Thermal-Hydraulic Calculation and Water Hammer Analysis on CEFR Loop System

摘要

China Experimental Fast Reactor(CEFR) is one of the "863" High-Technical Projects. It is necessary to study the hydraulic and thermal Characteristic of CEFR loop system in order to guarantee the safety of operation. The results of the thermal-hydraulic calculation have been given in this paper. The main points are as follows: 1. The simplified model is built according to the loop system of CEFR, and the calculation method which is called "NODE"-"BRANCH" is applied. This method includes two aspects, one is the theoretical analysis that is based on fluid mechanics and heat transfer theory. The other is the engineering calculation. These two aspects are connected in the computation. On the basis of the work mentioned above, the stable state computation is presented. In order to prevent serious damage caused by power failure accident, the courses of surplus reactor heat removing through two differnet systems have been simulated in the computation. 2. By using the fluid dynamics theory, the simplified model and the equipment boundary conditions of loop system are given in the paper. The water hammer computation is processed during the valve closing and pump stopping accidents. Some pictures of water hammer wave are presented, and the most dangerous state in the accident is also given.