25 Aug 2026
Signal Headquarters
Vol. I
No. 237
Organization

What is Valar Atomics?

Valar Atomics is an El Segundo-based startup developing passively safe, small modular reactors for industrial-scale clean energy, founded by Isaiah Taylor.

Company timeline

  • Jul 2026 – Isaiah Taylor said Valar Atomics planned to scram its reactor, then shut off all electrical supply, including the circulator and RCCS pump, to observe the outcome.
  • Jul 2026 – Isaiah Taylor said the company aimed to reduce reactor construction time to minutes, and noted that industry peers had called them unsafe after their aggressive testing approach.
  • Aug 2026 – Isaiah Taylor said Valar Atomics spent about $400,000 on a working RPS (reactor protection system) within six weeks.
  • Aug 2026 – Isaiah Taylor said they built a bioshield in about 42 hours, versus the typical three months.
  • Aug 2026 – Isaiah Taylor said Valar Atomics achieved the first advanced reactor to make power by a startup, and the first built outside a national laboratory.
  • Aug 2026 – Isaiah Taylor said they did not call themselves a nuclear startup until they had split the first atom.

Where it appears in the record

Every line below is attributed to a named speaker.

By the numbers

Valar Atomics built a nuclear reactor protection system in six weeks for $400,000, versus industry quotes of $5 million and 2.5 years.

“Six weeks later we had a working RPS and we spent about $400,000 on it.”
Isaiah Taylor · 15 Aug 2026
By the numbers

Valar Atomics reduced reactor bioshield assembly time from 3 months to 42 hours using pre-cast concrete blocks with no grout, bolts, or mechanical locks.

“We went from 3 months, which is what it would normally take to build a bioshield like this to we stack this in about 42 hours.”
Isaiah Taylor · 15 Aug 2026
Company & tool watch

Valar Atomics, the only private company since the discovery of nuclear fission to build and operate an advanced reactor, is worth watching as the leading hardware-first nuclear startup.

“The first advanced reactor to ever make power by a startup. The first advanced reactor ever built outside of the national laboratory.”
Isaiah Taylor · 15 Aug 2026
Worth quoting

Isaiah Taylor describing Valar Atomics' planned passive-safety demonstration, cutting all electrical systems immediately after a reactor scram.

“We're going to scram this reactor. Immediately after we scram, we're actually going to turn off the entire electrical supply to the plant. We're going to turn off the circulator. We're going to turn off the RCCS pump. Every safety system in this plant, we're going to shut off and we're going to watch what happens.”
Isaiah Taylor · 2 Jul 2026
By the numbers

Valar Atomics claims to be the first startup to generate nuclear power and the first advanced reactor built outside a national laboratory.

“The first advanced reactor to ever make power by a startup. The first advanced reactor ever built outside of the national laboratory.”
Isaiah Taylor · 15 Aug 2026
Worth quoting

Isaiah Taylor on Valar Atomics refusing to claim nuclear startup status until actual hardware results were achieved.

“We didn't allow ourselves to call ourselves a nuclear startup until we'd split the first atom.”
Isaiah Taylor · 15 Aug 2026
By the numbers

An executive order called for three advanced reactors to go critical on American soil by July 4th (2026), a milestone Valar Atomics claims to have met.

“It was which called for three advanced reactors to go critical on American soil by July 4th.”
Isaiah Taylor · 2 Jul 2026
Contrarian take

Most of the nuclear industry is a modeling and simulation industry, not a hardware iteration industry, according to Valar Atomics founder Isaiah Taylor.

“Most of the nuclear industry is a modeling and simulation industry. They're not focused on hardware iteration, hardware execution, building the simplest and safest reactor that allows them to scale.”
Isaiah Taylor · 15 Aug 2026
Worth quoting

Isaiah Taylor on a vendor smearing Valar Atomics after losing a $5M contract opportunity.

“They freaked out and started telling everybody in the industry that were an unsafe company that's going to kill people.”
Isaiah Taylor · 2 Jul 2026
Company & tool watch

Valar Atomics: startup aiming to manufacture advanced nuclear reactors at scale, targeting a deployment tick rate of one new reactor every few minutes and a $500B valuation within 10 years.

“We will get it down to minutes.”
Isaiah Taylor · 2 Jul 2026
Signal Headquarters · reference note, compiled from attributed expert discussion. Last updated 2026-08-16.