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    Method for manufacturing a tube and a sheet of niobium-containing zirconium alloy for a high burn-up nuclear fuel
    2.
    发明公开
    Method for manufacturing a tube and a sheet of niobium-containing zirconium alloy for a high burn-up nuclear fuel 有权
    一种用于制造用于具有高燃耗核燃料由铌entaltenden锆合金的片材或管过程

    公开(公告)号：EP1225243A1

    公开(公告)日：2002-07-24

    申请号：EP01201703.4

    申请日：2001-05-09

    申请人： Korea Atomic Energy Research Institute ,  Korea Electric Power Corporation

    发明人： Jeong, Yong Hwan ,  Baek, Jong Hyuk ,  Choi, Byoung Kwon ,  Kim, Kyeong Ho ,  Lee, Myong Ho ,  Park, Sang Yoon ,  Nam, Cheol ,  Jung, Younho

    IPC分类号： C22F1/18 ,  C22C16/00 ,  G21C3/07

    CPC分类号： C22C16/00 ,  C22F1/186 ,  G21C3/07 ,  Y02E30/40

    摘要： Disclosed is a method for manufacturing a tube and a sheet of niobium-containing zirconium alloys for the high burn-up nuclear fuel. The method comprises melting Nb-added zirconium alloy to ingot; forging the ingot at β phase range; β-quenching the forged ingot after solution heat-treatment at 1015-1075 °C; hot-working the quenched ingot at 600-650 °C; cold-working the hot-worked ingot in three to five passes, with intermediate vacuum annealing; and final vacuum annealing the cold-worked ingot at 440-600 °C, wherein temperatures of intermediate vacuum annealing and final vacuum annealing after β-quenching are changed so as to attain the condition under which precipitates in the alloy matrix are limited to an average diameter of 80 nm or smaller and the accumulated annealing parameter (Σ A) is limited to 1.0 × 10 -18 hr or lower, thereby yielding a tube and a sheet of Nb-containing zirconium alloys with excellent corrosion resistance and mechanical properties, capable of stably maintaining nuclear fuel in operation conditions of high temperature/high pressure of high burn-up reactor cores. Such Nb-added zirconium alloys are useful as nuclear fuel cladding tubes, grids and structures of the cores in the light water reactors and heavy water reactors.

    摘要翻译： 本发明公开了一种用于制造管和含铌的锆合金为高燃耗核燃料的片材的方法。 该方法包括：熔化添加Nb的锆合金，以锭; 锻造在β相范围的锭; 测试-quenching固溶热处理后的锻造锭在一○一五年至1075年℃; 热加工在600-650℃下骤冷的锭; 冷加工在三到五关热加工锭，与中间真空退火; 和最终真空退火在440-600℃下的冷加工锭，β--quenching后中间真空退火和最终真空退火的温度worin被改变，以便获得在其下沉淀在合金基体中被限制为平均的条件 为80nm或更小的和累积的退火参数（SIGMA A）直径被限制为1.0×10 <-18> hr以下，由此产生的管和具有优良的耐蚀性和机械性能含Nb锆合金的片材， 能够在高温/高燃耗反应堆堆芯的高压的运行条件稳定地保持核燃料。 添加Nb的搜索锆合金作为核燃料包壳管，格栅，并在轻水反应堆和重水反应堆芯的结构是有用的。