E212 水面に飛び込み水噴流による気泡キャリーアンダに関する研究(沸騰と噴流,OS8 軽水炉・新型炉・核燃料サイクル)

抄録

When liquid flows down into a liquid pool as a jet flow or a film flow on a wall, it sometimes accompanies gas into the pool. If the penetrated gas drifts up and leaves from the pool surface, the phenomenon is harmless. However, when the pool is highly agitated or strong flow exists from the pool, the mingled gas in liquid is carried out from the pool. The mixed gas in the coolant may reach the reactor core such as the light water reactor or the fast bleeder reactor. It severely affects the reactivity. Thus, the carry-under of gas into the water pool by the liquid down-flow is important issue for nuclear reactors. In the present study, air carry-under into the water pool is examined in visually approach.