| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a vibration measurement technology for a structure in a reactor that is easily attachable in a narrow space, and has an ultrasonic sensor that is fixed on the outer surface of a pressure vessel and operates for a long time under a severe circumstance. <P>SOLUTION: A vibration measurement device 10 comprises: a holder 20 that has an aperture 21 on a side thereof that attaches tightly to a surface of a pressure vessel 60 of a reactor; a vibrator 30 that is accommodated in the holder 20 and transmits/receives an ultrasonic wave; a power plant 11 that is packed in the holder 20; and a biasing member 12 that biases the vibrator 30 in the aperture 21 direction. The power plant 11 is a solid in room temperature and a metal material that melts by the heat transfer from the pressure vessel 60. <P>COPYRIGHT: (C)2012,JPO&INPIT |
