Invention Grant
- Patent Title: Eddy current for the characterization of broached tube support plate blockage
- Patent Title (中): 涡流用于表征拉管管支撑板堵塞
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Application No.: US12702142Application Date: 2010-02-08
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Publication No.: US08527216B2Publication Date: 2013-09-03
- Inventor: John C. Griffith , Joseph R. Wyatt , Mihai G. M. Pop , Jeffrey M. Fleck
- Applicant: John C. Griffith , Joseph R. Wyatt , Mihai G. M. Pop , Jeffrey M. Fleck
- Applicant Address: US VA Lynchburg
- Assignee: Areva NP Inc
- Current Assignee: Areva NP Inc
- Current Assignee Address: US VA Lynchburg
- Agency: Davidson, Davidson & Kappel, LLC
- Main IPC: G01B7/34
- IPC: G01B7/34 ; G01B5/28
Abstract:
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.
Public/Granted literature
- US20110022333A1 EDDY CURRENT FOR THE CHARACTERIZATION OF BROACHED TUBE SUPPORT PLATE BLOCKAGE Public/Granted day:2011-01-27
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