Kraftwerk Union Aktiengesellschaft

Wolfgang Braun

Leonhard Irion

Hans-Peter Schabert

A water-cooled nuclear reactor pressure vessel is internally provided with a check valve assembly for the inner end of a coolant inlet nozzle to prevent immediate loss of the coolant from the vessel by backward flow in the event the pressure of the coolant supply through the nozzle, drops below the pressure inside the vessel while the reactor is operating. The valve assembly includes a plurality of flap valves working in parallel so that if one fails to close when required, the balance of the flap valves remain operative to check the discharge of the coolant.

Water-cooled nuclear reactor

A pressurized-water reactor coolant system has a main coolant pipe connecting with the reactor pressure vessel through a check valve. A tubular containment is fixed to the pressure vessel and extends over the check valve and connects with the pipe beyond the check valve.

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Erlangen, Germany

Wolfgang Braun