3532 軽水炉のシビアアクシデント時における気泡急成長による水撃力(S49-4 流動,原子炉用機器(3),S49 原子炉システムおよびその要素技術)

概要

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We investigated the water hammer caused by striking of water mass pushed up by a rapidly growing bubble and its scale effects using three cylindrical model containment vessels of 0.428, 1.0 and 2.0m diameters. We also closely observed the movement of water mass and the growing bubble in the vessels. In these experiments, rapid bubble growth was simulated by injecting high-pressure air into a water pool. It was clarified that the water mass was pushed up without any air penetration until the water level reached a certain elevation. The acceleration of the water mass was almost constant. On the basis of all data, scale effect of the vessels and the water hammer pressure for exerting large forces on the structures were quantitatively evaluated.
2005-09-18