Isaiah Taylor, founder of Valor Atomics, discusses building the first advanced nuclear reactor in the U.S. in decades, aiming to go critical by July 4th, and the company’s strategy to scale production to hundreds or thousands of reactors through manufacturing innovation and vertical integration.
Manufacturing nuclear reactors is a SpaceX style problem
Building reactors requires a repeatable, scalable approach similar to SpaceX’s Falcon 9 rather than mass production like Tesla, focusing on replicability and deployment efficiency.
The reactor size (around 25 MW) was determined through manufacturing constraints rather than pre-defined design, balancing ease of construction, transportability, and scalability.
Scaling to gigawatt levels requires turning on reactors daily, not building large centralized plants, by iterating through real-world builds rather than theoretical design cycles.
Scaling from 1 reactor to 10
The path from one to ten reactors involves “pain and suffering” due to unforeseen challenges in supply chains, integration, and regulatory processes that cannot be predicted on paper.
Vertical integration is necessary because suppliers often fail to deliver on time or at scale, forcing companies to control the entire process from design to operation.
The first reactor’s goal is to become a “nuclear company” by splitting atoms and gaining hardware experience, with subsequent reactors improving through iterative learning.
Why it’s so tempting to iterate on paper instead of actually building reactors
Nuclear’s operational complexity makes real-world iteration difficult, leading companies to default to design work that avoids the risks of physical testing.
Historical nuclear development relied on extensive real-world testing (e.g., 70 prototypes by the Atomic Energy Commission), but modern efforts lack this foundation.
The industry’s current structure, with fragmented responsibilities between design, EPC, and operations, creates inefficiencies and disincentives for cost reduction.
Having contact with reality - modular shielding
Initial attempts to design modular shielding failed due to complexity, forcing a temporary return to on-site pouring before solving the problem through iterative engineering.
The final modular shielding design avoids grouting and bolts, using stacked blocks with crane placement, which required overcoming 16,000 engineering challenges.
Real-world testing revealed flaws in theoretical designs, proving that physical iteration is faster and more effective than prolonged paper-based planning.
Steel is cheaper than software engineers
The “idiot index” in nuclear (cost vs. constituent materials) is hundreds, far exceeding typical industrial products, due to fragmented industry incentives.
Valor Atomics vertically integrates all aspects of reactor production to eliminate cost inflation from multiple vendors and ensure accountability.
The company’s reactor cost under $100 million in funding demonstrates that vertical integration can drastically reduce expenses compared to traditional nuclear projects.
Why Valar had to vertically integrate
Control rod drive units required 40 iterations and in-house manufacturing after suppliers failed to meet timelines, highlighting the need for internal capability.
Community engagement is critical, with teams spending extensive time understanding local concerns and building trust before construction begins.
The company’s strategy mirrors Boeing owning the entire aircraft lifecycle, ensuring alignment between design, manufacturing, and operational goals.
Designing a Toyota Camry vs a Ferrari
Nuclear reactors should prioritize simplicity and safety over efficiency or power density to enable mass production and cost reduction.
High power density reactors (e.g., 1.2 GW) are harder to scale, while simpler designs (e.g., 25 MW) can be replicated in factories to achieve lower costs.
The goal is to reduce nuclear plant costs from $7,000–$15,000/kW to $1,000/kW through factory-based manufacturing and iterative improvements.
Running through 1-way doors
One-way decisions (e.g., investing $40 million in a site) require risk tolerance and instinct, as some choices cannot be reversed but are necessary for progress.
Reading regulations and laws directly revealed opportunities to accelerate timelines, as many perceived barriers were not explicitly prohibited.
The company’s willingness to take capital risks on critical paths enables faster execution than competitors who avoid such commitments.
Pulling rabbits out of a hat
A last-minute loader truck failure before a C-17 reactor transport was solved by fabricating a custom truck in 48 hours, demonstrating the team’s ability to solve urgent problems.
The solution required rapid engineering, welding, and coordination across multiple teams, highlighting the importance of a relentless, adaptable workforce.
Such “rabbit-out-of-a-hat” moments are enabled by a culture that embraces extreme urgency and cross-functional collaboration.
Wartime mode
When timelines slip, the company enters “wartime mode” by gathering precise, ground-level information and mobilizing all non-critical staff to solve bottlenecks.
A war room was convened to address a licensing gap, involving everyone from engineers to photographers in a 4-day effort to resolve the issue.
Success depends on relentless pursuit of root causes and willingness to take “unreasonable” actions to maintain schedules.
How Elon injects urgency into his companies
Urgency is injected by constantly asking what must be true to achieve long-term goals (e.g., turning on 24 reactors daily) and identifying immediate blockers.
Custom software tracks the company’s critical path in real time, ensuring alignment across teams on the most important tasks.
Cultural emphasis on speed and iteration attracts talent and creates a self-reinforcing cycle of rapid progress.
Relentlessly chasing the goal of making energy 10x cheaper
The North Star of making energy 10x cheaper remains unchanged, even as external conditions (e.g., Trump’s nuclear executive orders) shift the company’s focus to Utah.
Scaling requires simplicity and safety to enable mass production, with physics-based safety (e.g., graphite reactors) reducing operational complexity.
The company’s approach mirrors SpaceX’s disruption of aerospace, aiming to invert the U.S.’s lag in nuclear reactor construction through rapid iteration and scale.
Designing safe nuclear reactors
Safety is achieved through physics (e.g., negative thermal feedback in graphite reactors) rather than engineering controls, making meltdowns and runaway reactions inherently impossible.
Trico fuel and graphite’s high thermal inertia allow the reactor to passively manage decay heat, eliminating the need for active cooling systems post-shutdown.
Real-world testing confirmed that the reactor stabilizes at safe temperatures without external intervention, validating the physics-based safety approach.
Learning from SpaceX - optimizing for scale
Scale is prioritized in every design decision, with the goal of building millions of reactors requiring simplicity, modularity, and physics-based safety.
Trico fuel and low power density are tradeoffs for scalability, enabling mass production and reducing costs through standardized components.
The company’s ambition to reach a million reactors drives decisions that may seem counterintuitive but align with long-term scaling goals.
Having a high tolerance for looking dumb
Isaiah embraces appearing foolish to uncover root truths, believing that asking naive questions leads to better decisions and faster progress.
This mindset allows the company to challenge assumptions and iterate quickly, even when facing skepticism from industry experts or critics.
Palmer Luckey’s defense of Isaiah’s early vision highlights the importance of supporting unconventional approaches in high-stakes industries.
Inevitable time
Certain processes (e.g., heat treatment) have irreducible time constraints, forcing parallel execution and early initiation of critical tasks.
The company avoids relying on national labs to learn how to build reactors from scratch, accepting the time and risk of independent development.
Clock time is the most valuable resource, requiring early investment in tasks that cannot be accelerated through additional funding or manpower.
Predicting unknown bottlenecks
Maintaining a high organizational pace helps uncover potential bottlenecks and engineer solutions before they become critical issues.
Thinking backward from the goal of a million reactors reveals decisions that seem odd now but are essential for future scalability.
Paranoia about unseen challenges drives proactive problem-solving, ensuring the company stays ahead of potential delays.
Scaling
Scaling is an organic process driven by continuous iteration, not a planned phase that begins after initial success.
The company’s DNA is built around rapid replication, with each reactor informing improvements for the next.
The tick rate of the organization (time between reactor builds) will shrink as processes mature, enabling exponential growth.
July 4th will be a rebirth for nuclear in the United States
July 4th marks the deadline for the nuclear pilot program under EO14301, symbolizing a return to real-world nuclear development in the U.S.
A functioning reactor, even at small scale, has more impact than theoretical designs because it proves feasibility and builds momentum.
The event represents a cultural shift toward valuing physical progress over paper-based innovation in the nuclear industry.
