公开(公告)号：US5247551A

公开(公告)日：1993-09-21

申请号：US764585

申请日：1991-09-24

申请人： Leo F. van Swam

发明人： Leo F. van Swam

IPC分类号： G21C3/336 ,  G21C3/344

CPC分类号： G21C3/344 ,  G21C3/336 ,  G21Y2002/101 ,  G21Y2002/104 ,  G21Y2002/303 ,  G21Y2004/30 ,  Y02E30/40

摘要： A spacer sleeve for positioning and restraining a nuclear fuel rod in a nuclear fuel assembly, having a thin walled tubular member having an inner wall and an outer end, and extending a height from a lower end to an upper end and being positioned around the fuel rod to form an unrestricted coolant flow passage along the height of the tubular member, the flow passage having a cross-sectional flow area formed between the fuel rod cladding and the inner wall of the tubular member, and a thin tab extending from the tubular member into the unrestricted flow area and secured to a portion of the cladding of the fuel rod.

公开(公告)号：US4879088A

公开(公告)日：1989-11-07

申请号：US165681

申请日：1988-03-08

申请人： Leo F. van Swam ,  Thomas R. Blair ,  Quang D. Ho

发明人： Leo F. van Swam ,  Thomas R. Blair ,  Quang D. Ho

IPC分类号： G01N29/11 ,  G21C17/07

CPC分类号： G21C17/07 ,  G01N29/11

摘要： Nuclear fuel rods are checked for the presence of water in their interior by injecting bursts of ultrasound radially into the wall of each tube, producing echoing back and forth between the inner and outer surfaces of the tube. The rate of decay of this echoing indicates whether or not water is present.

摘要翻译： 通过将超声波径向注射到每个管的壁中，在其内部检查核燃料棒的存在，在管的内表面和外表面之间来回产生回波。 这种回波的衰减速率表示水是否存在。

公开(公告)号：US4689193A

公开(公告)日：1987-08-25

申请号：US660787

申请日：1984-10-15

申请人： Leo F. van Swam ,  Quang D. Ho

发明人： Leo F. van Swam ,  Quang D. Ho

IPC分类号： G21C17/06 ,  G21C17/07 ,  G21C17/00

CPC分类号： G21C17/06

摘要： A mechanism for testing fuel tubes in nuclear fuel bundles includes a carriage, carrying an elongated probe, and a grooved plate. The grooves are parallel to the probe and are spaced by the same distances as rows of tubes in the fuel bundle. They are connected at at least one end. A pin on the carriage fits in the grooves. A hydraulic cylinder reciprocates the carriage longitudinally of the grooves and a pneumatic cylinder urges it laterally, so that the pin moves from groove to groove at the end of each stroke.

摘要翻译： 用于测试核燃料束中的燃料管的机构包括承载细长探针的滑架和带槽板。 凹槽平行于探头并与燃料束中的管排间隔相同的距离。 它们至少在一端连接。 滑架上的销钉插入槽中。 液压缸使托架在槽的纵向上往复运动，并且气缸将其横向推动，使得销在每次行程结束时从槽移动到槽。