20.08.2015   NUCLEAR REACTOR ENGINEERING

CORE FLUID FLOW

Introduction

9.109. Since energy must be removed from the core by the flow of the coolant, some well-known flow fundamentals are reviewed here. We re­strict our attention to semiempirical methods that have been used for many years to solve practical problems. In a fluid flowing in a pipe or “channel,” shear forces between fluid particles and the wall and between the particles themselves result in friction that must be overcome by pumping. Hence, we will first examine the flow pressure drop.