Mechanical measurements in RFX-mod experiment

Palma, M. Dalla; Ravarotto, D.; Bello, S. Dal; Fincato, M.; Ghiraldelli, R.; Marchiori, G.; Taliercio, C.; Zaccaria, P.

doi:10.1016/j.fusengdes.2010.03.026

Cited by 2 publications

(1 citation statement)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Fiber Bragg gratings will be mounted also on grounded panels for cross-calibration with thermocouples. External panels of the Residual Ion Dump, heated only on the internal side, will experience out-of-plane deformation, which will be monitored by Strain Gages (SGs); the same deformed shape is monitored at RFX-mod for bending load applied on struts stiffening the mechanical structure [11]. Weldable encapsulated hightemperature strain gages have been evaluated in nuclear-reactor environments [12].…”

Section: Introductionmentioning

confidence: 99%

Design and R&D for MITICA thermal sensors

Palma

Pomaro

Maniero

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

Self Cite

View full text Add to dashboard Cite

In MITICA, the ITER neutral beam injector prototype, in-vessel components will be instrumented with thermocouples for material thermal measurements and water cooling calorimetry.A subset of MITICA thermal sensors will be installed in ITER Neutral Beam Injectors and it will consist of type N Mineral Insulated (MI) thermocouples with Ultra High Vacuum (UHV) compatible termination. Each sensor will end with a metallic/ceramic transition from MI cable to two pins suitable for direct integration into a Remote Handling (RH) compatible connector.A set of sensor prototypes has been procured and tests demonstrate the measuring capability and UHV compatibility: electrical insulation, conductivity, dielectric, and helium bombing tests passed, thus satisfying the technical requirements.The in-vessel thermal sensor system extends from the sensing junction up to the safety important feedthroughs at the vessel vacuum barrier. The whole cabling has been designed to be RH compatible to perform maintenance and replacement of components. The in-vessel RH compatible connector and the safety important feedthrough have been developed to house sensor cabling in a reliable and compact design, coping with all requirements. The design of different sensing junction types has been integrated with reliable mechanical fastenings, providing good and stable thermal contact.The paper describes the thermal system requirements and design, the qualification procedure undertaken on prototypes and the test results.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and R&D for MITICA thermal sensors

Palma

Pomaro

Maniero

et al. 2013

2013 IEEE 25th Symposium on Fusion Engineering (SOFE)

Self Cite

View full text Add to dashboard Cite

show abstract

Design and R&D of Thermal Sensors for ITER Neutral Beam Injectors

Palma

Pomaro

Maniero

et al. 2014

IEEE Trans. Plasma Sci.

View full text Add to dashboard Cite

In-vessel components of Megavolt ITER Injector and Concept Advancement, the ITER neutral beam injector prototype, will be instrumented with different sensor technologies mainly for protection and thermal control: thermocouples (TCs) will be used as thermal sensors distributed on all the in-vessel components, accelerometers as boiling detectors mounted on tubes of cooling channels subjected to high heat fluxes, fiber Bragg gratings as thermal sensors on high-voltage panels, strain gauges (SGs) as strain sensors on panels subjected to out-of-plane deformations. ITER in-vacuum cabling requires to use mineral insulated (MI) cables that exhibit radiation hardness and Ultra High Vacuum (UHV) compatibility. A common issue related to sensors cabled with MI (TCs, accelerometers, and SGs) involves the realization of UHV compatible terminations needed with provide vacuum tightness and mechanical robustness. Prototypes of MI TCs with 0.5-, 0.8-, and 1.0-mm cable diameter and with metallic/ceramic brazed terminations have been procured and tested; all sensors passed electrical and leak tests, including electrical insulation, continuity, dielectric, helium bombing, and thermal cyclic tests, so demonstrating the measuring capability and UHV compatibility. Custom sensor fastenings, custom remote handling compatible connectors, and safety important signal feedthroughs have been designed considering all the boundary conditions and the required number of sensors as obtained from the analyses

show abstract

Mechanical measurements in RFX-mod experiment

Cited by 2 publications

References 4 publications

Design and R&D for MITICA thermal sensors

Design and R&D for MITICA thermal sensors

Design and R&D of Thermal Sensors for ITER Neutral Beam Injectors

Contact Info

Product

Resources

About

Mechanical measurements in RFX-mod experiment

Cited by 2 publications

References 4 publications

Design and R&amp;D for MITICA thermal sensors

Design and R&amp;D for MITICA thermal sensors

Design and R&D of Thermal Sensors for ITER Neutral Beam Injectors

Contact Info

Product

Resources

About

Design and R&D for MITICA thermal sensors

Design and R&D for MITICA thermal sensors