| 摘要 |
<p>981,423. Cooling reactors. UNITED KING- DOM ATOMIC ENERGY AUTHORITY. May 17, 1961 [June 9, 1960], No. 20403/60. Heading G6C. Fuel elements of a boiling water reactor are separated from the reactor coolant by a fluid heat transfer medium; the medium is contained separately from but is surrounded by and in heat transfer relation with the coolant. The Figure shows a reactor in which each tube 15 contains three sheathed fuel elements and water which is circulated by pumps 24; the fuel elements are spaced by helical wires and are arranged differently in successive tubes to promote turbulence. Outside tubes 15 is the reactor coolant, which is also water. Alternatively, the medium inside the tubes may be CO 2 or an organic liquid. External circuits may be added for purification of the medium and for introduction into tubes 15 of neutron absorbing poison substances for control. The tubes may be divided into inner and outer zones, the inner being used to superheat steam generated in the outer. The tops of the tubes are detachable and include spring washers to hold the fuel down. Specification 981,426 is referred to.</p> |
