# Westinghouse Advances Microreactor Criticality in Nevada

Westinghouse Electric Company achieved a criticality milestone for its eVinci microreactor in August 2026, completing high-temperature testing at the National Critical Experiments Research Center in Nevada. This milestone supports the commercialization of the transportable nuclear power system designed for resilient energy generation, including applications under the U.S. Army's Janus Program to power military installations. The Department of Energy continues to facilitate this development as part of broader efforts to advance nuclear microreactor technology for both civilian and defense uses.

- The milestone signals progress toward deployment of compact nuclear reactors that can provide reliable, mobile power solutions for military and remote installations.
- Procurement professionals should note the upcoming phases of the Janus Program, which may present contracting opportunities related to microreactor deployment and support.
- Contractors specializing in nuclear energy, power systems, and defense applications can evaluate how to align capabilities with evolving requirements under DOE and Army initiatives.
- The involvement of DOE and national laboratories underscores the importance of collaboration between government and industry in advancing advanced nuclear technologies.

**Jurisdictions:** federal
**Industries:** Energy & Utilities, Defense & Military
**Topics:** Physical Infrastructure
**Published:** September 15, 2026

### Government Entities
- U.S. Department of Energy (DOE)
- Los Alamos National Laboratory
- Idaho National Laboratory
- Nevada National Security Site
- National Nuclear Security Administration (NNSA)

### Vendors
- Westinghouse Electric Company (prime contractor)

### Sources
- [Westinghouse eVinci Microreactor Achieves Criticality Milestone | Department of Energy](https://www.energy.gov/ne/articles/westinghouse-evinci-microreactor-achieves-criticality-milestone) - Energy Fecm