Wire · technology
Westinghouse eVinci™ Microreactor Achieves Zero-Power High-Temperature Criticality
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Fusion42 · 16 September 2026 · Fusion42 review
Westinghouse Electric Company completed zero-power high-temperature criticality testing for its eVinci™ microreactor, reaching criticality at 663°C and a peak core temperature of 1,011°C. This milestone advances prototype design validation and accelerates the commercialization pathway for microreactors.
This Wire brief sits within Fusion42's coverage of Climate Tech, and 1 source has reported it between 1 Sep 2026 and 15 Sep 2026.
◆ ◆ The Wire takeaway
Nuclear microreactor developers now have validated high-temp test data speeding design confidence and market entry. You can engage early with Westinghouse’s tech before competitors scale production.
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1 source · first reported 1 Sep 2026 · latest 15 Sep 2026
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