Stay Curious. Stay Connected.
MailNewsletters♡Donate Now
Sign up
*Password must be at least 8 characters and contain one uppercase letter, one lowercase letter, one number and one symbol.
Already have an account?
By submitting, you consent that you are at least 18 years of age and to receive information about MPR's or APMG entities' programs and offerings. The personally identifying information you provide will not be sold, shared, or used for purposes other than to communicate with you about MPR, APMG entities, and its sponsors. You may opt-out at any time clicking the unsubscribe link at the bottom of any email communication. View our Privacy Policy.
Sign in to your profile
Forgot Password?
New to MPR News?
Welcome back
to news
for you
Reset Password

Enter the username on file and we'll send you a code to reset your password.

Still require assistance or not sure what your User Name is?
Welcome back
to news
for you
Email Verification

A verification code has been emailed to

Still awaiting the code?
Climate Cast ®
Paul Huttner and Megan Burks

Like factory-built homes, nuclear reactors are going modular

A rendering of a small-scale power plant.
An artist’s rendering of NuScale Power’s small modular nuclear reactor plant.
Courtesy of NuScale

Go Deeper.

Create an account or log in to save stories.

Like this?

Thanks for liking this story! We have added it to a list of your favorite stories.

Updated: Sept. 25, 3:47 p.m. | Posted: Sept. 24, 4:29 p.m.

Last October, Xcel Energy CEO Ben Fowke told Climate Cast that the Minnesota-based utility company is interested in exploring some outside-of-the-box technologies to achieve 100 percent carbon-free energy by 2050.

Now, one of them — a new kind of nuclear reactor — is a step closer to hitting the market.

The U.S. Nuclear Regulatory Commission gave its first design approval for small modular reactors, or SMRs, to a company called NuScale Power in late August. The technology shrinks the cost, footprint and, according to NuScale, the risk of traditional nuclear. And it could help utilities fill gaps in reliable energy left by wind and solar that are currently being filled by coal power plants, natural gas and old nuclear power plants.

The reactors and their 15-by-70-foot containment vessels are assembled in a factory and can power 45,000 homes. Utilities can assemble a power plant using any number of these reactors to fit their needs.

“It’ll look more like an industrial building, as opposed to the large containment domes you associate with nuclear power,” said NuScale Co-founder and Chief Technology Officer José Reyes. “We designed our plants so that we can repurpose coal fire plants, and we can also retrain many of their workers to work at a NuScale plant.”

Reyes said 12 NuScale modules would avoid more than 6 million tons of CO2 emissions a year when compared with coal power plants. A study commissioned by a utility company in the Pacific Northwest found including SMR’s in its energy mix would be the most cost-effective way to reach the state’s zero-emissions mandate.

A safety review earlier this year did cast doubt on NuScale’s claim that the reactors would successfully shut down and remain cool in the event of an accident, according to Science Magazine. Reyes told the magazine that the issue would be resolved before a plant is built.

Reyes spoke with MPR News chief meteorologist and Climate Cast host Paul Huttner. Hear their conversation using the audio player above.