示踪技术法检测反应堆堆厅气体渗漏率

采用SF₆示踪技术检测某反应堆3个堆厅在常温常压下的气体渗漏率，考察堆厅渗漏气体在主要工作场所的累积效应和到达建筑物内人员疏散通道关键部位的时间和累积强度。结果表明，3个反应堆堆厅在检测条件下的气体渗漏率分别为（7.30±0.16）×10^-4、（1.88±0.12）×10^-4和（2.07±0.07）×10^-4h^-1。堆厅渗漏气体在各工作间以较快速度积累，5h左右在工作间内达到极值，在一楼更衣室内的累积效应明显；堆厅渗漏气体在人员通道的累积幅度较小，约10h达到极值浓度。

Air Leakage Test of Reactor Hall Using Tracer Technique

The leakage ratios of three related reactor halls were tested by sulfur hexafluoride gaseous tracer technique. Moreover, the accumulation intensities of leak gas and its retention time in some important working rooms, the crossroads of corridors and anteroom of the building were detected. The results show that the air leakage ratios of the three reactor halls are （7.30±0.16）×10^-4,（1.88±0.12）×10^-4 and （2.07±0.07）×10^-4h^-1. The leak gas accumulates in all the detected working rooms fast, and the retention time to various rooms is about 5 h. The heaviest intensities are in the clothes change rooms on the first floor. However, the retention time to the crossroads and the anteroom is about 10 h, and the accumulation intensities are much small.