发明授权
- 专利标题： Eddy current for the characterization of broached tube support plate blockage
- 专利标题（中）： 涡流用于表征拉管管支撑板堵塞
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申请号： US12702142申请日： 2010-02-08
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公开(公告)号： US08527216B2公开(公告)日： 2013-09-03
- 发明人: John C. Griffith , Joseph R. Wyatt , Mihai G. M. Pop , Jeffrey M. Fleck
- 申请人： John C. Griffith , Joseph R. Wyatt , Mihai G. M. Pop , Jeffrey M. Fleck
- 申请人地址： US VA Lynchburg
- 专利权人： Areva NP Inc
- 当前专利权人： Areva NP Inc
- 当前专利权人地址： US VA Lynchburg
- 代理机构： Davidson, Davidson & Kappel, LLC
- 主分类号： G01B7/34
- IPC分类号： G01B7/34 ; G01B5/28
摘要：
A method for determining tube support plate blockage of a steam generator includes the following steps: measuring at least five different eddy current values per tube support intersection; calculating a nominal clean fit radius of flow hole; determining a center signal response; converting the center signal response to a deposit thickness; determine an edge reduction; converting the edge reduction to an edge thickness; calculating the resulting flow hole radius; verifying the reasonableness of the resulting flow hole radius; and determining a virtual calibration range.
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