| 摘要 |
<p>An isolation valve particularly well suited for use in nuclear reactor hydraulic control systems is disclosed. The valve includes an electro-magnetic actuator which may be energized to open the valve thereby permitting the lift flow needed to move fission rate control devices with respect to a fuel assembly. The fission rate control devices are provided with elements comprised of magnetic material which, with the devices fully retracted from the fuel assembly, will be positioned within the magnetic field generated by the valve actuator whereby the devices will be magnetically held in the retracted position.</p> |
