US Maritime Administration and Core Power Chart Course for Nuclear-Powered Commercial Shipping

The United States Department of Transportation's Maritime Administration and Core Power announced a non-exclusive Memorandum of Cooperation to advance nuclear frameworks for maritime applications. The agreement, signed in Washington DC, aligns with the US Maritime Action Plan and Executive Order 14269 on restoring American maritime dominance, positioning nuclear propulsion as a strategic capability for commercial shipping.

Nuclear propulsion fundamentally alters operational economics for commercial vessels. A reactor sustains high power output for years between refuelling cycles, reducing dependence on conventional marine fuel supply chains and eliminating propulsion-related emissions. The commercial challenge lies in developing an integrated system that meets safety, security, licensing, insurance, and financing requirements at fleet scale.

Core Power targets first construction starts from 2028
The framework addresses regulatory acceptance, port operations, workforce credentialling, fuel services, lifecycle support, insurance, finance, and industrial capacity
Conventional hulls and marine systems will be constructed at commercial shipyards, with allied shipbuilding capacity accelerating hull production
A dedicated US nuclear-grade integration and lifecycle shipyard will handle nuclear installation, fuelling, testing, commissioning, refuelling, and through-life support

Supply Chain and Industrial Strategy

The agreement establishes a forum for government, industry, and stakeholders to resolve uncertainties across regulatory, operational, and financial domains. Reducing these barriers aims to unlock private capital investment in ships, yards, and supporting infrastructure.

Core Power plans to leverage allied shipbuilding capacity for conventional construction while building specialist nuclear integration capability domestically. This approach seeks to strengthen the broader maritime industrial base while maintaining US control over nuclear-specific operations and lifecycle management.

The framework reflects concerns about global competition in maritime nuclear development. China is advancing toward nuclear-powered commercial shipping, prompting US policymakers to prioritize domestic capability and leadership in this emerging sector.

The memorandum creates an actionable commercial pathway linking policy to private-sector execution
Government coordination and private capital investment are positioned as complementary rather than substitutive
The initiative supports workforce development and credentialling for nuclear maritime operations

Broader Context

The announcement precedes the International Atomic Energy Agency's launch of the Atomic Technologies Licensed for Applications at Sea initiative, which supports maritime industry exploration of small modular reactors for civilian shipping and offshore energy applications. The IAEA ministerial launch event is being hosted by the United States in Washington DC.

The US Maritime Action Plan employs a three-pillar strategy to rebuild industrial capacity identified as central to economic and national security
Seven decades of US nuclear-at-sea experience and allied partnerships position the country to lead next-generation maritime nuclear development
Commercial viability and system-level integration are prerequisites for fleet-scale deployment

Westinghouse eVinci Microreactor Reaches Zero-Power Criticality Milestone

Westinghouse completed zero-power criticality testing of its eVinci microreactor on August 25 at the Nevada National Security Site. The test was conducted in partnership with Los Alamos and Idaho National Laboratories at the National Criticality Experiments Research Center, a National Nuclear Security Administration facility.

Zero-power criticality marks the point at which a nuclear reactor sustains a controlled, self-supporting chain reaction. Unlike full-power operation, this milestone validates core design assumptions and computational models without generating heat or electricity. The achievement demonstrates progress in Westinghouse's development pathway for the containerized microreactor system.

Technology Specifications

The eVinci is a heat pipe-cooled microreactor designed to produce up to 5 megawatts electric with a 15 megawatt thermal core. The reactor uses TRISO fuel and is engineered to operate for eight or more years at full power before requiring refueling.

The factory-built and assembled design enables containerized shipping, supporting deployment across diverse applications including defense and space missions. This modular approach addresses supply chain efficiency by consolidating manufacturing and reducing on-site assembly requirements.

Development Approach

Westinghouse characterized the criticality test as part of its rapid product development philosophy, which integrates testing, modeling, simulation, and iterative design refinement. The company stated this integrated approach accelerates technology maturation while reducing technical risk.

The milestone reflects collaboration with the U.S. Department of Energy and national laboratory partners. Westinghouse Chief Technology Officer Lou Martinez Sancho noted the achievement represents the company's commitment to advancing next-generation nuclear technology.

Inertia and LLNL Cut Fusion Target Fuel Production Time

Inertia Enterprises and Lawrence Livermore National Laboratory have jointly developed an accelerated manufacturing process for the deuterium-tritium ice layer used in inertial confinement fusion target capsules. The process compresses production time from multiple days to a matter of hours, according to Inertia.

The fuel layer—a thin cryogenically frozen coating of deuterium-tritium (D-T)—is a critical component in the spherical carbon-shell capsules used for fusion ignition. Achieving a sufficiently smooth ice layer is essential for target performance. The new process improves manufacturing efficiency while maintaining the surface quality required for ignition conditions.

Supply Chain and Operational Benefits

The manufacturing acceleration delivers multiple advantages across the fusion fuel supply chain. Reduced production time directly lowers manufacturing costs per target, improving economics for pilot-plant operations. The faster cycle also decreases the quantity of tritium that must be maintained in inventory at production facilities.

Lower tritium inventory requirements reduce material handling costs and associated regulatory compliance burdens. Tritium, a scarce and tightly controlled isotope, represents both a supply constraint and a regulatory liability. Minimizing on-site quantities eases operational complexity and reduces dependence on limited fuel supplies, strengthening supply security for fusion energy development.