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35 条记录 (耗时 0.011 秒)

    Sintering of sol-gel material
    4.
    发明授权
    Sintering of sol-gel material 失效
    固溶胶材料的烧结

    公开(公告)号：US3846520A

    公开(公告)日：1974-11-05

    申请号：US25403872

    申请日：1972-05-17

    申请人： REACTOR CENTRUM NEDERLAND

    发明人： BRUIJN E ,  ROOY R ,  HAMBURG F ,  KANIJ J

    IPC分类号： G21C3/62 ,  G21C21/00

    CPC分类号： G21C3/623 ,  Y02E30/38

    摘要： The invention relates to an economic method for sintering spherical sol-gel material. Spherical hexavalent oxidic uranium material, such as A.D.U. or UO3-hydrate, is converted into nuclear fuel of high density by means of a sinter stage, which consists in heating-up and cooling at a rate of 10* - 65* C/min. The sinter stage may be preceded by a preheating stage. Whereas the starting material may contain finely divided carbon. Previously only spherical sol-gel material of tetravalent uranium and pressed compacts of ceramic uranium dioxide powder where sintered with the above heating rates. Tetravalent uranium material has disadvantages with respect to hexavalent uranium material.

    摘要翻译： 本发明涉及一种烧结球状溶胶 - 凝胶材料的经济方法。 球形六价氧化铀材料，如A.D.U. 或UO3水合物，通过烧结阶段转化成高密度的核燃料，其包括以10〜65℃/分钟的升温速度冷却。 烧结阶段之前可以有预热阶段。 而原料可能含有细分碳。

    Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging-process
    5.
    发明授权
    Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging-process 失效
    在交换过程中获得部分的圆柱形元件的间隙网格弹性板弹簧

    公开(公告)号：US3801088A

    公开(公告)日：1974-04-02

    申请号：US3801088D

    申请日：1971-04-16

    申请人： REACTOR CENTRUM NEDERLAND

    发明人： PIEPERS G ,  VONS L ,  LJBRINK E

    IPC分类号： F28F9/013 ,  G21C3/356 ,  F16F1/22

    CPC分类号： F28F9/0135 ,  G21C3/356 ,  Y02E30/40

    摘要： A plate spring for use in a spacer grid for holding a rod-like element against lateral displacement, by exerting a pressure force on the element in a direction normal to the plane of the plate spring, said plate spring having a longitudinal dimension and a transverse dimension within said plane and when in the relaxed state having a bow-shaped bend in one direction in its major middle part for engagement with the rod-like element said spring further having between said bow-shaped bend and each end of the spring an arch extending in the same direction as said bend, at least one end of the spring being formed in at least two longitudinally extending branched parts which are transversely spaced apart.

    摘要翻译： 一种板簧，用于通过在垂直于板簧的平面的方向上对元件施加压力而保持杆状元件抵抗横向位移的板状弹簧，所述板簧具有纵向尺寸和横向 并且当处于松弛状态时，在其主要中间部分中具有一个方向的弓形弯曲部，用于与杆状元件接合，所述弹簧还具有在所述弓形弯曲部和弹簧的每个端部之间的拱形 沿与所述弯曲部相同的方向延伸，弹簧的至少一端形成为横向间隔开的至少两个纵向延伸的分支部分。

    Air-excluding spot-welding method for making heat-exchange grid
    6.
    发明授权
    Air-excluding spot-welding method for making heat-exchange grid 失效
    用于制造热交换网的空气排除点焊方法

    公开(公告)号：US3789184A

    公开(公告)日：1974-01-29

    申请号：US3789184D

    申请日：1971-04-16

    申请人： REACTOR CENTRUM NEDERLAND

    发明人： PIEPERS G ,  VONS L ,  AART VAN DER LINDE ,  LJBRINK E

    IPC分类号： F28F9/013 ,  G21C3/356 ,  B23K11/10 ,  B23K11/16 ,  F28F9/00

    CPC分类号： G21C3/356 ,  F28F9/0135 ,  Y02E30/40

    摘要： A method for spot welding Zircalloy straps in open air to form a heat-exchange grid for holding a plurality of rod-like elements against lateral displacement. Contiguous areas of the straps are clamped between spot-welding electrodes and immediately thereafter the clamped areas are sprayed with a non-viscous volatile liquid, preferably a pure organic compound free of sulfur, fluorine, chlorine and iodine, such as acetone or ethanol. Heated by the welding current, the liquid volatilizes to expell air, thus preventing weakening of the weld by absorbed nitrogen or oxygen.

    摘要翻译： 一种在露天中点焊Z合金带的方法，以形成用于保持多个杆状元件抵抗横向位移的热交换栅。 带状物的相邻区域夹在点焊电极之间，此后，夹紧的区域用非粘性挥发性液体，优选无硫，氟，氯和碘的纯有机化合物如丙酮或乙醇喷雾。 通过焊接电流加热，液体挥发以排出空气，从而防止吸收的氮气或氧气使焊缝变弱。

    Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging process
    7.
    发明授权
    Spacer grid respectively plate spring for a bunch of cylindrical elements taking part in a heat-exchanging process 失效
    在交换过程中获得部分的圆柱形元件的间隙网格弹性板弹簧

    公开(公告)号：US3646994A

    公开(公告)日：1972-03-07

    申请号：US3646994D

    申请日：1969-12-23

    申请人： REACTOR CENTRUM NEDERLAND

    发明人： PIEPERS GIJSBRECT G ,  VONS LEONARD H ,  LINDE AART VAN DER ,  LIJBRINK EDVARD

    IPC分类号： F28F9/013 ,  G21C3/356 ,  F28F7/00

    CPC分类号： F28F9/0135 ,  G21C3/356 ,  Y02E30/40

    摘要： A spacer grid for holding against lateral displacement a plurality of nuclear reactor fuel rods of heat exchange tubes includes means defining a plurality of side-by-side parallel compartments, each compartment being provided with a specially shaped arched spring plate which engages the fuel element or heat exchanger tube. The spring plates are so contoured and apertured as to provide passages for the flow of heat exchange fluid to thereby avoid stagnation of the fluid.

    摘要翻译： 用于保持横向位移的间隔栅格，多个热交换管的核反应堆燃料棒包括限定多个并排的并行隔室的装置，每个隔室设有特殊形状的拱形弹簧板，其接合燃料元件或 热交换器管。 弹簧板是如此轮廓和开孔，以便为热交换流体的流动提供通道，从而避免流体停滞。