies to the least reactive; these preferred profiles also produce relatively higher leakage at EOC, evolving to the lowest possible leakage at EOC, but always consistent with the maximization of the core reactivity importance.
Reactor Core Control for Large Pressurized Water Reactors
Author: Westinghouse Electric Corporation. Nuclear Training ServicesPublisher:
ISBN:
Category : Nuclear power plant operators
Languages : en
Pages :
Book Description