| 摘要 |
Illustrative embodiments of the invention are directed to the structure within a pressure vessel for a nuclear reactor. Sealing rings are placed against the seats of the pressure vessel discharge nozzles. These rings are field-fastened to the structure through distortionless electron beam welding. These seals are flexible and do not apply uncontrollable stresses to the pressure vessel while establishing a leak-tight condition between the inlet and outlet coolant flow at any anticipated reactor temperature. This invention eliminates the usual core barrel and pressure vessel machining operations and, additionally, insures the necessary leak-tight joints at working temperatures.
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