Patent Number: 
Section: claims

1. An apparatus for transferring an article comprising:a fluid-filled first vessel and a fluid-filled second vessel, each having an interior;a connecting element connecting the interiors of said vessels and having first and second issues and an extraction point between said first and second issues, the fluid flowing into said connecting element from said first vessel at said first issue toward said extraction point and the fluid flowing simultaneously into said connecting element from said second vessel at said second issue toward said extraction point under certain system conditions;a transport device for moving the article through said connecting element; andan extraction device collecting discharged fluid discharged from said connecting element, said extraction device being directly connected to said connecting element at said extraction point located between said first and second issues. 2. The apparatus according to claim 1, wherein said extraction device includes a measuring and regulating device for measuring and setting an extraction flow intensity. 3. The apparatus according to claim 1 further comprising:a collecting vessel for receiving the discharged fluid. 4. The apparatus according to claim 1, wherein the extraction device includes an apex point and an extraction line leading upward as far as said apex point. 5. The apparatus according to claim 4, wherein said apex point is below a fluid level in one of said vessels. 6. The apparatus according to claim 1, wherein:said connecting element has a first issue or mouth in said first vessel; anda first pressure measuring device measures a first pressure in said first vessel level with said first issue or mouth. 7. The apparatus according to claim 6, wherein:said connecting element has a second issue or mouth in said second vessel; anda second pressure measuring device measures a second pressure in said second vessel level with said second issue or mouth of said connecting element. 8. The apparatus according to claim 7, further comprising:an evaluation unit connected to said first pressure measuring device and said second pressure measuring device determining the pressure difference between the first pressure and the second pressure. 9. The apparatus according to claim 1, wherein said first vessel is a fuel element storage pond a nuclear power station and said second vessel is a reactor pit of said nuclear power station. 10. In combination with a preparation plant, the apparatus according to claim 1, further comprising:a line conducting the discharged fluid to the preparation plant, in which water contained in the discharged fluid is separated from a boron-containing substance contained in the discharged fluid. 11. The apparatus according to claim 1, wherein:said first vessel has a first inflow into said first vessel, a first metering valve is mounted at said first inflow, and a predeterminable first fluid flow is set through said first metering valve. 12. The apparatus according to claim 11, wherein:said second vessel has a second inflow into said second vessel, a second metering valve is mounted at said second Inflow, and a predeterminable second fluid flow is set through said second metering valve.