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1. 发明授权

US5030413A Core internals of a water-cooled nuclear reactor 失效
标题翻译：水冷核反应堆的核心内部
公开(公告)号：US5030413A
公开(公告)日：1991-07-09
申请号：US441889
申请日：1989-11-27
申请人： Leonhard Knierriem , Franz Potz , Heinz Franke
发明人： Leonhard Knierriem , Franz Potz , Heinz Franke
IPC分类号： G21C5/06
CPC分类号： G21C5/06 , Y02E30/40 , Y10T403/4924 , Y10T403/4983
摘要： Upper and lower core structures of core internals carry a plurality of centering pins which have free ends protruding into recesses in a fuel assembly endpiece. In the case of the upper core structure in particular, the nuts for fixing the centering pins are difficult to access in the event of a subsequent exchange of pins. Therefore, core internals which do not require a nut for securing on the centering pins are preferred. For this purpose, a centering pin is provided with a center bore passing through it. The ends of the center bores facing away from the fuel assemblies are in the form of conically tapering stepped bores. Each stepped bore has a plug which is displaceable in axial direction relative to the centering pin. The peripheral surface of the plug is conically formed in the same direction and with the same pitch as the stepped bore. The centering pin enters into a play-free fitting connection with a bore in a grid plate. The peripheral surface of the centering pin is provided with a grooving at the level of the stepped bore, which enters into a form-locking connection with the wall of the bore in the grip plate, after relative movement of the plug and the centering pin has taken place.
摘要翻译：核心内部件的上部和下部芯部结构承载多个定心销，其具有突出到燃料组件端部件中的凹部中的自由端。在特别是上芯结构的情况下，用于固定定心销的螺母在随后的销的更换的情况下难以接近。因此，优选不需要用于固定在定心销上的螺母的芯部内部。为此，定心销设置有穿过其的中心孔。中心孔的远离燃料组件的端部呈锥形锥形的阶梯孔的形式。每个阶梯孔具有可相对于定心销在轴向上移位的塞子。插塞的周边表面以与阶梯孔相同的方向和相同的间距圆锥形地形成。定心销进入与网格板中的孔的无游隙配合连接。定心销的圆周表面在阶梯孔的水平面处设置有切槽，其在塞子的相对运动之后进入与夹持板中的孔的壁的形状锁定连接，并且定心销具有发生在。

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