At MIT, doctoral student Dauren Sarsenbayev is tackling one of the biggest hurdles in expanding nuclear energy: the management and perception of high-level radioactive waste. Rather than treating spent fuel solely as a disposal problem, his research explores ways to extract usable heat from it, potentially turning a liability into a source of low-carbon energy and easing long-term storage challenges, tells MIT News.
A central issue with nuclear waste is decay heat, the residual thermal energy released as radioactive materials break down. Instead of letting that heat sit unused, Sarsenbayev’s work investigates conceptual systems that could harness it in a binary geothermal cycle, where waste-generated heat powers a secondary fluid to produce usable energy. Early modeling suggests that a typical spent fuel canister could deliver the energy equivalent of about 1,000 square meters of solar panels under conservative assumptions, pointing to significant untapped value.
His work also builds on expertise in reactive transport modeling, predicting how radioactive elements move over long timescales, critical for safe geological disposal. To make predictions more practical and faster, he is integrating AI-based surrogate models into traditional simulation frameworks, cutting down the computational load required for accurate long-term forecasts.
Sarsenbayev’s personal journey shapes his research perspective. Growing up in Almaty, Kazakhstan, a nation marked by both uranium mining and Soviet nuclear testing, he saw firsthand the tension between nuclear legacy and environmental need. His early interest in environmental engineering grew into a belief that nuclear power, managed right, could play a significant role in decarbonization while improving air quality.
Ultimately, his goal is not just to create better models but to remove barriers to nuclear adoption by reframing waste as a resource, enhancing public perception, and supporting broader deployment of reliable carbon-free power sources. The work stands at the intersection of technical innovation and societal impact.