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Proceedings Paper

High temperature, high radiation strain sensors, and thermal compensators for ITER vacuum vessel
Author(s): R. Lima; S. Abad; J. Monteiro; J. Maul; L. Ferreira; F. Araújo; S. Panayotis; Alex Martin
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Paper 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.

Paper Details

Date Published: 28 August 2019
PDF: 4 pages
Proc. SPIE 11199, Seventh European Workshop on Optical Fibre Sensors, 111990D (28 August 2019); doi: 10.1117/12.2539817
Show Author Affiliations
R. Lima, HBM FiberSensing S.A. (Portugal)
S. Abad, HBM FiberSensing S.A. (Portugal)
J. Monteiro, HBM FiberSensing S.A. (Portugal)
J. Maul, HBM FiberSensing S.A. (Portugal)
L. Ferreira, HBM FiberSensing S.A. (Portugal)
F. Araújo, HBM FiberSensing S.A. (Portugal)
S. Panayotis, ITER Organization (France)
Alex Martin, ITER Organization (France)

Published in SPIE Proceedings Vol. 11199:
Seventh European Workshop on Optical Fibre Sensors
Kyriacos Kalli; Sinead O. O'Keeffe; Gilberto Brambilla, Editor(s)

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