| 摘要 |
1,167,488. Reactor pressure vessels. ROLLS-ROYCE Ltd. 17 July, 1968, No. 33975/68. Heading G6C. In a prestressed concrete pressure vessel for a nuclear reactor power plant, the vessel 110 is closed by the prestressed concrete lid 130, secured to 110 by the prestressing cables 124. The cables engage the lid 130 through the member 136 and split collet 138. Within the vessel, the cylindrical pod 112, which contains the power plant, is welded to the flange 120 in the recess 121. The steel liner 122 is welded to the flange 123. To remove lid 130, the cables 124 are extended and the collets 138 removed. The members 136 can pass through the holes 132 when the lid is lifted. The length of the tubes 134 is chosen so that when the members 136 abut their ends, the cables 124 are at twothirds the maximum tension. The pressure vessel 110 is thus under compression when 130 is removed. |
