蒸汽发生器二次侧^(16)N传输时间分析

Research on the Transporting Time of ^(16)N in the Secondary of the Steam Generator

蒸汽发生器的传热管泄漏可以通过安装在主蒸汽管道上的16N监测仪发现,该系统确定泄漏率的一个重要参数是16N核素在蒸汽发生器二次侧的传输时间。采用RELAP5程序及自编程序两种方法,对百万千瓦级M310型机组55/19B型蒸汽发生器二次侧16N传输时间进行了计算,两种方法的计算结果基本一致,相互验证,不仅为传热管泄漏探测提供重要参数,而且也为蒸汽发生器传热管检修提供可靠依据。

The leakage of steam generator tubes can be detected by the 16N detector placed on the outside of the main steam line pipe. One of the important parameters of this detecting system is the transporting time of the nuclidel6N from the leaking spot to the detector. The paper use two methods, the RELAP5 code and the self- developed code, to calculate the transporting time of the 55/19B type steam generator. The results of two ways are very similar, mutual proved and can be used for the detecting system and the maintaining works.