公开(公告)号：EP2826040A2

公开(公告)日：2015-01-21

申请号：EP13798220.3

申请日：2013-03-14

申请人： Westinghouse Electric Company LLC

发明人： BLAISDELL, John, A. ,  CHU, Edward, M. ,  ROTANDER, Camilla, S. ,  KUMAR, Gurikar, V.

IPC分类号： G21C17/032

CPC分类号： G21D3/001 ,  G21C17/112 ,  G21D3/04 ,  G21D2003/005 ,  Y02E30/40

摘要： The invention relates to methods for protecting a nuclear reactor core, such as a boiling water reactor core, from fuel and cladding damage due to thermal hydraulic instability in extended operating power flow conditions and, in particular, when an extended power uprate is implemented. The methods employ existing licensed stability methodologies and incorporated minor changes, e.g., to the Average Power Range Monitor (APRM)-based trip system to preclude operation inside the stability vulnerable region of the power/flow map. The APRM-based trip system is modified to set down the APRM flow-biased scram line when core flow is less than a predetermined core flow to prevent the core from entering an unstable region of operation.

摘要翻译： 本发明涉及用于保护诸如沸水反应堆堆芯的核反应堆堆芯免受由于在延长的工作潮流条件下的热水力不稳定性引起的燃料和包壳损坏的方法，并且特别是当实施延长的功率升高时。 这些方法采用现有许可的稳定性方法并且并入例如基于平均功率范围监视器（APRM）的跳闸系统的微小变化，以排除在功率/流量图的稳定性脆弱区域内的操作。 当核心流量小于预定的核心流量时，基于APRM的行程系统被修改以设置APRM流偏置scram线路，以防止核心进入不稳定的操作区域。

公开(公告)号：EP2826040B1

公开(公告)日：2018-03-07

申请号：EP13798220.3

申请日：2013-03-14

申请人： Westinghouse Electric Company LLC

发明人： BLAISDELL, John, A. ,  CHU, Edward, M. ,  ROTANDER, Camilla, S. ,  KUMAR, Gurikar, V.

IPC分类号： G21D3/00 ,  G21D3/04

CPC分类号： G21D3/001 ,  G21C17/112 ,  G21D3/04 ,  G21D2003/005 ,  Y02E30/40

摘要： The invention relates to methods for protecting a nuclear reactor core, such as a boiling water reactor core, from fuel and cladding damage due to thermal hydraulic instability in extended operating power flow conditions and, in particular, when an extended power uprate is implemented. The methods employ existing licensed stability methodologies and incorporated minor changes, e.g., to the Average Power Range Monitor (APRM)-based trip system to preclude operation inside the stability vulnerable region of the power/flow map. The APRM-based trip system is modified to set down the APRM flow-biased scram line when core flow is less than a predetermined core flow to prevent the core from entering an unstable region of operation.