公开(公告)号：US4986952A

公开(公告)日：1991-01-22

申请号：US302279

申请日：1989-01-27

申请人： Jean-Michel Bourin ,  Jean-Lucien Mourlevat ,  Gilbert Sengler

发明人： Jean-Michel Bourin ,  Jean-Lucien Mourlevat ,  Gilbert Sengler

IPC分类号： G21C7/36 ,  G21C9/02 ,  G21C17/00 ,  G21D3/04 ,  G21D3/06

CPC分类号： G21C7/36 ,  G21C9/02 ,  G21D3/04 ,  Y02E30/39

摘要： Protection against the consequences of a cluster of control rods falling accidentally is provided by four chains, each of which includes two neutron flux detectors (D1A, D1B), two primary treatment circuits (R1A, S1A and R1B, S1B) associated with said two detectors such that each provides a primary fall signal in the event of the flux measured by the corresponding detector decreasing rapidly, and an OR gate (P1) for providing an output fall signal from the chain in the event of at least one of said primary signals being present. The detectors (D1A, D4B, D3A, D1B, D2A, D3B, D4A and D2B) are angularly distributed around the vertical axis (A) of the core (2). A secondary treatment circuit (6) causes an emergency reactor stop to take place in the event that it receives fall signals at the outputs from at least two chains.

摘要翻译： 防止一组控制棒意外掉落的后果的保护由四个链提供，每个链包括两个中子通量检测器（D1A，D1B），与所述两个检测器相关联的两个主处理电路（R1A，S1A和R1B，S1B） 使得在由对应的检测器测量的通量快速下降的情况下，每个提供初级跌倒信号;以及用于在所述主信号中的至少一个的情况下提供来自所述链的输出下降信号的“或”门（P1） 当下。 检测器（D1A，D4B，D3A，D1B，D2A，D3B，D4A和D2B）围绕铁芯（2）的垂直轴线（A）成角度地分布。 在二级处理电路（6）在至少两条链的输出处接收到跌落信号的情况下，使紧急电抗器停止发生。