| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a nuclear power plant inspection apparatus capable of suitably performing replacement of an imaging apparatus. <P>SOLUTION: A camera unit 6 in the nuclear power plant inspection apparatus includes two CCD cameras 21, 31, a shield plate 22, driving motors 32a, 32b for moving the shield plate 22, and shield plate driving wires 33a, 33b. The shield plate 22 covers the front of the CCD camera 31 and photographing up to inspection time is performed by the CCD camera 21. A dosage rate of radiant rays made incident on the CCD camera 21 is found out based on the number of pixels of radiation noise included in an image obtained by photographing using the CCD camera 21, and a cumulative dose of the CCD camera 21 is found out by integrating the dosage rates. When the found cumulative dose exceeds a set cumulative dose, a control unit 34 rotates the driving motors 32a, 32b and moves the shield plate 22 up to the front of the CCD camera 31. <P>COPYRIGHT: (C)2013,JPO&INPIT |
