Optical pyrometry measurement on oxidized Zircaloy-4 cladding

7th European Thermal-Sciences Conference

Bouvry, B.^1 ; Ramiandrisoa, L.^1 ; Cheymol, C.^1 ; Horny, N.^2 ; Duvaut, T.^2 ; Gallou, C.^1 ; Maskrot, H.^1 ; Destouches, C.^3 ; Ferry, L.^4 ; Gonnier, C.^5

Den-Service d'Etudes Analytiques et de Réactivité des Surfaces (SEARS), CEA, Université Paris-Saclay, Gif-sur-Yvette

F-91191, France^1

GRESPI, Université de Reims Champagne Ardenne, Campus Moulin de la Housse, Reims

51100, France^2

CEA Cadarache, DEN/CAD/DER/SPEX/LDCI, St-Paul-lez-Durance

F-13108, France^3

CEA Cadarache, DEN/CAD/DER/SRJH/LEDI, St-Paul-lez-Durance

F-13108, France^4

CEA Cadarache, DEN/CAD/DER/SRJH, St-Paul-lez-Durance

F-13108, France^5

关键词: Constant surface temperatures;    Large wavelength range;    Measurement procedures;    Non contact temperatures;    Optical pyrometry;    Surface temperatures;    Temperature retrieval;    Zircaloy-4 claddings;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/745/3/032103/pdf
DOI  :  10.1088/1742-6596/745/3/032103

来源: IOP

【 摘 要 】

In order to improve the safety of nuclear power plant, loss-of-coolant accident experiments are implemented in research reactor. In this framework, we develop an optical pyrometry device to measure surface temperature (700-1200°C) of Zircaloy cladding without contact. The whole set-up of the simplified device (under air, without radiation) and the measurement procedure including data treatment based on bichromatic pyrometry are presented, as well as results for various temperature levels. Temperature retrieval based on the hypothesis of emissivity ratio equal to a constant, is scanned over a large wavelength range. A rather constant surface temperature is obtained on the spectral range of measurement, confirming the relevancy of emissivity hypothesis. Differences between this non-contact temperature measurement and a complementary thermocouple temperature measurement are also discussed.