Kadmos Energy begins SMR validation for Frontier Nuclear (FNUC)

Rhea-AI Filing Summary

Frontier Nuclear and Minerals Inc. reports that its portfolio company, Kadmos Energy Services, has launched a dual experimental validation program for its small modular reactor (SMR) design. The program uses two purpose-built test beds: a scaled thermal-hydraulic flow loop to study water circulation and cooling, and a containment test bed to validate passive safety systems.

The resulting high-fidelity data are intended to support a credible, data-driven licensing submission to the U.S. Nuclear Regulatory Commission. Kadmos’ SMR is a below-grade pressurized water reactor using proven light-water technology and passive safety features, aiming to reduce technological and licensing risk. Kadmos targets power demand from data centers, industrial users, and defense-related applications, with initial commercial operations targeted for the early 2030’s.

Key Figures

Experimental test beds: 2 platforms Targeted commercial operations: Early 2030's

2 metrics

Experimental test beds 2 platforms Thermal-hydraulic flow loop and containment test bed for SMR validation

Targeted commercial operations Early 2030's Planned initial commercial operations for Kadmos SMR technology

Key Terms

small modular reactor, pressurized water reactor, passive safety systems, Nuclear Regulatory Commission, +1 more

5 terms

small modular reactor technical

"dual experimental validation program, which will establish the empirical foundation for Kadmos' small modular reactor"

A small modular reactor is a compact nuclear power plant designed to generate electricity in smaller amounts compared to traditional reactors. It can be built in factories, then transported and assembled on-site, making it quicker and often cheaper to deploy. For investors, these reactors represent a potential source of clean energy with lower upfront costs and flexible scaling, which could influence future energy markets and infrastructure investments.

pressurized water reactor technical

"The Kadmos SMR design is a below-grade pressurized water reactor ("PWR") incorporating passive safety features"

A pressurized water reactor is a type of nuclear power plant that uses water kept under high pressure to carry heat away from the nuclear core without letting it boil; that hot water then passes through a heat exchanger to make steam that drives turbines to produce electricity. Think of it like a sealed pressure cooker transferring heat into a separate steam system. Investors care because this design influences construction and operating costs, safety and regulatory risk, fuel and maintenance needs, and long-term liabilities such as decommissioning—factors that affect a plant’s profitability and investment risk.

passive safety systems technical

"The second is a containment test bed, which will validate the passive safety systems integral to the Kadmos SMR design"

Passive safety systems are design features or components that reduce risk or limit harm without needing active controls, power, or human intervention—examples include seatbelts, crash-absorbing structures, or materials that contain leaks. For investors, they matter because they can lower regulatory hurdles, reduce long-term liability and operating costs, and improve a product’s reliability and market acceptance; think of them as built-in safety nets that work even if everything else fails.

Nuclear Regulatory Commission regulatory

"data required to support a credible, data-driven licensing submission to the NRC"

The Nuclear Regulatory Commission is a government agency responsible for overseeing the safety and security of nuclear power plants and radioactive materials. It sets rules and monitors practices to prevent accidents and protect public health. For investors, its regulations can influence the stability and operation costs of nuclear energy companies, affecting their long-term viability.

light-water reactor technology technical

"Kadmos' choice of proven light-water reactor technology is central to this strategy"

Form 6-K: How Foreign Companies Report to the SEC →

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

FORM 6-K

REPORT OF FOREIGN PRIVATE ISSUER PURSUANT TO RULE 13a-16 OR 15d-16
UNDER THE SECURITIES EXCHANGE ACT OF 1934

For the month of April 2026

Commission File Number: 001-41085

FRONTIER NUCLEAR AND MINERALS INC.
(Translation of registrant's name into English)

360 Main St 30th Floor
Winnipeg, Manitoba R3C 4G1 Canada
(Address of principal executive offices)

Indicate by check mark whether the registrant files or will file annual reports under cover Form 20-F or Form 40-F.

[ x ] Form 20-F   [   ] Form 40-F

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(1):  ☐

Indicate by check mark if the Registrant is submitting the Form 6-K in paper as permitted by Regulation S-T Rule 101(b)(7):  ☐

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly authorized.

	FRONTIER NUCLEAR AND MINERALS INC.
	(Registrant)
Date: April 29, 2026	By	/s/ Kyle Nazareth
		Kyle Nazareth
		Chief Financial Officer

EXHIBIT INDEX

Exhibit		Description of Exhibit
99.1		Press Release dated April 29, 2026 – Frontier Nuclear’s Portfolio Company, Kadmos Energy, Launches Dual Experimental Validation Program for its SMR Design

Frontier Nuclear's Portfolio Company, Kadmos Energy, Launches Dual Experimental
Validation Program for Its SMR Design

Winnipeg, Manitoba - April 29, 2026 - Frontier Nuclear and Minerals Inc., d/b/a Frontier Nuclear (Nasdaq:FNUC) ("Frontier"), a nuclear fuel cycle company, announces that its portfolio company, Kadmos Energy Services LLC ("Kadmos"), has initiated a two-stream experimental validation program, which will establish the empirical foundation for Kadmos' small modular reactor ("SMR") design and its Nuclear Regulatory Commission ("NRC") licensing strategy.

Frontier CEO Remarks

"Kadmos' ability to run design, testing, and licensing in parallel on a timeline and capital budget that would be considered aggressive for conventional infrastructure projects, is what we believe differentiates Kadmos from the other companies developing SMR designs," said Frank Wheatley, CEO of Frontier.  "This accelerated development timeframe sets the foundation for value creation for Frontier shareholders, and we look forward to providing continued support to Kadmos in reaching these milestones," continued Mr. Wheatley.

Kadmos Validation Program

The experimental program centers on two purpose-built test beds.  The first is a scaled thermal-hydraulic flow loop designed to characterize water circulation and cooling behavior under normal and transient operating conditions.  The second is a containment test bed, which will validate the passive safety systems integral to the Kadmos SMR design.  Together, the two platforms are expected to generate the high-fidelity experimental data required to support a credible, data-driven licensing submission to the NRC.

Kadmos SMR Design Strategy

The Kadmos SMR design is a below-grade pressurized water reactor ("PWR") incorporating passive safety features that eliminate reliance on active intervention under accident conditions.  Demonstrating the performance of those features experimentally, rather than relying solely on analysis, strengthens the technical basis for licensing, and directly addresses the data requirements that regulators expect vendors to satisfy prior to design approval.

Kadmos' choice of proven light-water reactor technology is central to this strategy.  Unlike novel reactor designs that must generate an entirely new body of operational and safety data before regulators can evaluate their licensing basis, Kadmos builds on decades of global PWR experience.

Kadmos CEO Remarks

"Execution and validation are central to our approach," said Dr. Youssef Ballout, Kadmos Founder and CEO.  "By investing early in experimental capabilities, we are ensuring that our modeling and simulation work is grounded in high-fidelity data.  This is essential not only for design confidence, but also for an efficient and credible licensing process."

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"This is a foundational investment that directly supports value creation," Dr. Ballout added. "For our investors, including Frontier Nuclear, this work reduces technical and licensing risk while accelerating our path to deployment.  Our strategy consists in leveraging the plethora of existing datasets, performing early validation experiments, and executing in parallel to compress timelines.  That is how capital-efficient nuclear projects succeed."

Kadmos Commercial Strategy

Kadmos is developing its SMR technology to address the demand for data centers, industrial energy users, and defense-related applications requiring secure, reliable and scalable power.  Kadmos is advancing engineering, testing, and licensing activities in parallel, with initial commercial operations targeted for the early 2030's.

About Kadmos Energy Services

Kadmos Energy Services LLC is a U.S. based nuclear energy company focused on the development and deployment of small modular reactors using proven light-water reactor technology.  Kadmos' approach emphasizes low technological risk, established supply chains, and an execution driven model to enable accelerated licensing and near-term deployment.  Kadmos is targeting applications across data centers, industrial energy, and national security infrastructure, delivering reliable, scalable, and carbon free energy solutions.

For more information, visit www.kadmosenergy.com.

About Frontier Nuclear and Minerals Inc.

Frontier Nuclear and Minerals Inc. is focused on building a U.S.-based nuclear fuel cycle platform through uranium exploration and development assets, together with targeted investments in enrichment and reactor technologies.  Frontier continues to evaluate opportunities in the nuclear fuel cycle that align with its long-term strategic objectives.

For more information, visit: www.frontiernuclear.com

Forward-Looking Statements:  This press release contains "forward-looking statements" within the meaning of Section 27A of the Securities Act of 1933, Section 21E of the Securities Exchange Act of 1934 and the "safe harbor" provisions under the Private Securities Litigation Reform Act of 1995 that are subject to substantial risks and uncertainties.  All statements, other than statements of historical fact, contained in this press release are forward-looking statements, including without limitation statements with regard to Frontier Nuclear and Minerals Inc.  We base these forward-looking statements on our expectations and projections about future events, which we derive from the information currently available to us.  Forward-looking statements contained in this press release may be identified by the use of words such as "anticipate," "believe," "contemplate," "could," "estimate," "expect," "intend," "seek," "may," "might," "plan," "potential," "predict," "project," "target," "aim," "should," "will," "would," or the negative of these words or other similar expressions, although not all forward-looking statements contain these words.  Forward-looking statements are based on Frontier Nuclear and Minerals Inc.'s current expectations and are subject to inherent uncertainties, risks and assumptions that are difficult to predict.  Further, certain forward-looking statements are based on assumptions as to future events that may not prove to be accurate. Some of these risks and uncertainties are described more fully in the section titled "Risk Factors" in our registration statements and annual reports filed with the Securities and Exchange Commission.  Forward-looking statements contained in this announcement are made as of this date, and Frontier Nuclear and Minerals Inc. undertakes no duty to update such information except as required under applicable law.

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For Further Information:

Frank Wheatley	Investor Relations
Chief Executive Officer	ir@snowlakelithium.com
fw@snowlakelithium.com	www.frontiernuclear.com

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FAQ

What did Frontier Nuclear (FNUC) announce about Kadmos Energy?

Frontier Nuclear announced that its portfolio company Kadmos Energy has started a dual experimental validation program for its small modular reactor design. The work focuses on testing cooling behavior and passive safety systems to build a strong, data-driven basis for future NRC licensing.

What is the purpose of Kadmos Energy’s dual experimental validation program?

The program aims to generate high-fidelity experimental data to support Kadmos’ SMR licensing strategy with the NRC. It tests thermal-hydraulic performance and containment safety, helping ensure the design’s cooling behavior and passive safety features are thoroughly validated before commercial deployment.

How is Kadmos Energy’s SMR design described in the Frontier Nuclear (FNUC) update?

Kadmos’ SMR is a below-grade pressurized water reactor using proven light-water technology and passive safety systems. The design is intended to avoid reliance on active intervention during accidents, building on decades of global PWR operating experience to support a more straightforward regulatory review.

Which markets is Kadmos Energy targeting with its SMR technology?

Kadmos is targeting data centers, industrial energy users, and defense-related applications that require secure, reliable and scalable power. The company emphasizes low technological risk, established supply chains, and an execution-driven model to support accelerated licensing and near-term deployment opportunities.

When does Kadmos Energy plan initial commercial operations for its SMR?

Kadmos is targeting initial commercial operations in the early 2030’s. Until then, it is advancing engineering, testing, and licensing activities in parallel, using its experimental validation program to support a credible, data-backed licensing case with the Nuclear Regulatory Commission.

How does Frontier Nuclear (FNUC) describe the value of Kadmos’ validation program?

Frontier highlights the program as a foundational investment supporting value creation. Management notes that early experimental work helps reduce technical and licensing risk, while the parallel approach to design, testing, and licensing aims to compress development timelines compared with conventional infrastructure projects.

Filing Exhibits & Attachments

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Press Releases

• EX-99.1 EXHIBIT 99.1 10.8 KB