| 摘要 |
PURPOSE:To obtain an efficient radioactive dust sampler low-cost and compact with an installation space by performing a measurement in parallel with a multi- system dust sampling to enable the movement of a filter paper independently of the one collecting dust. CONSTITUTION:This radioactive dust sampler are composed of sampling pipings 5a-5n, flowmeters 6a-6n, pressure compensated flow control valves 7a-7n, a sampling pump 8 and dust collectors 1a-1n. One end of the sampling pipings 5a-5n are opened in the sampling area while the other end thereof are connected to the dust collectors 1a-1n to collect dust on a long-sized filter paper 3a. The filter paper 3a is fed from a filter paper supplying section 4a and after a dust collection with the dust collectors 1a-1n, it is separated from the supply side of the long-sized filter paper with a cutter 21 set along a filter paper moving path to be fed to the position opposite to a detector 2 with a filter paper feeder 23. Thus, the collected dust samples 9a-9n adsorbed on the filter paper 3b thus cut are measured sequentially and the filter paper fed to a filter paper storage container 22 and stored therein after the end of a measurement. |
