| 摘要 |
<p>PURPOSE:To detect the leakage from an iodine removing filter by using the gas of a material having physical adsorption property, by flowing the gas under the state small holes, which have adsorption activity for the condensating gas of silver zeolite, remain. CONSTITUTION:A treating gas is flowed in an iodine filter housing 1. The treating gas is heated by a heater 2. The ratio between steam pressure P and saturated steam pressure Ps in an atmosphere is made to be 0.2 or less. Under this state aeration is performed for a specified time period, e.g., for 0hr when the silver zeolite does not absorb the water and about 10hr when the silver zeolite absorbs the water to the extent of 0.11cm<2>/g. Thereafter Freon is introduced from a Freon generator 4 together with a carrier gas such as air. After the introduction is stabilized, part of the aeration gas is introduced to a Freon concentration measuring device 5 from the upstream side and downstream side of a silver zeolite filled filter 3, the Freon concentration is measured, and the leakage rate is computed.</p> |
