Structural Health Monitoring of Nuclear Containment Building Using Fiber Bragg Grating Sensor

Abstract Nuclear containment building is used as second blockage to protect us from a radiation leakage caused by the natural disaster or anyaccidents, so it's safety is important and must be kept with continuous surveillance. In this study, we measured the strain of a nuclearcontainment building's wall by using FBG sensor and investigated the structural safety of a nuclear containment building. 50 FBG strainsensors and 18 FBG strain sensors were attached on the side wall and upper dome of a nuclear containment building, respectively. Wemeasured the strains of the outside concrete wall during the Structural Integrity Test (SIT) of a nuclear containment building. The strain ofan upper dome was larger than that of a side wall, about 200 uo. And the very small strain was measured at vertical direction of a sidewall. These experimental results were used to evaluate the structural health of nuclear containment building. Keywords : Fiber Bragg grating, Nuclear containment building, SIT, Fiber optic sensor