| 摘要 |
PURPOSE:To stably and continuously measure the quantity of radiation of radioactive dust in incineration waste gas containing corrosive gas by using a dust collecting member consisting of the continuous filter paper which uses ethylene tetrafluoride resin and an anticorrosive material. CONSTITUTION:The continuous filter paper 4 wound around filter paper drums 8a and 8b tensed by a tension wire 7 is supplied to a dust collecting head 2 through a guide roller 6 in a dust collection box 1 through the driving of the head 2. Then a radiation detector 3 measures the quantity of the radiation of the radioactive dust in the gas to be measured with the sucking force of the head 2. At this time, the inside of the box 1 is coated with anticorrosive resin and the rollers 5 and 6 and the bearings of drums 8a and 8b are made of anticorrosive resin; and the wire 7 is made of anticorrosive alloy and the continuous filter paper 4 made of ethylene tetrafluoride resin is used. Thus, the breakage, etc., of the device due to corrosion is eliminated against incineration gas containing hydrogen chloride gas, etc., and the measurement can be carried on continuously.
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