利用核技术测定大坝泄洪时的雾化水浓度

MEASURING ATOMIZED-WATER CONTENT AT FLOOD DISCHARGE OF DAM BY NUCLEAR TECHNIQUE

介绍了用核技术测量大坝泄洪时雾化水浓度的工作原理。以￣（２４１）Ａｍγ射线点源和ＮａＩ（Ｔｌ）闪烁体为探测元件构成的探测系统用以测定高含量雾化水浓度；以￣（９０）Ｓｒβ射线平面源和塑料闪烁体为探测元件构成的探测系统用以测定低含量雾化水浓度。同时研究了其室内试验、水雾浓度与测试的γ或β射线计数率关系的标定试验等，并将此技术应用于云南省鲁布格大型水电站大坝泄洪时雾化水浓度的实际测试。

The working principles of nuclear technique for measuring atomized- water content at flooddischarge of dam are discribed.A￣(241) Am point γ- ray source and a Nal(Tl ) scintillatot are used formeasuring higher water content,A ￣(90)Sr planeβ-ray source aiid a plastic scintillator are adopted fordetermining lower water content.In addition, the laboratory calibrating is studied and the experimentdata is assayed.A case study at Lubuge Hydro- power Station in Yunnan Province is presented.