[3F10-15] Decommissioning of Accident Reactor

[3F14] Development of the radiation resistant remote vibration sensing device for the reactor decommissioning

*Kazuyuki Furuya¹, Shiro Jitsukawa^1,2, Sugita Hisao¹, Takayuki Saito¹, Masahiro Shimoyama², Kazunari Aizawa² (1. NIT Hachinohe College, 2. RADA)

Keywords:Decommissioning, Damage Evaluation, Vibration Measurement, Radiation resistance, Concrete, Degraded area detection

In response to the previous remarks received about the remote microvibrometer for evaluating the integrity of damaged structures, etc., we continuously irradiated the microvibrometer in operation with gamma rays and confirmed that it did not cause any problem in its operation. In addition, sound velocity measurements of concrete specimens containing elements damaged by heating were obtained, indicating the possibility of detecting damaged portions.