| 摘要 |
<p>A pressure vessel, containment or burst shield for a nuclear reactor has a substantially circular cover (closing the top or bottom of a cylindrical casing or shell) comprised of a plurality of layers, each formed from a multiplicity of segments meeting a central part. The adjoining segments of each layer meet at joints which are staggered with respect to the joints of the adjacent layers above or below and hence no continuous crevices are provided through the cover. Tension members extend through aligned passages of the several layers and provide support against shear and thrust forces.</p> |
