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Report No.
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Effect of residual tritiated water on air detritiation dryer packed with silica gel

Iwai, Yasunori; Yamanishi, Toshihiko

Silica gel is a desiccant agent of favorable quality for air detritiation dryer incorporated into tritium handling facility. The effect of the residual tritiated water left on the silica gel following regeneration were demonstrated. The residual tritiated water left on the silica gel following regeneration significantly reduced the detritiation factor of air detritiation dryer. To maintain the detritiation factor more than 1000, space velocity lower than 100h$$^{-1}$$ should be selected for the design and operation of air detritiation dryer packed with silica gel. HTO/ H$$_{2}$$O separation factor of multi-cycle was 1.17 on the average. This value is considerably larger than that of multi-cycle evaluated using zeolite as desiccant agent. Silica gel is superior to commercial molecular sieves in dehydration ratio at room temperature. Dehydration from silica gel was dependent on the accumulated amount of purge gas, independent on flow rate. Consequently, silica gel is a promising desiccant agent for air detritiation dryer.

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Category:Nuclear Science & Technology

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