| 摘要 |
1,149,480. Fuelling reactors. WESTING- HOUSE ELECTRIC CORP. 29 March, 1968 [7 April, 1967], No. 15122/68. Heading G6C. A sodium-cooled reactor having a core 14 in a vessel 12 is refuelled by a machine 28 disposed in a cell 10, this machine being placed in position after removal of a shield plug 18 acting as the vessel cover. The space above the sodium level 20 is filled with an inert gas 24 and the space 11 of the cell 10 is similarly filled. To prevent sodium vapour escaping from the vessel 12 into the space 11 when the plug 18 is removed a circulation of inert gas is maintained across the opening 26 formed by the plug removal. This gas is supplied by distributers 32 connected through conduits 44, 47 to the downstream side of a blower 35 and is withdrawn by collectors 34 connected through conduits 42 connected to the upstream side. The gas circuit includes a cooler 38, purifier 39 and filter 40. Conduit branches 41, 46 connected to inlets 36 and outlets 37 serve to maintain circulation of the atmosphere in space 11.
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