Eddy current method for the characterization of broached tube support plate blockage
US8744781B2 · kind B2 · utility
0Cited by
5References
19Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Aug 20, 2013 |
| Grant date | Jun 3, 2014 |
| Priority date | — |
| Expiry date | Aug 20, 2033 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF22B37/003
- WIPO fieldMeasurement
- WIPO sectorInstruments
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.