Fabry Perot sensor for in-pile nuclear reactor metrology

G Cheymol, C Aubisse, Benoît Brichard, Marijke Jacobs, Marco Van Uffelen

    Research outputpeer-review


    Optical fibre sensors are attractive devices that can bring substantial advantages over conventional sensing approaches for fission Material Testing Reactors (MTRs), such as high accuracy capabilities with limited intrusiveness and the ability to withstand high temperature. In the framework of the Joint Instrumentation laboratory (JIL), CEA and SCKCEN have joined their resources to develop, in particular, an OFS prototype with the aim to measure dimensional changes on nuclear materials irradiated in MTRs. We briefly present the objectives and the workplan of that project, in which the first phase addressed an analysis of the different measurement systems considered towards the specific environmental conditions encountered in a fission reactor. Among them, radiation is responsible for the biggest error source through the density change of silica glass due to neutron-induced compaction. The analysis has leaded us to focus mainly on an Extrinsic Fabry Perot design based on low coherence interferometry. As part of the current development, we present the results of table top experiments that allow appreciating the variation with different parameters of the response, especially the modulation of the signal returned.
    Original languageEnglish
    Title of host publicationProc SPIE - Optical Fibre Sensors I
    Place of PublicationUnited States
    StatePublished - Apr 2008
    EventPhotonic Europe - SPIE, strasbourg
    Duration: 11 Apr 200811 Apr 2008


    ConferencePhotonic Europe

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