Small Nuclear Reactors are Coming --- Against All Odds

Quick Overview

Small Modular Reactors (SMRs) face significant challenges, including high costs, complex geometry requiring extensive shielding, and political uncertainty, despite recent regulatory approvals and global interest from entities like the European Commission, EDF, and the US Department of Energy.

Key Points: The Levelized Cost of Energy (LCOE) for SMRs, estimated at $89/MWh plus a $30/MWh subsidy, is potentially more expensive than standard nuclear power, which costs $89/MWh without subsidy. The geometry of smaller reactors increases the surface area, meaning more neutrons can escape, necessitating more shielding. Early industry projects, such as the NuScale Utah project and the EDF plan to build 30 SMRs by 2050, have experienced setbacks, including project cancellations due to rising costs. The Nuclear Energy Agency (NEA) dashboard shows 98 current SMR designs globally, with North America leading in designer headquarters (Figure 8), and the majority being water-cooled concepts (Figure 11). Regulatory progress is noted, with the US NRC approving NuScale's design in May 2025, and the European Commission inviting views on its SMR Strategy. The video highlights ongoing political enthusiasm, such as the UK planning to pioneer its first SMRs in North Wales and Sweden planning its first nuclear expansion in 50 years using mini-reactors.

Context: This news segment analyzes the current state and viability of Small Modular Reactors (SMRs) as a next-generation nuclear power source, contrasting the high hopes and regulatory progress with economic realities and technical hurdles. The presenter discusses figures from the NEA (Nuclear Energy Agency) and reports on recent developments from major players like NuScale, EDF, and government initiatives in the US, UK, and Sweden.

Detailed Analysis

The video argues that while Small Modular Reactors (SMRs) are promoted as a great idea against all odds, several issues temper this enthusiasm. Initially, the presenter notes that the LCOE for SMRs, estimated by the company to be $89/MWh plus a $30/MWh subsidy, might still be more expensive than standard nuclear power ($89/MWh without subsidy). A key technical challenge is that smaller reactor geometry increases the surface area, leading to more neutron escape and requiring more shielding. Furthermore, early projects face hurdles: the NuScale Utah project was canceled in 2023 after costs exploded, and the original 2018 operational timeline for the B&W mPower project proved hypothetical. The video references the NEA's Third Edition SMR Dashboard, which shows 98 current designs, with North America having the most designer headquarters (Figure 8), and water-cooled designs being the most numerous (Figure 11). Despite these financial and geometric difficulties, political interest remains high, evidenced by the UK planning SMRs in North Wales, the EU inviting input on its SMR Strategy, and Sweden planning its first nuclear expansion in 50 years using mini-reactors. The video concludes by promoting Brilliant.org for learning skills related to critical thinking and problem-solving regarding these complex topics.