From Nuclear Waste to Clean Hydrogen

Turning water,
into energy

What if the radiation from used nuclear fuel wasn't just something to manage… but something we could actually use?

At RenU Fuel Solutions, we turn nuclear waste into clean hydrogen and valuable medical isotopes by using its own radiation to split water molecules in a controlled system.

Discover the technology Meet the team Latest news
RenU molecule
Up to 400×
more hydrogen from water
~€2/kg
hydrogen at half the cost of renewables
−50% CO₂
vs. conventional renewable hydrogen
ÆTHER Cell Technology

From traditional design to the optimized reactor

The ÆTHER Cell reactor eliminates the three fundamental limitations of conventional design, multiplying the radiative yield of the system.

Traditional configuration
ÆTHER Cell Reactor (RenU)
Zircaloy cladding
Attenuation of the useful radiative flux by diffusion barrier between the source and the reactant.
→
Removing physical barriers
Fuel dissolved or in fine suspension, with the radiative flux fully available in the reaction medium.
Massive geometry
Severe internal diffusion limitations with an uncontrolled concentration gradient.
→
Particle-size reduction (sub-μm / nm)
Maximized surface-to-volume ratio, with internal diffusion resistances reduced to negligible levels.
Heterogeneous system
Strongly reduced source/aqueous-phase interaction area + sub-optimal radiative coupling.
→
Quasi-homogeneous medium
Fine suspension or solution: optimal source/H₂O coupling and maximized radical kinetics.
Latest news

What's happening at RenU

Noticia 1
Press March 2026
Nuclear Start-Up: RenU Fuel Solutions proposes reusing spent nuclear fuel to produce hydrogen.
Winner of two EIT awards, the company designs a radiolysis system to split water molecules, using spent uranium that would otherwise remain in storage.
Read more
Noticia 2
Press March 2026
Spanish Nuclear Influencer and AIEA Communication Consultant, Alfredo Garcia talks about RenU.
It would radically change the current hydrogen production model based on energy-intensive electrolysis.
Read more
Noticia 3
Awards November 2025
RenU wins EIT Jumpstarter 2025 Energy & Renewables and Mediterranean Member States Special Prize.
RenU Fuel Solutions won the EIT Jumpstarter from the European Institute of Innovation and Technology, in two different categories.
Read more
The concept

A reactor that was always there

"If hydrogen generations exists [G(H₂)] and can be amplified, the phenomenon is not a parasitic effect, it is a reactor whose operating conditions have never been optimized."

1
The reframed problem: Studies report hydrogen generation from spent nuclear fuel, systematically treated as parameters to "control and limit" within a safety-driven framework.
2
The new reading: Through a chemical-engineering lens, those same results say something else: spent nuclear fuel generates hydrogen with a measurable yield.
3
The conclusion: The system is not a constraint. It is a potential chemical reactor whose operating conditions have never been optimized.
Value chain

From spent fuel to clean hydrogen

☢
Spent Nuclear Fuel (SNF)
≥Over 50 years of residual radioactive activity represent an untapped energy source.

RenU leverages this spent nuclear fuel without conventional reprocessing or additional fission.
⚗
ÆTHER Cell Reactor
Proprietary reactor based on catalyzed radiolysis using advanced design.

Designed for continuous operation, modular deployment, and industrial scalability.
Purified H₂
Low-carbon hydrogen produced via radiolysis, avoiding energy-intensive electrolysis.

Integrated membrane purification combined with Rankine-cycle energy recovery.
Medical Isotopes
Efficient co-extraction of high-value medical isotopes.

Performed upstream of the reactor through a dedicated pre-treatment designed to maximize radiolysis efficiency.
Results

The numbers speak for themselves

x 200–400
Improvement of the G(H₂) yield vs. non-catalyzed radiolysis
~€2/kg
Target cost for radiolysis H₂ produced, aligned with EU REPowerEU 2030 objectives
−50% CO₂
Reduction of CO₂ emissions over the full life cycle compared with conventional green hydrogen
Comparative G(H₂) yield — [mol/J] × 10⁻⁸
5
36
48
900
Non-catalyzed radiolysis
ZrO₂ heterogeneous (lit.)
TiO₂ UV-active (lit.)
Catalyzed Radiolysis RenU
Executive team

Experts at the nuclear frontier

CEO & Founder
Alberto Gil Cordero
Ex-Nuclear Contract Owner @ Tractebel
MBA & MSc in Nuclear Engineering
Collège des Ingénieurs & UPM
Best European Master's Thesis in Medical Physics 2024
CFO & Co-Founder
Jacob Kirby
Sr. Economist @ Wyoming PSC
MBA & MSc in Economics
UWyo College of Business
Benson Innovation & Impact Award
COO & Co-Founder
Simone Albanese
Nuclear Engineer @ VALVITALIA GROUP
Double MSc in Nuclear Engineering
UPC & CentraleSupélec
1st Prize European Innovation for Nuclear 2023
CTO
Maciej Sobczyk
Materials & Chemical Engineer @ NSG Group
Nuclear PhD & MSc Environmental Science
AGH University of Krakow
Poland Top 100 Young Scientists Under 30
Contact

Let's talk about the future of nuclear energy

Whether you are a utility, reactor operator, investor, or public institution looking to explore how RenU can transform your nuclear value chain, we'd love to hear from you.

✉
Email
info@renufuelsolutions.com
📍
Headquarters
USA & Europe
🔒
Confidentiality
Technical information available under NDA upon request