Study on Nuclear Reactor Instrumentations by Optical Techniques

光纤微裂纹检测及其研究进展。抗辐射性能是本研究的目的。本研究的后半部分是利用SNOM和AFM器件进行的，该结果不会因SNOM故障而失败。前者在“YAYOI”（东京大学）和“JOYO”（JNC）的研究堆中都铺设了光纤光栅，用于检测辐射照射下的微裂纹。可以得到光纤光栅的振动数据，但对其功率谱的解释略有不同，并且在本实验中没有实现微裂纹。残余问题是对这些实验中得到的振动数据作出清晰的解释。

Micro crack detection by fiber optics and developments on its.anti-radiation property are the aims of this study. And the latter part of this study are made using the devices of SNOM and AFM, that result can not be obtained unsuccessfully by the SNOM trouble. For the former part, FBG has been laid in the both research reactors of "YAYOI"(University of Tokyo) and of "JOYO"(JNC), to detect the micro crack under radiation irradiation.The vibration date of FBG can be obtained, but the interpretation of their power spectra is a little different, and the micro cracks did not realized in the present experiment.The residual problem is to make a clear explanation of the vibrational data obtained in these experiments.