Search Results

Westinghouse eVinci Microreactor Achieves Significant Breakthrough in Zero-Power High-Temperature Criticality Test

Westinghouse Electric Company recently announced that its eVinci microreactor achieved a significant breakthrough in a zero-power high-temperature criticality test, successfully achieving criticality at a temperature of 663 degrees Celsius, marking an important milestone in the project's development. This test is an important practice of the build-test-learn development model, providing key data for accelerating subsequent prototype design. The test was conducted at the U.S. Department of Energy National Nuclear Security Administration (NNSA)'s National Criticality Experiments Research Center (NCERC) in Nevada, with active cooperation and support from Los Alamos National Laboratory and the Nevada National Security Site (NNSS). The selection of the test site has sign...

2026-09-16

Westinghouse eVinci Microreactor Completes Zero-Power Criticality Testing

Westinghouse Electric Company announced on August 25 that its eVinci microreactor has completed zero-power criticality testing, validating relevant models and key assumptions in the core design. The test was completed at 10:39 a.m. Pacific Time on August 24, 2026, at the National Criticality Experiments Research Center (NCERC) at the Nevada National Security Site (NNSS). The center is operated under the U.S. National Nuclear Security Administration (NNSA). The test was conducted by Westinghouse Electric in collaboration with Los Alamos National Laboratory (LANL) and Idaho National Laboratory (INL). Zero-power criticality is typically used to verify that a reactor core can achieve a self-sustaining chain fission state at extremely low power levels, serving as a critical step in reactor physics testing and design validation...

2026-08-26