Patent Number: 
Section: claims

1. A nuclear plant, comprising:a containment;a pressure relief line communicating with said containment;a throttle device and a Venturi scrubber connected in series in said pressure relief line, said Venturi scrubber being disposed in a vessel with a washing liquid;said Venturi scrubber and said throttle device being dimensioned to establish, in the event of a critical depressurization of an air/vapor mixture flowing in said pressure relief line and through said throttle device, a flow velocity of the air/vapor mixture of more than 150 m/s in the Venturi scrubber. 2. The nuclear plant according to claim 1, wherein said Venturi scrubber and said throttle device are dimensioned to establish a flow velocity through said Venturi scrubber of more than 200 m/s. 3. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a multiplicity of Venturi tubes having outlets, a comparatively large number of said Venturi tubes are disposed with the respective said outlets above an intended setpoint level of the scrubbing liquid, and a comparatively small number of said Venturi tubes are disposed with an outlet direction directed downward. 4. The nuclear plant according to claim 3, wherein up to approximately 10% of said Venturi tubes are disposed with the outlet direction directed downward. 5. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a plurality of Venturi tubes having a throat cross-sectional area and an inlet cross-section area for the scrubbing liquid, and a ratio of said throat cross-sectional area to said inlet area is less than 10:1. 6. The nuclear plant according to claim 5, wherein said ratio is approximately 3:1. 7. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a plurality of substantially round Venturi tubes with a throat width of less than about 80 mm. 8. The nuclear plant according to claim 7, wherein said throat width of said Venturi tubes is less than about 40 mm. 9. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a plurality of substantially flat Venturi tubes with a throat width of less than about 100 mm. 10. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a plurality of Venturi tubes with a height to throat width ratio of more than 5. 11. The nuclear plant according to claim 1, wherein said Venturi scrubber comprises a plurality of Venturi tubes with a height to throat width ratio of more than 10. 12. The nuclear plant according to claim 1, which further comprises a washing liquid reservoir connected to said vessel on a scrubbing liquid side thereof. 13. The nuclear plant according to claim 1, which further comprises a feedback line connecting a scrubbing liquid side of said vessel to an interior of said containment. 14. The nuclear plant according to claim 13, wherein said feedback line is connected via said pressure relief line to the interior of said containment. 15. The nuclear plant according to claim 14, wherein said vessel is disposed geodetically lying at least approximately 5 m higher than an exit point of said pressure relief line from said containment. 16. The nuclear plant according to claim 15, wherein said vessel is disposed at least 10 m above said exit point. 17. The nuclear plant according to claim 1, wherein the washing liquid in said vessel has a pH of at least 9. 18. The nuclear plant according to claim 1, which further comprises, following said Venturi scrubber in a flow direction, a molecular sieve coated with silver compounds. 19. The nuclear plant according to claim 1, wherein said throttle device is integrated into said vessel. 20. A method for depressurizing a nuclear plant according to claim 1, which comprises subjecting the Venturi scrubber to a flow velocity of the medium carried in the pressure relief line of more than 150 m/s. 21. The nuclear plant according to claim 20, which comprises setting the flow velocity to more than 200 m/s.