CANDU堆热工水力设计方法和计算机软件

Thermalhydraulic Design Methods and Computer Codesfor CANDU Reactor

ＣＡＮＤＵ 堆热工水力设计采用目前一些典型的分析方法， 并通过一些重要的实验研究计划对这些典型的分析方法进行强化支持。这些研究计划是为了发展和验证数学模型。主要针对ＣＡＮＤＵ 堆特有的热工水力学（ 燃料通道流动和压降、临界热流密度、热传输系统的喷放和再注水特性； 慢化剂系统中的流动和温度分布； 安全壳系统的热工水力学） 。本文介绍ＣＡＮＤＵ 堆设计所用的计算机模型， 以及为确认其结果而进行的一些实验和理论验证。

Methods used for thermal and hydraulic design are typical of those available in the world,enhanced by major experimental programs.These programs are used to develop and confirm mathematical modelling.In particular,experiments are concentrated on modelling of CANDU specific aspects of:1)thermalhydraulics,such as channel flowe and pressure drop,critical heat flux,blowdown and refill behaviour in the heat transport system;2)flow and temperature distribution in the moderator system;and 3)thermalhydraulics in the containment safety system.Both steady state and transient conditions are included.This paper describes computer modelling approaches used for design along with the experimental and theoretical verification programs which confirm the results.