The better way to make nuclear reactors safe at scale is to minimize the consequence of a failure — assuming everything in the plant fails and proving no radiation dose results — rather than only minimizing the odds that a failure ever occurs.
Isaiah Taylor argues traditional nuclear safety obsesses over driving down accident odds, while Valar's advanced-reactor approach instead designs for zero consequence — assuming total failure and still proving no radiation reaches the public. ✦ AI generated
Isaiah Taylor · No Priors · 2026-07-02 · original ↗
starts at this moment · 17:32
“What do people outside nuclear misunderstand about safety of these SMRs and your design in particular?”
traditional nuclear has focused on risk reduction by reducing the odds, right? So they say, okay, a meltdown could have some bad consequence, so let's make sure that it never ever happens. And all of the effort into risk reduction goes into low odds of anything ever happening. The alternative way that you can reduce risk is actually just reducing consequence. And we would argue that that's a much better way to reduce risk.
verbatim transcript · starts at 17:32
17:32improve is the existing philosophy says okay there's if you look at risk it's actually composed of two different things right it's composed of the odds of the thing happening and the consequence if it does happen and traditional nuclear has focused on risk reduction by reducing the odds right so they say okay Yeah, a meltdown could have some bad consequence. So, let's make sure that it never ever ever
17:56happens. And all of the effort into risk reduction goes into low odds of anything ever happening. The alternative way that you can reduce risk is actually just reducing consequence, right? And we would argue that that's a much better way to reduce risk. Odds uh are stochastic, right? Even if you do an enormous amount of risk reduction on odds and you do all this engineering, something's still going to happen,
18:18right? like just something's going to come out of left field and you can't predict everything. Um and so advanced reactors tend to focus on consequence more than odds. Now we still don't you know we we still try to protect against things like um you know we have sight security here for example right so someone can't come and compromise the control room but from an engineering perspective we also say well what if
18:38someone did you compromise the control room how do we still make sure that it's perfectly safe? Um and so advanced reactors really focus on that that second thing. Um our safety basis when we go to the regulator is everything in the plant has failed. Absolutely everything right. Everything >> we know what happens. >> Yeah. In fact it is it is safe. Right. So we have regulatory limits where we
19:01say okay in an accident scenario you can't dose the public with radiation. Right. That's really ultimately what a nuclear regulator is trying to prevent. You can't dose public and workers with radiation. And so our safety basis says, "All right, let's look at the reactor design and pretend that everything in it has failed. Are we dosing the, you know, workers in the public with radiation?" And the answer is no. Um, and that's
19:25super super important because even though we do still try to reduce the odds, we have site security, we make sure that our operators are well trained, we start with the worst case possible scenario where everything has failed and we say, "How do we make that fa that safe?" And that's really a physics problem. It's really about the geometry of the core. It's about the materials that you use. Trico is a huge