| 摘要 |
PROBLEM TO BE SOLVED: To provide the selection/removal system of radioactive contaminated aggregates for performing the final check of a radioactive contamination level before using aggregates even at the reception side of aggregates, and for selecting and removing radioactive contaminated aggregates such that the aggregates contaminated or suspected of being contaminated with radioactivity are prevented from being used as they are.SOLUTION: In a high order of a supply conveyer 4 for aggregate conveyance installed in an asphalt mixture manufacturing plant or concrete manufacturing plant or the like at the reception side of aggregates, a scraper 5 for placing and spreading the aggregates under conveyance with predetermined layer thickness for adjustment and a radiation detector 6 for continuously detecting the radiation dose of the aggregates and a channel switching damper 7 for selecting/removing radioactive contaminated aggregates by changing the channel of the aggregates under conveyance when the radiation dose in a predetermined level or more is detected are disposed. Thus, it is possible to check whether or not the received aggregates are contaminated with radioactivity in a stage prior to use without omission, and to avoid such an unexpected situation that the aggregates suspected of being contaminated are used as they are. |
