Boletim Webnuclear - Abril 2026

Good Practices and Lessons Learned from the Long Term Operation of Nuclear Power Plants 

IAEA-TECDOC-2117 ¦ English ¦ ISBN 978-92-0-101226-5 ¦ 194 pages ¦ Date published: 2026

This publication compiles a broad range of experiences and practices related to long term operation (LTO) of Nuclear Power Plants from 18 IAEA Member States. Its primary objective is to support nuclear power plants that are preparing to operate beyond their original licence term or design life. It also offers valuable guidance for organizations seeking to acquire or develop the tools needed to implement effective ageing management in future plants, including those currently in the design or construction phases with LTO considerations. More than 50 experts from around the world have contributed to this publication.

Ensuring Safety and Enabling Sustainability: The Safety of Radioactive Waste Management, Decommissioning, Environmental Protection and Remediation

STI/PUB/2133 ¦ English ¦ ISBN 978-92-0-129525-5 ¦ 64 pages ¦ Date published: 2026

This publication presents the conference’s main findings, key messages, and proposed way forward, reflecting participants’ shared commitment to advancing safety and sustainability in radioactive waste management, decommissioning, environmental protection, and remediation. The Conference Chair and Co Chair Report summarizes insights drawn from presentations, panel discussions, rapporteur reports, and the dedicated session on future directions. The proceedings also capture the outcomes of the special IAEA–ICRP joint session on safety and sustainability, which explored how to balance competing factors when optimizing protection and how to effectively engage interested parties in this process.

Approaches to Operating Nuclear Power Plants to Mitigate Production Losses Caused by Climate Change and Environmental Hazards

IAEA-TECDOC-2119 ¦ English ¦ ISBN 978-92-0-101626-3 ¦ 130 pages ¦ Date published: 2026

Climate change is reshaping the environmental context in which nuclear power plants operate. Nuclear power plants are built with robust safety and design margins informed by historical meteorological and hydrological data, as well as by lessons learned from past events. Weather related and environmental events may trigger protective actions, reducing output and in some cases necessitating shutdowns, though the resulting global production losses have generally remained modest. With increasing frequency and intensity of extreme weather events, along with rising average temperatures, shifting water availability and other environmental hazards, the need for adaptation becomes clearer to operating organizations. This publication offers a practical, forward-looking framework for the climate adaptation of production related assets at nuclear power plants, grounded in real world experience and informed by international references. Potential adaptation measures include engineering upgrades, operational improvements and organizational strategies to reduce vulnerability, enhance response capabilities and build resilience. The publication is intended for operating organizations and teams responsible for asset performance, design changes, plant operation, and climate adaptation.

Multinational Pre-licensing Joint Regulatory Review of Advanced Reactor Designs

IAEA-TECDOC-2118 ¦ English ¦ ISBN 978-92-0-101426-9 ¦ 124 pages ¦ Date published: 2026

This TECDOC was developed under the Regulatory Track of the Nuclear Harmonization and Standardization Initiative (NHSI) and presents a structured process for conducting multinational, pre-licensing joint regulatory reviews of small modular reactor (SMR) and advanced reactor designs. It serves as a valuable resource for regulatory authorities, technical support organizations, reactor vendors, and other industry stakeholders involved in the pre-licensing and licensing of advanced reactors. By facilitating coordinated multinational reviews, the process enables the early identification of potential design-related challenges, reduces the risk of design modifications arising from divergent national regulatory requirements, and improves the overall efficiency of regulatory review processes worldwide. The application of this process supports the harmonization of regulatory practices and contributes to the safe and secure global deployment of advanced reactor technologies.

A Least-cost Capacity Mix to Satisfy Growing Electricity Demand without Carbon Emissions in Sweden 

NEA/OECD Publishing ¦ English ¦ 127 pages ¦ Date published: 2026

Sweden faces the largest transformation of its energy system in modern history as it aims for net zero energy emissions and increased energy security, while electrification is expected to double electricity consumption by 2050. An NEA system cost analysis, which was undertaken in collaboration with the Swedish Energy Agency applying the latest iteration of a power system model developed by the NEA, finds that combining the complementary strengths of nuclear power and onshore wind power provides a robust least-cost solution to this challenge. Yet time is of the essence. While the Swedish government has created appropriate framework conditions, industry will now need to move quickly to construct the new nuclear capacity required to realise Sweden’s ambitious objectives by 2050. This report approached this challenge by developing a Base Case 2050 scenario that, based on consensus assumptions, provides a realistic view of how Sweden’s ambitious targets can be achieved in a cost-efficient manner. It contains 13 GW of nuclear capacity and 30 GW of onshore wind capacity. Of the nuclear capacity, 10 GW would be new build, while three of Sweden’s current six reactors would continue to run under long-term operations (LTO). Base Case 2050 is complemented by 20 sensitivity scenarios considering changes in generation costs, nuclear technology (including increased construction risk), renewables (including good and bad weather years), demand, trade and interconnections, flexibility, and residual carbon emissions. These sensitivity scenarios broaden and deepen the overall picture of the Swedish electricity and energy system but do not change it fundamentally.