| 摘要 |
<p>PURPOSE:To prevent a deterioration of attraction force at the time of fault by connecting a resistance body, non-linear resistance element and blocking rectifier element in series, and connecting them to a coil of magnet in parallel. CONSTITUTION:In a circuit of magnet 1 for attracting a control rod of a nuclear reactor, the blocking rectifier element 8, resistor 10 and non-linear resistance element 7 are connected in series to constitute a discharge circuit 9, which is connected to the coil 3 of magnet 1 in parallel. With this arrangement, the decrease of current flowing to the coil 3 can be prevented by means of making a resistance value of resistor 10 larger even when a function of the element 8 is deteriorated.</p> |
