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公开(公告)号:US5920603A
公开(公告)日:1999-07-06
申请号:US016903
申请日:1998-02-02
申请人: Jack T. Matsumoto , Alex B. Fife
发明人: Jack T. Matsumoto , Alex B. Fife
CPC分类号: G21C5/06 , G21Y2002/103 , G21Y2002/104 , G21Y2002/204 , G21Y2002/302 , G21Y2004/305 , G21Y2004/40 , Y02E30/40
摘要: A forged core plate fabricated from a single piece stainless steel forging is described. The plate has a substantially circular shape and penetrations are provided in the core plate to allow passage of control rod blades into the core and direct recirculation flow past the fuel assemblies. The penetrations are formed from machining "5 holes" per penetration. Particularly, each penetration includes a center through hole to allow passage of the control rod blade and control rod blade guide tube. The through hole has a smaller diameter at the plate top surface to provide a tighter fit to the outside diameter of the guide tube to maintain alignment and minimize flow leakage. The through hole is enlarged at the core plate bottom surface to allow clearance in order to improve the installation and removal of the guide tube. Each penetration also include four peripheral blind holes to direct the recirculation flow into the flow holes located on the sides of the guide tube. The blind holes do not extend completely through the plate. When the guide tube is installed in the core plate, the flow holes in the side of the guide tube is located approximately 1/3 of the way down from the plate top surface.
摘要翻译: 描述了由单件不锈钢锻造制造的锻造芯板。 该板具有基本上圆形的形状,并且在芯板中设有穿孔以允许控制杆叶片进入芯体并且直接再循环流经燃料组件。 穿透通过每次穿透加工“5孔”形成。 特别地,每个穿透包括中心通孔,以允许控制杆叶片和控制杆叶片引导管通过。 通孔在板顶表面处具有较小的直径,以提供与引导管的外径更紧密的配合,以保持对准并使流量最小化。 通孔在芯板底面处扩大以允许间隙,以改进导管的安装和拆卸。 每个穿透还包括四个外围盲孔,用于将再循环流引导到位于导管侧面的流动孔中。 盲孔不能完全穿过板。 当导管安装在芯板中时,导管侧面的流动孔位于从板顶表面向下的大约+ E,fra 1/3 + EE。