| 摘要 |
<p>1480275 Reactor shields KRAFTWERK UNION AG 2 Oct 1974 [2 Oct 1973] 42843/74 Heading G6C A cyclindrical pressure vessel (e.g. for a nuclear reactor) has a burst-protecting shield coaxially encircling it and comprising top and bottom covers clamped together by long bolts and a side wall formed from rings, the rings extending along the vessel and being formed of layers of sheet material the major surfaces of which extend along and around the vessel. In an embodiment several such rings are provided in each of several overlapping layers and the inner layer is spaced from the pressure vessel wall by concrete for thermal insulation and shock-absorption. A method of providing the vessel/ring combination is described in which a ring is made by winding sheet material on to a rotating former.</p> |
