부산대학교 도서관

This volume is devoted to presenting information pertinent to process modeling of nuclear fuel fabrication facilities. The goal of such a modeling effort would be to produce mathematical simulation models of components of fuel fabrication operations. These models would be used to aid in material control so that safeguarding of nuclear facilities against unauthorized diversion of nuclear material could be improved. Nuclear fuel fabrication facilities contain both continuous and batch type operations. If a useful model of the whole process is to be developed, techniques for modeling and simulation of each must be applied. Section 2 of this report presents methods that could be applied in building a continuous model on a digital computer. The section presents numerical methods for solving differential equations and continuous simulation languages and packages used on a digital computer. Also presented is some information on various computer capabilities. Section 3 reviews the work that has been done in batch modeling of fuel fabrication facilities and includes a brief description of simulation languages that have been used. A discussion is also included on desirable features of a modeling package and common features of batch processes from a modeling standpoint. The application of a systematic approach based on analyzing process steps is shown to be important in modeling efforts. The final three sections of the report present a literature review and discussion of the theory and past modeling of selected individual process steps. Special attention has been given to powder mixing. In addition modeling of solids handling and fluidized beds are considered.