| 摘要 |
Nuclear fuel elements (30) are tested for leaks as they are removed from a building in which they are made. An element is loaded through a door into a compartment in the building wall. The door is closed and the compartment is evacuated. A particle detector senses any leakage from the element. If no leakage is detected, the element is discharged through a second door (26). If leakage is sensed the element is passed back through the first door (24). The method may be used to test sheathed uranium fuel elements pressurised with helium.
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