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A critical review of measuring technique based on laser induced fluorescence and its future application in verification and validation of advanced light water reactor simulation     ZHAO Tingjie, TAN Sichao1, WANG Xiaoyu, WANG Ruiqi, and MENG Tao   1. Fundamental Science on Nuclear Safety and Simulation Technology Laboratory, Harbin Engineering University, 150001, Harbin, Heilongjiang, China (tansichao@hrbeu.edu.cn)   Abstract: LIF (Laser Induced Fluorescence) is a non-intrusive, whole-field and instantaneous measurement technique that has been applied in many measurement fields. Embarking from the present research situation, this work presents an introduction of principles and the early application of LIF technique to measuring visual mixing and concentration distribution, temperature fields and liquid film thickness. Analyzing the advantages and disadvantages of the technique, LIF technique can be used as the method of validation and verification of computational fluid dynamic (CFD) models. According to analysis of applicability, LIF technique has a wide range of application. It can measure the temperature fields and observe mixing phenomenon in the rod bundles, boron dilution in the downcomer and the liquid film thickness of containment. In conclusion, LIF technique can verify and validate advanced light water reactor simulation in the future. Keyword: laser induced fluorescence; application; validation and verification; advanced light water reactor
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