公开(公告)号：US4533514A

公开(公告)日：1985-08-06

申请号：US311886

申请日：1981-10-15

申请人： Michiyoshi Yamamoto ,  Katsumi Ohsumi ,  Shinji Mitani ,  Yoshie Takashima ,  Hiroo Igarashi

发明人： Michiyoshi Yamamoto ,  Katsumi Ohsumi ,  Shinji Mitani ,  Yoshie Takashima ,  Hiroo Igarashi

IPC分类号： G21D1/02 ,  G21C7/00 ,  G21C17/022 ,  G21C19/28 ,  G21D1/00 ,  G21D3/08 ,  G21C19/32

CPC分类号： G21C7/00 ,  G21C17/022 ,  G21C19/28 ,  G21Y2002/103 ,  G21Y2004/302 ,  G21Y2004/40 ,  Y02E30/39

摘要： Control rods are inserted into the core of a nuclear reactor in operation to shut down the reactor output. Before completion of entire control rod insertion, a high-temperature coolant flowing in piping for a reactor water clean-up system is sprayed into the space in the upper portion of the reactor vessel. As the space is under negative pressure, oxygen existing in the water droplets of the sprayed coolant is separated. After completion of entire control rod insertion, a residual heat removal system is operated. The spraying operation is discontinued and a low-temperature coolant cooled by a heat exchanger in the residual heat removal system is sprayed into said space. The coolant sprayed by said first spraying operation is not cooled by the heat exchanger in said residual heat removal system.

摘要翻译： 控制棒在操作中插入核反应堆的核心以关闭反应堆输出。 在整个控制棒插入完成之前，在反应堆水清洁系统的管道中流动的高温冷却剂被喷射到反应堆容器的上部的空间中。 当空间处于负压下时，喷射的冷却剂的水滴中存在的氧气被分离。 整个控制杆插入完成后，操作一个剩余的散热系统。 停止喷涂操作，并且将残留除热系统中的热交换器冷却的低温冷却剂喷射到所述空间中。 通过所述第一喷射操作喷射的冷却剂在所述剩余散热系统中不被所述热交换器冷却。

公开(公告)号：US5307385A

公开(公告)日：1994-04-26

申请号：US895049

申请日：1992-06-08

申请人： Shizuka Shimanuki ,  Kiyotomo Nakata ,  Shizuo Matushita ,  Shigeki Kasahara ,  Michiyoshi Yamamoto ,  Hideya Anzai

发明人： Shizuka Shimanuki ,  Kiyotomo Nakata ,  Shizuo Matushita ,  Shigeki Kasahara ,  Michiyoshi Yamamoto ,  Hideya Anzai

IPC分类号： G01N17/00 ,  G21C17/00

CPC分类号： G21D3/001 ,  G01N17/00 ,  G21C17/00 ,  Y02E30/40

摘要： A method and an apparatus for estimating the remaining service life of an object by measuring the physical quantity of a sample and which are applicable to a nuclear reactor. A plurality of model samples are experimentally prepared by preliminarily disposing a material having substantially the same composition as the object to be subjected to the estimation in an environment substantially the same as the object and measuring the physical quantities of the model samples in relation with exposure times. From this experiment, a relationship between the exposure time and the physical quantity under such an environment is obtained. Further, a critical exposure time which will cause an unstable fracture of a material of an actual sample, which is made of a material substantially the same as the object and placed in substantially the same environment as the object, is preliminarily obtained from the relationship between the exposure time and the physical quantity for the model samples. The physical quantity of the actual sample is then measured. Subsequently, an actual exposure time corresponding to the physical quantity of the actual sample is obtained by using the relationship between the physical quantity and the exposure time. Thereafter, a difference between the critical exposure time and the actual exposure time is calculated to obtain a remaining service life of the object.

摘要翻译： 一种用于通过测量样品的物理量并且适用于核反应堆来估计物体的剩余使用寿命的方法和装置。 通过在与目标基本相同的环境中预先设置与要进行估计的物体基本相同的组成的材料并且测量与曝光时间相关的模型样品的物理量来实验地制备多个模型样本 。 从该实验可以看出，在这种环境下曝光时间与物理量之间的关系。 此外，由与目标基本上相同的材料制成的实际样品的材料的不稳定断裂的临界暴露时间预先从对象的相互关系中获得， 模型样本的曝光时间和物理量。 然后测量实际样品的物理量。 随后，通过使用物理量和曝光时间之间的关系来获得与实际样品的物理量相对应的实际曝光时间。 此后，计算临界曝光时间和实际曝光时间之间的差以获得对象的剩余使用寿命。

公开(公告)号：US5203932A

公开(公告)日：1993-04-20

申请号：US669380

申请日：1991-03-14

申请人： Takahiko Kato ,  Akira Yoshinari ,  Shinzoo Ikeda ,  Michiyoshi Yamamoto ,  Hideyo Kodama ,  Hisashi Sato ,  Masakiyo Izumiya ,  Yasuhisa Aono

发明人： Takahiko Kato ,  Akira Yoshinari ,  Shinzoo Ikeda ,  Michiyoshi Yamamoto ,  Hideyo Kodama ,  Hisashi Sato ,  Masakiyo Izumiya ,  Yasuhisa Aono

IPC分类号： C22C30/00 ,  C22C38/00 ,  C22C38/40 ,  C22C38/44 ,  C30B11/00 ,  G21C3/07 ,  G21C5/00

CPC分类号： G21C3/07 ,  C22C38/40 ,  C30B11/00 ,  C30B29/52 ,  G21Y2002/103 ,  G21Y2002/104 ,  G21Y2004/10 ,  G21Y2004/40 ,  Y02E30/40

摘要： An austenitic steel comprising Ni of 9-30%, Cr of 10-23%, and Fe of at least 45%, is characterized in comprising enough Cr and Ni to form whole austenitic structure in the equilibrium diagram at 700.degree. C., having austenitic phase at room temperature, and the austenitic phase is a single crystal, and has superior resistance against stress. The austenitic steel preferably comprises C.ltoreq.0.1%, Si.ltoreq.1%, Mn.ltoreq.2%, Ni 9-15%, Cr 16-18.5%, and at least one of elements selected from the group of Mo 1-3%, Ti 0.05-1%, and Nb 0.1-1.5%. The alloy is useful as a material for members of a reactor core of a nuclear reactor.