| 摘要 |
A passive "core catcher" is provided for preventing the escape of radiation in the unlikely event of a major failure of a nuclear reactor by melt-down of the core. The "core-catcher" structure includes a narrow vertically downwardly extending isolation tube (18), and aligned narrow heat-exchange structure (36, 38) forming a chilled wall crucible in which the molten uranium oxide forms a container for itself including a "frozen" or solid layer of uranium oxide adjacent the heat exchanger wall. A passive cooling system may include a water tower (54) adjacent the above-ground reactor structure (12), which dissipates heat from the core-catcher heat exchanger, and from within the above-ground reactor structure by a second local heat exchanger (72, 74, 76). |
