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Long-term radiation effects on fibre Bragg grating temperature sensors in a low flux nuclear reactor

par Fernandez Fernandez, Alberto ;Gusarov, Andreï;Brichard, Benoît;Decréton, Marc;Berghmans, Francis ;Mégret, Patrice ;Delchambre, Alain
Référence Measurement science & technology, 15, 8, page (1506-1511)
Publication Publié, 2004-08

Article révisé par les pairs

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Résumé :

Fibre Bragg grating (FBG) temperature sensors have already shown short-term radiation tolerance in nuclear environments. However, the effect of long-term irradiation needed to be investigated. We therefore characterized multiplexed FBG temperature sensors inserted early 2000 in an irradiation channel of a low flux nuclear reactor. After 50 months, we show that the sensors still operate satisfactorily and that the measured drift is lower than 3 °C. © 2004 IOP Publishing Ltd.