Apparatus for sealing a rotatable shield plug in a liquid metal nuclear reactor

摘要

An apparatus for sealing a rotatable shield plug in a nuclear reactor having liquid metal coolant. The apparatus includes a dip-ring seal adapted to provide a fluid barrier between the liquid metal and the atmosphere and to permit rotation of the shield plug. The apparatus also includes a static seal for the rotatable shield plug located between the dip-ring seal and the liquid metal. The static seal isolates the dip-ring seal from the liquid metal vapor during operation at power and can be disengaged for rotation of the shield plug.