| 摘要 |
1,044,639. Reactors. EUROPEAN ATOMIC ENERGY COMMUNITY (EURATOM). July 30, 1963 [July 30, 1962], No. 30207/63. Heading G6C. A nuclear reactor has a core through which extends at least one pressure tube, which projects beyond the upper and lower faces of the core, mounting means for the pressure tube in the form of a sleeve secured to the upper surface of the core and spacedly surrounding the upper end of the pressure tube, means holding the upper end of the pressure tube in fluidtight engagement with the sleeve, and the sleeve extending upwards beyond the open upper end of the pressure tube through which a fuel element is loaded; coolant fluid is circulated between the sleeve and pressure tube, and there is also a lower tube connector comprising a sleeve surrounding the lower end of the pressure tube and secured to the lower surface of the core, the annular gap between the sleeve and tube being sealed to permit relative axial telescopic sliding of the two. The upper sleeve 1 is secured to the top core plate 2, and the fuel element 7 (Fig. 2) is attached to a rod 6 hung from a plug 5 in an extension 4 of the upper sleeve. Organic fuel coolant liquid enters through a port 8, and is circulated between the pressure tube 3 and a tubular sheath 9 and leaves by tube 70. A flow of heavy water is directed through the upper surface coupling through pipe 32 and through the lower coupling through pipe 62 into the reactor tank 13. A thermal insulating gas flows in the annular space between tube 30 and sheath 9. |
