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Valar Atomics startup He said on monday It achieved criticality – a key nuclear milestone – with the help of one of the country’s largest nuclear laboratories. Headquartered in El Segundo, California startwhich last week Announce It has secured a $130 million funding round backed by Palmer Luckey and Palantir CTO Shyam Sankar, and claims to be the first nuclear startup to create a critical fission reaction.
It is also, more specifically, the first company in a Department of Energy pilot program that aims to bring at least three startups to critical condition by July 4 of next year to announce that it has achieved that reaction. The pilot program, formed in the wake of an executive order signed by President Donald Trump in May, has upended US regulation of nuclear startups, allowing companies to reach new milestones such as criticality at a rapid pace.
“Zero energy criticality is the first heartbeat of the reactor, a testament to the validity of physics,” Valar founder Isaiah Taylor said in a statement. “This moment represents the dawn of a new era in American nuclear engineering, one defined by speed, scale, and private-sector execution with closer federal partnership.”
Criticality is the term used when a nuclear reactor is in a continuous state of a series of reactions, which is the first step in providing energy. Enriched nuclear fuel releases neutrons, which collide with other atoms and then split. The resulting neutrons then collide with other atoms, and the reaction begins again. This process is known as fission. A properly functioning reactor has enough reactions to keep the fission chain going and reaching a critical state.
“Think of a long string of dominoes,” says Adam Stein, director of the Nuclear Energy Innovation Program at the Breakthrough Institute, a center for modern environmental policy. “If you have dominoes too far apart, one domino won’t hit the next one. If they’re too far apart, one will hit the next, hit the next, and you’ll have the reaction you’re hoping for.”
There’s a difference between the kind of criticality that Valar reached this week — what’s known as cold criticality or zero-energy criticality — and what’s needed to actually create nuclear energy. Nuclear reactors use heat to generate energy, but in cold criticality, which is used to test reactor design and physics, the reaction is not strong enough to generate enough heat to produce energy.
The reactor that reached criticality this week is not actually a model from Valar’s own company, but rather a combination of the startup’s fuel and technology with key structural components provided by Los Alamos National Laboratory, one of the Department of Energy’s research and development laboratories. Build the compound reactor A Separate fuel testing It was performed last year in the laboratory, using fuel similar to that which the Valar reactor will use.