LEAKAGE DETECTING DEVICE FOR HIGH EFFICIENCY FILTER

摘要

PURPOSE:To efficiently identity the leakage spot of filter by throwing test fine particles into the front side of a high efficiency filter and scanning the back side of the filter to project light to the leaked particles and collecting the light reflected by the test fine particles. CONSTITUTION:The test fine particles B are thrown into the front side of the high efficiency filter 2 through a throwing-in nozzle 6. Two light sources 3a, 3b scan the back surface of the filter 2 to project the light to the test fine particles B leaking from the filter 2. A converging lens 4 and a photomultiplier 4' collect the light 3c reflected by the fine particles B. As a result, the work efficiency is improved and the health of workers in secured in safety. When the equipment to be tested with the leakage test is in an nuclear power plant, or in nuclear fuel treatment facilities, the radioactive ray receiving quantity of a worker is reduced. Moreover, the leakage test of high efficiency filter is swiftly carried out without shortening the life of the sound high efficiency filter.