海流及び波力を利用した浮体式海水ウラン採取システムの開発(その2)

概要

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The adsorbent bed system proposed in the 1st report consists of large number of units which are the thin disk cartridges enclosed in nets, and the each unit is arranged below the sea surface in horizontal layers by suspending ropes hung from a buoy. In this paper, the possibility of the following oprating system is discussed. The units filled with fiber ball type-adsorbent are controlled in inclined position aganist sea current by the winches installed on a buoy so that sea current may permeate the units. When the units are collected on the buoy and also rearranged underwater, the units are controlled in horizontal position so as to maintain the smooth operations of system by reducing the horizontal displacement of the units through decreasing the drag forces of units due to sea current. The uranium adsorption test using the model unit reduced to a scale of 1/10 was carried out in the test channel of uniform flow of sea water through 21 days. On the other hand, the flow distribution in the unit was calculated and the uranium adsorption of the adsorbent enclosed in the unit was simulated numerically. A good agreement can be seen between the measured and simulated uranium adsorptions.
社団法人日本船舶海洋工学会の論文