热态反应性实时监测及重水堆光激中子本底源的确定

HOT-STATE REACTIVITY REAL-TIME MONITORING AND THE DETERMINATION OF PHOTONEUTRON BACKGROUND SOURCE IN HEAVY WATER RESEARCH REACTOR

在反应堆运行过程中,实时监测堆内反应性的大小,对于保证反应堆的安全具有十分重要的意义。为此,我们发展了一用于实时监测热态反应性大小的FORTRAN程序,并在重水研究性反应堆(HWRR)上进行了实验。实验证明该程序能够实现热态反应性的实时监测。此外,我们还从对正常运行状态下的实时反应性值的统计分析得到了光激中子源本底的大小,为确定重水堆光激中子源大小提供了一个新的方法。实验结果表明,在正常闭环运行状态(11000kW)下,重水研究性反应堆(HWRR)的光激中子源本底的反应性当量为+1.09×10^(-3)＄。

During the operation of nuclear reactor, it is important to monitor the reactivities at real-time for the safety of reactor. A FORTRAN computer program it developed for this purpose and experiments are done at the Heavy Water Research Reactor (HWHR) for testing. Besides, relevant reactivity of photoneutron background source is got from the statistics analysis of the real-time reactivities at the normal operation state. A new method is provided for the determination of the photoneutron background source in Heavy Water Reactor. The experimental results show that at the normal operation state, the relevant reactivity of photoneutron background source in HWRR is + 1.09×10^(-3)$.