Valar Watch · Fact ppl-003

Fact ppl-003

newcompany claimconfirmed Mark Mitchell, Chief Nuclear Officer since April 2024: from South Africa's pebble-bed program and Ultra Safe Nuclear

2024-04-29 · ppl-003 · Mark Mitchell, Valar Atomics, Ultra Safe Nuclear Corporation, Pebble Bed Modular Reactor (Pty) Ltd, Isaiah Taylor

A Business Wire release dated 29 April 2024 (linked from Valar's library) announced Mark Mitchell as Valar's Chief Nuclear Officer, to oversee nuclear operations including licensing and regulatory compliance, reactor and powerplant manufacturing planning, and client support and fleet services. It says his nuclear work began at the South African Pebble Bed Modular Reactor company and that he established and led the Micro Modular Reactor (MMR) program at Ultra Safe Nuclear (USNC); Deseret News (Mar 2026) says he was previously president of Ultra Safe Nuclear Corporation, and the September 2025 groundbreaking release issued by the Utah Office of Energy Development's lab and Valar calls him 'former USNC President Mark Mitchell'. The release then described Valar, based in El Segundo, as aiming to make synthetic fuels from CO2 and water with mass-built reactors, a goal the current mission page still lists, now beside hydrogen, data-center power and heavy industrial power (orig-001). Valar's quality plan gives the 'COO/Chief Nuclear Officer' role direct oversight of nuclear operations, engineering and quality assurance, reporting to the CEO (safe-019, safe-036); the mission page lists Mitchell as Chief Nuclear Officer, which would make his the senior nuclear-safety post, although the plan names roles, not people. What became of his earlier programs is in ppl-015.

In plain termsMitchell is one of the most experienced nuclear hands Valar names in public, and by Valar's own rules the Chief Nuclear Officer role holds day-to-day authority over nuclear safety and quality. His earlier employers designed the same family of reactor Valar uses (helium-cooled, graphite, TRISO fuel), which is relevant experience, though neither of those programs finished a working power reactor (ppl-015).

Advanced Nuclear Industry Innovator, Mark Mitchell, Joins Valar Atomics as Chief Nuclear Officer (Business Wire release, syndicated) (Valar Atomics via Business Wire, 2024-04-29) primary company
Library | Valar Atomics (links the Mitchell release) (Valar Atomics) primary company “Advanced Nuclear Industry Innovator, Mark Mitchell, Joins Valar Atomics as Chief Nuclear Officer”
At just 27 years old, this entrepreneur is remaking America's energy industry (Eva Terry) (Deseret News, 2026-03-17) news “previously served as president of Ultra Safe Nuclear Corporation”
Mission | Valar Atomics (Valar Atomics) primary company “Mark Mitchell Chief Nuclear Officer”
Valar Atomics breaks ground at the Utah San Rafael Energy Lab (press release by OED, USREL and Valar Atomics) (Utah Office of Energy Development / Valar Atomics (via Utah Business), 2025-09-17) primary government “led by former USNC President Mark Mitchell”
Ward250 San Rafael Facility Quality Assurance Program Description, No. 100474, Rev 02 (status: Approved) (Valar Atomics (Public Documents), 2025-10) primary company “Direct oversight of nuclear operations, engineering, and quality assurance”

verified 2026-09-29: Re-read the Business Wire release (datePublished 29 Apr 2024), the library entry (it links a Yahoo copy of the same release), Deseret and the mission page. Fixed: 'given way' overstated (mission page still lists hydrocarbon fuels); plain said his employers 'built' such reactors, but neither PBMR nor USNC's MMR was completed; the QA-plan role is 'COO/Chief Nuclear Officer' and the plan names roles, not people. Added the Sept 2025 OED/Valar release as a second source for the USNC president title. QAPD opened to confirm the COO/CNO role wording; added as a source.

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