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374 facts · 512 sources · updated 2026-09-30

Fact orig-026

newanalysisconfirmed Zero-power criticality shows little about a working reactor, says ex-DOE nuclear chief Katy Huff; Valar's own release draws the same line
2026-01 · orig-026 · Katy Huff, Neutron Bytes, Latitude Media, Valar Atomics

Katy (Kathryn) Huff, former DOE Assistant Secretary for Nuclear Energy, said a zero-power criticality test 'can be achieved without making real engineering progress on fuel or design', since it only shows neutrons can multiply. Neutron Bytes (Dan Yurman, Feb 28, 2026) quotes it as said to Latitude Media 'last month' and names Valar's Los Alamos test as her example; MIT Technology Review (July 9, 2026) quotes the same words from the Catalyst podcast earlier that year. The original interview was not opened in this pass. It is directed at claims built on the November 2025 NOVA result (orig-008). Valar's own NOVA release concedes the distinction ('Cold proves the physics. Hot proves the power.').

In plain termsA former head of DOE's nuclear office said a 'zero-power' test only shows the chain reaction works; it says little about whether a working power reactor will. Valar's own release concedes the point: 'Cold proves the physics. Hot proves the power.'
verified 2026-09-29: Verify pass 2 (2026-09-29): Neutron Bytes and NOVA release re-read. MIT Technology Review quotes Huff's same words, so a second independent report was added and confidence raised; date set to January 2026 ('last month' per Neutron Bytes). Correction 2026-10-01 (precision review): wording made more exact against the cited records.

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