An Evaluation of State-Of-The-Art Two-Velocity Two-Phase Flow Models and Their Applicability to Nuclear Reactor Transient Analysis. Volume 2. Theoretical Bases.

摘要

The Electric Power Research Institute (EPRI) sponsored this state-of-the-art review in order to provide the nuclear industry with a publicly available assessment of two velocity thermal-hydraulic models and their applicability to nuclear reactor technology. The two major objectives of this state-of-the-art evaluation were: (1) document the basic theory in a consistent self-contained report;and (2) apply a prototype 'two-velocity'code (UVUT) to a limited number of separate effect tests. The results of this study are presented in three volumes;Volume 1is a summary of the entire effort;Volume 2contains the theoretical basis of the two-velocity models;and Volume 3presents the data comparisons. The theoretical basis of the two-velocity models given in Volume 2is divided into three parts;Part I is the derivation of the basic differential equations;Part II describes in detail,the constitutive models required for closure of the system of equations;and Part III presents the numerical solution schemes.