The UD-48A’s unique design allows for the demineralizer to be operated underwater and under negative pressure.  This design feature eliminates the need for special bolted pressure closure on the pump housing requiring tooling for operation.  The pump housing seals with a simple flat cover plate held in place by negative pressure during operation.

Unfiltered water enters the UD-48a via one 4”, 15mil slot safety screen on the top of the vessel.  The water then travels through the demineralizer bed to the 7 mil outlet let screen elements, then through a 15 mil outlet safety screen,  to the suction of the UD-48A pump and out the discharge of the pump.  There is a standard 2” x 25’ hose attached to the discharge of the pump to ensue proper cross circulation of water away from the UD-48A.

The UD-48A also has top camlock connections for sluicing in and out of resin.  The resin can be sluiced while the unit is underwater.

Basic Operation

During refueling outages at some nuclear power stations, it has become necessary to process reactor cavity water rapidly to reduce radiation levels.  Tri Nuclear Corp.  has developed an underwater 48” demineralizer which meets this need.

· Vessel operates on negative pressure

· High Flow Rate – 200 GPM

· 50ft3  resin capacity (supplied by customer)

· Cam-lock connections for quick system hookup

· Inlet & Outlet Safety Screens designed to prevent resin migration

· Underwater service requiring no additional shielding

· Self contained system