| 摘要 |
<P>PROBLEM TO BE SOLVED: To accurately measure dust radiation density by calculating a bypass leak amount from a filter paper dust collection part with high precision. <P>SOLUTION: A radiation monitoring device includes a sampling pipe 9 which guides sampling gas into a main body part 1 of a dust radiation monitor; a filter paper dust collection part 7a and a radiation detector 8 which are provided to the sampling pipe 9, and collect dust in the sampling gas; a three-way selector valve 10 which is installed in the sampling pipe 9a upstream from the filter paper dust collection part 7a; a first flow meter which is installed in the sampling pipe 9b downstream from the filter paper dust collection part 7a; a pipe 16 in the main body which guides gas in the main body part 1 to the three-way selector valve 10 through a second flow meter; and an arithmetic part 13 which finds the radiation density of the dust collected by the filter paper dust collection part by calculating the bypass leak amount on the basis of measured values of the first flow meter and second flow meter. <P>COPYRIGHT: (C)2013,JPO&INPIT |
