| 摘要 |
913,654. Nuclear reactors. BABCOCK & WILCOX CO. Feb. 11, 1959 [Feb. 14, 1958], No. 4772/59. Drawings to Specification. Class 39 (4). In a light water-cooled nuclear reactor the coolant system is maintained at a predetermined pressure. Connected to the coolant system is a pressure vessel which may supply water to, or extract water from, the system. The vessel internal vapour pressure is automatically controlled by water level, pressure and temperature-sensing means. The coolant is circulated through the reactor, a heat-exchanger and a boiler by external pumps. Water passes into the pressure vessel from the reactor cooling water inlet pipe, through a spray nozzle controller by a valve adjusted in response to internal vapour pressure. The level-sensing device within the pressure vessel controls a valve admitting water into the coolant system from the vessel. The pressure within the pressure vessel is maintained above the saturation pressure of the coolant system by electric heaters in the base of the vessel adjusted by the pressure-sensing device controlling the flow to the nozzle. Specifications 775,156, 913,653, 913,655 and U.S.A. Specifications re-issue 712,512 and 721,404 are referred to. |
