Bibliographic Details
| Title: |
Development and Basic Qualification Steps towards an Electrochemically Based H-Sensor for Lithium System Applications. |
| Authors: |
Holstein, Nils1 nils.holstein@kit.edu, Krauss, Wolfgang1, Nitti, Francesco Saverio2 |
| Source: |
Journal of Nuclear Engineering (JNE). Mar2023, Vol. 4 Issue 1, p1-10. 10p. |
| Subject Terms: |
*DEUTERON reactions, *ELECTROCHEMICAL sensors, *HYDROGEN detectors, *NEUTRON sources, *CHEMICAL stability, *NEUTRON irradiation |
| Abstract: |
IFMIF-DONES, or the International Fusion Materials Irradiation Facility-DEMO Oriented Neutron Source, is a facility for investigations into foreseen fusion power plant materials using the relevant neutron irradiation of 14 MeV. This special n-irradiation is generated by the interaction of deuteron beams with liquid lithium. A critical issue during the operation of IFMIF-DONES is the enrichment of dissolved impurities in the Li-melt loops. The danger occurs as a result of hydrogen-induced corrosivity and embrittlement of the loop components, as well as the security hazards associated with the radioactive tritium. Hence, the application of liquid lithium in IFMIFDONES requires a suitable impurity control system for reliable and low-level maintenance under the operating conditions of DONES. Regarding those requirements, an electrochemical sensor for hydrogen monitoring was developed in the frame of an international EUROFusion--WPENS task, to determine H-concentrations via the electro-motive force (EMF) of Li-melts and a suitable onlinemonitoring system. Long-term tests demonstrated that the sensor fulfills the requirements of chemical andmechanical stability and functionality under the harsh Li environment under the planned DONES conditions. Obtained results and operational experiences will be discussed in regard to application windows, reproducibility and calibration needs. Additionally, recommendations will be outlined for upgraded systems and future qualification needs. [ABSTRACT FROM AUTHOR] |
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| Database: |
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