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Sandia expands software billed as “Swiss Army knife” of nuclear system safety

August 30, 2021, 3:00PMNuclear News

Sandia's Brad Beeny (left) and Larry Humphries examine remnants from a series of lower head failure experiments. Results from these and other experiments are used to inform nuclear accident modeling computer code. (Photo: Randy Montoya)

Researchers at Sandia National Laboratories have been expanding MELCOR—the severe accident modeling computer code used by the Nuclear Regulatory Commission to evaluate the safety of light water reactors—to study the small modular reactors and non-light-water advanced reactors that are under development. An article published in Sandia Lab News on August 27 describes in detail how MELCOR is being expanded to work with different reactor geometries, fuel types, and coolant systems.

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NRC updates: New chair, rule reversal, and EO planning

January 9, 2026, 12:31PMNuclear News

Thursday was a busy news day for the Nuclear Regulatory Commission, with three significant announcements.In the span of a few hours, the NRC released the news of Ho Nieh’s promotion to...

From Capitol Hill: Nuclear is back, critical for America’s energy future

January 8, 2026, 3:08PMNuclear News

The U.S. House Energy and Commerce Subcommittee on Energy convened its first hearing of the year, “American Energy Dominance: Dawn of the New Nuclear Era,” on January 7, where lawmakers...

DOE signs two more OTAs in Reactor Pilot Program

January 7, 2026, 3:58PMNuclear News

This week, the Department of Energy has finalized two new other transaction agreements (OTAs) with participating companies in its Reactor Pilot Program, which aims to get one or two...

DOE awards $2.7B for HALEU and LEU enrichment

January 6, 2026, 3:43PMNuclear News

Yesterday, the Department of Energy announced that three enrichment services companies have been awarded task orders worth $900 million each. Those task orders were given to American...

The NRC is back to five commissioners

January 5, 2026, 10:46AMNuclear News

Douglas Weaver, nominated to the Nuclear Regulatory Commission by President Trump and confirmed by the U.S. Senate, was sworn in on December 22 as a commissioner for a term ending June 30,...

Duke Energy submits an ESP application to the NRC

January 5, 2026, 6:28AMNuclear News

Following up on an October announcement on plans to invest more heavily in nuclear power, Duke Energy closed out 2025 by submitting an early site permit application to the Nuclear Regulatory...

NRC grants Clinton and Dresden license renewals

December 18, 2025, 3:00PMNuclear News

Three commercial power reactors across two Illinois nuclear power plants—Constellation’s Clinton and Dresden—have had their licenses renewed for 20 more years by the Nuclear Regulatory...

NRC proposes rule changes in response to EO

December 11, 2025, 3:00PMNuclear News

In April, President Donald Trump signed Executive Order 14270, “Zero-Based Regulatory Budgeting to Unleash American Energy,” which calls for the Nuclear Regulatory Commission (along with...

Thea Energy releases preconceptual plans for Helios fusion power plant

December 18, 2025, 9:30AMNuclear News

Fusion technology company Thea Energy announced this week that it has completed the preconceptual design of its fusion power plant, called Helios. According to the company, Helios is “the...

PR: American Nuclear Society welcomes Senate confirmation of Douglas Weaver as NRC commissioner

Senate confirms Douglas Weaver as commissioner for the U.S. Nuclear Regulatory Commission

December 17, 2025, 3:10PMPress Releases

WASHINGTON, D.C. — The American Nuclear Society (ANS) applauds the U.S. Senate’s confirmation of Douglas Weaver to serve as a commissioner of the U.S. Nuclear Regulatory Commission (NRC):...

Sandia expands software billed as “Swiss Army knife” of nuclear system safety

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