Inspection tool from James Fisher Nuclear providing vital information for EDF-Energy.

New inspection tool from James Fisher Nuclear providing vital information for EDF-Energy.

James Fisher Nuclear (JFN) is celebrating another substantial contract, with the award of a commission from electricity generator EDF-Energy to produce inspection tools that will use innovative eddy current technology to assess the condition of the graphite cores across their fleet of nuclear reactors to a level that has not previously been possible.

The Eddy Current Inspection Tools (ECIT), developed by JFN in collaboration with EDF-Energy, Serco (now AMEC), Bloodworth Consultancy and Manchester University are designed to assess the condition of the graphite within vacated fuel channels by applying an electromagnetic field to the graphite. As graphite is electrically conductive eddy currents are induced in the material from which the electrical conductivity can be measured and graphite density inferred. Understanding the density variations within each reactor on such a short turn around (compared to trepanning) provides significant support to the safe operation of the reactor fleet. The enhanced understanding of graphite density also enables EDF Energy to improve the assessment of station lifetimes.

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