| 摘要 |
1366368 Fuel elements SIEMENS AG 25 Nov 1971 [26 Nov 1970] 54873/71 Heading G6C A fuel element for a pebble-bed reactor comprises a charge of solid fuel contained within a gas-tight can, one or more parts of the can projecting outwards so as to provide one or more free spaces within the can for receiving fission gas, and a spherical perforated container permeable to reactor coolant in which the can is mounted. As shown in Fig. 4, the fuel charge comprises a fuel body 1 encased within a gastight can 2, outwardly extending projections on which serve both to support the fuel charge 1, 2 within the container 3 and to provide pockets for receiving fission gas. In an alternative embodiment (Fig. 3, not shown), the fuel charge 1, 2 is mounted in the container 3 by means of inwardly extending projections on the inside wall of the container. The can 2 and the container 3 are each shown as being made from a pair of hemispherical shells welded together at 5. The container 3 can be made from stamped sheet metal or from wire mesh. The fuel body 1 need not be spherical and, for example, a cubic fuel body may be disposed in an externally spherical container. |
