公开(公告)号：US06621884B2

公开(公告)日：2003-09-16

申请号：US09849346

申请日：2001-05-07

申请人： Masato Shibazaki ,  Yutaka Tanaka ,  Shigehiro Kono ,  Atsushi Kimura

发明人： Masato Shibazaki ,  Yutaka Tanaka ,  Shigehiro Kono ,  Atsushi Kimura

IPC分类号： G01T100

CPC分类号： G01T1/185 ,  G01T3/00

摘要： Disclosed is a method of monitoring the neutron sensitivity of a neutron detector. Voltage having a predetermined potential difference is applied between an anode and a cathode without irradiating the neutron detector with neutrons to permit an &agr;-ray to be emitted from the nuclear fission substance. The &agr;-ray ionizes the ionizing gas to form an &agr;-ray current (I&agr;) flowing between the anode and the cathode. The current (I&agr;) thus formed is monitored. Also, with the monitoring region in which the applied voltage and the &agr;-ray current (I&agr;) bear a substantially proportional relationship, obtained is an extrapolated zero-volt &agr;-ray current (I&agr;0) at 0V of the applied voltage between the anode and the cathode from the proportional relationship by an extrapolating method, and the extrapolated zero-volt &agr;-ray current (I&agr;0) is correlated with the neutron sensitivity.

摘要翻译： 公开了一种监测中子探测器的中子灵敏度的方法。 在阳极和阴极之间施加具有预定电位差的电压，而不用中子照射中子检测器以允许从核裂变物质发射α射线。 α射线电离电离气体，形成在阳极和阴极之间流动的α射线电流（Ialpha）。 监测如此形成的电流（Ialpha）。 此外，随着其中施加的电压和α射线电流（Ialpha）具有基本上成比例的关系的监测区域，获得的阳极和/或阳极之间的施加电压的0V处的外推零伏特α射线电流（Ialpha0） 通过外推法的比例关系阴极和外推的零伏特α射线电流（Ialpha0）与中子灵敏度相关。

公开(公告)号：US5930317A

公开(公告)日：1999-07-27

申请号：US938902

申请日：1997-09-26

申请人： Shigehiro Kono

发明人： Shigehiro Kono

IPC分类号： G21C17/00 ,  G21C17/108 ,  G21C17/10

CPC分类号： G21C17/00 ,  G21Y2002/202 ,  G21Y2002/207 ,  G21Y2004/20 ,  G21Y2004/30 ,  G21Y2004/40

摘要： A power range monitor apparatus includes a plurality of average power range monitors for calculating/monitoring local power values, average reactor power values, and core flow rate values, a plurality of rod block monitors for monitoring the average values of local power values, and a plurality of flow rate signal converters for converting the signal form of recirculation rate detection signals. The flow rate signal converters concurrently transmit recirculation rate detection signals as digital signals to the average power range monitors. The average power range monitors obtain core flow rate signals from the respective recirculation rate detection signals, use them to monitor the average reactor power, and transmit them to the rod block monitors. The rod block monitors select optimal values from average reactor power values and core flow rate signals to perform a monitoring operation.

摘要翻译： 功率范围监视装置包括用于计算/监视局部功率值，平均反应堆功率值和核心流量值的多个平均功率范围监视器，用于监视局部功率值的平均值的多个棒块监视器，以及 多个流量信号转换器，用于转换再生速率检测信号的信号形式。 流量信号转换器同时将作为数字信号的再循环速率检测信号传送到平均功率范围监视器。 平均功率范围监测从相应的再循环速率检测信号获得核心流量信号，使用它们来监测平均反应堆功率，并将其传输到棒块监视器。 杆块监测从平均反应堆功率值和核心流量信号中选择最佳值以执行监测操作。