High temperature, high radiation strain sensors, and thermal compensators for ITER vacuum vessel

R. Lima; S. Abad; J. Monteiro; J. Maul; L. Ferreira; F. Araújo; S. Panayotis; Alex Martin

doi:10.1117/12.2539817

28 August 2019 High temperature, high radiation strain sensors, and thermal compensators for ITER vacuum vessel

R. Lima, S. Abad, J. Monteiro, J. Maul, L. Ferreira, F. Araújo, S. Panayotis, Alex Martin

Proceedings Volume 11199, Seventh European Workshop on Optical Fibre Sensors; 111990D (2019) https://doi.org/10.1117/12.2539817
Event: Seventh European Workshop on Optical Fibre Sensors, 2019, Limassol, Cyprus

Abstract

This study describes the development and qualification of strain sensors and thermal compensator for monitoring of ITER vacuum vessel. The operating conditions require 20000h at 200°C and gamma radiation doses up-to 10MGy under high vacuum. A sensor concept was designed based on two spot weldable sensing elements: one weldable strain sensor and one weldable temperature compensator. The developed elements were subjected to qualification tests including optical, thermal cycling, thermal aging, mechanical and radiation. The results validated the solution and proved that the elements comply with requested vacuum vessel environment, withstanding 10MGy radiation, ±1000μm/m for 10E+5 cycles at 100°C, 500 cycles from 100°C to 200°C, 100°C for 120000h, 200°C for 20000h and being fully operational after 80h at 250°C.

Citation Download Citation

R. Lima, S. Abad, J. Monteiro, J. Maul, L. Ferreira, F. Araújo, S. Panayotis, and Alex Martin "High temperature, high radiation strain sensors, and thermal compensators for ITER vacuum vessel", Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990D (28 August 2019); https://doi.org/10.1117/12.2539817

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