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State

Design disclosed

A disclosed design is not a tested one.

Open question

What has the technology itself been shown to do, at what scale and under what conditions?

  • Not established in reviewed sources: Final design status of the Xe-100 for this plant
  • Not established in reviewed sources: Any operating Xe-100 reactor anywhere
  1. Current stateDesign disclosed20 August 2026 · Regulator issued · U.S. Nuclear Regulatory Commission (Federal Register, via govinfo.gov)

    Before: Not established in reviewed sources. Source: U.S. Nuclear Regulatory Commission (Federal Register, via govinfo.gov) ↗

  2. Earlier statementConflicting sourcesDesign disclosed4 June 2026 · Company reported · X-energy (SEC filing, Q1 2026 results presentation)

    Before: Not established in reviewed sources. Source: X-energy (SEC filing, Q1 2026 results presentation) ↗

  3. Earlier statementConflicting sourcesTesting reported4 June 2026 · Company reported · X-energy (SEC filing)

    Before: Not established in reviewed sources. Source: X-energy (SEC filing) ↗

  4. Earlier statementDesign disclosed14 May 2025 · Government record · U.S. Department of Energy, Office of Nuclear Energy

    Before: Not established in reviewed sources. Source: U.S. Department of Energy, Office of Nuclear Energy ↗

Evidence detail

Design disclosed

Xe-100 reactor output and design life

A disclosed design is not a tested one.

“A single reactor can produce 80 megawatts of electric output or 200 megawatts of process heat and is designed to operate for 60 years.”
Attribution
Government record
Publisher
U.S. Department of Energy, Office of Nuclear Energy
Dated
14 May 2025
First public disclosure
14 May 2025
State before
Not established in reviewed sources
Source read
11 November 2026

Inspect primary source: U.S. Department of Energy, Office of Nuclear Energy ↗

What this does and does not establish

An exact passage match shows the source says this. It does not prove the underlying claim is true.

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