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Evaluating Lithium-Lead Mixtures for Increased Tritium Breeding in Fusion Energy Blanket Systems: Exploring the Impact of Composition and Temperature

July 25, 2023

This project investigates hypereutectic liquid lithium-lead (Li-Pb) as a coolant in fusion blanket systems, with a focus on testing the compatibility of compositions with better tritium breeding ratios (TBR). The 12-month study concentrates on static corrosion experiments, comparing silicon carbide (SiC) corrosion rates in Li-rich and eutectic Li-Pb mixtures, and also examining interactions between Mo and Li-Pb. The research seeks to determine the maximum operating temperatures for this material combination, acknowledging the balance between Li-Pb melting temperature and achievable TBR to unlock new opportunities for blanket design. This work lays the groundwork for future collaboration between Kyoto Fusioneering and Oak Ridge National Laboratory. Findings could enhance the TBR of fusion blanket designs, and impact fusion energy development by confirming material compatibility between different compositions of Li-Pb with SiC and Mo at higher temperatures, including at temperatures relevant for very high-temperature blankets (1000°C), which could enable higher electricity conversion efficiencies and commercial applications using process heat.

Kyoto Fusioneering America Ltd.

DUNS / SAM UEI: 118966752

Chris Dorn, c.dorn@kyotofusioneering.com

Oak Ridge National Laboratory (ORNL)

Bruce Pint, Bruce Pint

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