Pink hydrogen, produced using electricity, heat, or a combination of both from nuclear power has emerged as a scalable and low-carbon pathway for global decarbonization. Rapid advancements in nuclear-integrated electrolysis, including alkaline, PEM, and SOEC systems, are enabling deeper thermal coupling, improved conversion efficiency, and enhanced operational reliability. At the same time, progress in high-temperature thermochemical cycles, such as the sulfur-iodine and hybrid-sulfur processes, is driving significant gains in reactor compatibility, hydrogen yield, and overall system performance. Innovations in reactor design, heat-transfer integration, and hybrid nuclear-hydrogen engineering are strengthening the scalability and cost-effectiveness of pink hydrogen. Collectively, these technological developments position nuclear-enabled hydrogen production as a central pillar of future decarbonized energy architectures and an essential contributor to the emerging hydrogen economy.

This study provides a comprehensive review of technological innovations propelling its advancement, focusing on both nuclear-electrolysis hybrids and thermochemical water-splitting systems; multiple production pathways, highlighting their performance attributes, energy efficiency improvements and production cost; the emerging innovation ecosystem, including leading companies, breakthrough technologies, funding initiatives, and global patent activity; and forward-looking perspectives on how integrated reactor technologies, electrolysis advancements, and thermochemical processes can accelerate the adoption of pink hydrogen in future clean energy systems.