| 摘要 |
PURPOSE:To improve reliability by switching a pump which is not damaged to the reverse operation during liquid feeding OFF operation, thus preventing the liquid feeding ON-OFF function from being lost by a single damage. CONSTITUTION:When an electromagnetic pump 1 is damaged and ON-operation state is fixed, a pump control circuit 8 sends reverse operation signals into the electromagnetic pumps 1 and 2. The electromagnetic pump 2 performs suction operation. Since the liquid pumped-up by the electromagnetic pump 1 is returned into a liquid metal storing tank 3 through a pipe 9, said liquid is not pumped-up into an atomic pile 4 through a pipe 8. Afterwards, during the time when the electromagnetic pump 1 continues ON-operation, the same operation is repeated. Therefore, even if the electromagnetic pump 1 is damaged and ON-operation continues, the liquid feeding ON-OFF operation can be maintained in the whole system. |
