公开(公告)号：US5828715A

公开(公告)日：1998-10-27

申请号：US694667

申请日：1996-08-09

申请人： Hideki Kurosaki ,  Kenichi Ito ,  Masana Sasaki ,  Kensuke Tokunaga

发明人： Hideki Kurosaki ,  Kenichi Ito ,  Masana Sasaki ,  Kensuke Tokunaga

IPC分类号： G21C3/28 ,  G21C21/02 ,  G21C3/00

CPC分类号： G21C21/02 ,  G21C3/28 ,  G21Y2002/201 ,  G21Y2002/302 ,  G21Y2004/10 ,  G21Y2004/30 ,  G21Y2004/40 ,  Y02E30/40

摘要： Fuel rod 2 has a fuel cladding tube 3, and upper end plug 5 and a lower end plug 6 welded to the ends of fuel cladding tube 3. He gas 1 and U pellets 4 are filled in the fuel cladding tube 3. The He gas pressure 1 is about 8 atm, and the average crystal grain size of the U pellet 4 is in the range of 30-60 .mu.m. The fuel rod can be manufactured at a lower manufacturing cost, while maintaining the fuel integrity the same as in a conventional fuel rod.

摘要翻译： 燃料棒2具有燃料包层管3和焊接在燃料包层管3的端部的上端塞5和下端塞6，He气1和U颗粒4填充在燃料包层管3中.He气 压力1约8atm，U颗粒4的平均晶粒尺寸在30-60μm的范围内。 燃料棒可以以较低的制造成本制造，同时保持与常规燃料棒相同的燃料完整性。

公开(公告)号：US5610960A

公开(公告)日：1997-03-11

申请号：US519099

申请日：1995-08-24

申请人： Kensuke Tokunaga ,  Yasuhiro Aizawa ,  Junjiro Nakajima ,  Masana Sasaki ,  Masayoshi Ajima ,  Masafumi Imai

发明人： Kensuke Tokunaga ,  Yasuhiro Aizawa ,  Junjiro Nakajima ,  Masana Sasaki ,  Masayoshi Ajima ,  Masafumi Imai

IPC分类号： G21C3/344 ,  G21C3/356 ,  G21C3/34

CPC分类号： G21C3/344 ,  G21C3/3566 ,  Y02E30/40

摘要： With an arrangement that the axial distance from the upper end of a first opening area to the upper end of the second opening area is equal to the axial distance from the upper end of a first coupling member to the upper end of a second coupling member, when a spring member is moved upwardly relative to round cells, the upper end of the second coupling member comes into contact with the upper end of the second opening area, and the spring members receives upwardly acting forces from fuel elements. The spring member is thereby prevented from inclining with respect to flow of a coolant. Simultaneously, the upper end of the first coupling member contacts the upper end of the first opening area, and the spring member is stably held in a condition where it is aligned with the direction of the coolant flow. Also, since the axial distance from the lower end of the first opening area to the lower end of the second opening area is smaller than the axial distance from the lower end of the first coupling member to the lower end of the second coupling member, the lower end of the first coupling member does not come into contact with the lower end of the first opening area when the fuel element is inserted. Thus, the friction force produced during passage of the fuel member along the spring member is small and the fuel element can be inserted more easily.

摘要翻译： 利用从第一开口区域的上端到第二开口区域的上端的轴向距离等于从第一联接构件的上端到第二联接构件的上端的轴向距离的布置， 当弹簧构件相对于圆形电池向上移动时，第二联接构件的上端与第二开口区域的上端接触，并且弹簧构件从燃料元件接收向上作用的力。 由此防止弹簧构件相对于冷却剂的流动而倾斜。 同时，第一联接构件的上端接触第一开口区域的上端，并且弹簧构件稳定地保持在与冷却剂流动的方向对准的状态。 此外，由于从第一开口区域的下端到第二开口区域的下端的轴向距离小于从第一联接构件的下端到第二联接构件的下端的轴向距离，所以 当燃料元件插入时，第一联接构件的下端不与第一开口区域的下端接触。 因此，燃料构件沿着弹簧构件的通过期间产生的摩擦力小，燃料元件能够更容易地插入。