
Safe & Secure
Next generation reactor with walk-away passive safety features for unconditional security.
Economical & Efficient
Innovative design delivers high performance on a small footprint, with an impressive service life.
Dependable & Reliable
Technology is deployable in any region worldwide, without relying on local electric grids.
Environment-Friendly
Plant produces a steady source of carbon-free power from fission, meeting climate goals.

Made in the U.S.A.
SMR-300 small modular reactor is designed and manufactured at Holtec’s Krishna P. Singh Technology Campus in Camden, New Jersey. This waterfront facility located on the Delaware River features a state-of-the-art manufacturing plant and engineering offices.
Approximate Thermal Power
(for each unit)
1000 MWth
Electrical Power
(net)
>320 MWe
Design Life
80 Years

Helping the World Prosper
Over three-fourths of the earth’s land mass is semi-dark or completely dark. Electricity is essential for quality of life and powering industries. Our goal is to light up the world and spur economic growth without producing greenhouse gases.
Did you know that SMR-300 can operate in “Island Mode?”
Did you know that SMR-300 aims to redefine nuclear safety boundaries?
Did you know that SMR-300 delivers big power with a lean team?
Did you know that SMR-300 is much more efficient than other small nuclear reactors?
Did you know the first SMR-300 will be built and operated at Palisades in Michigan?
Holtec’s SMR-300 design, licensing and construction team is diligently finalizing the SMR-300 design and preparing the first part of the construction permit application (CPA Part I) to the NRC by December 2025. This will include a full environmental report and a limited work authorization to allow certain construction activities on the Palisades SMR-300 to begin in mid-2027. Siting the SMR-300 adjacent to the existing Palisades power plant unique synergies and efficiencies for the cost of operation, leveraging existing personnel, property and infrastructure.
Did you know that SMR-300 solves the economies-of-scale by optimizing a single plant with two reactors?
Did you know the SMR-300 spent fuel pool is inside containment?
Did you know the SMR-300 Instrumentation & Control (I&C) platform is being designed and integrated by the Holtec SMR and Mitsubishi Electric (MELCO) teams?
Did you know the SMR-300 is being designed using a fully integrated SMARTPLANT 3D Model?
Did you know the SMR-300 Ultimate Heat Sink (UHS) surrounds the Containment Structure (CS)?
Did you know the SMR-300 does not require safety related AC power?
Did you know the SMR-300 Reactor Coolant System (RCS) is designed using a Once-Through Steam Generator (OTSG) with Integral Pressurizer (PZR)?
Did you know the SMR-300 is designed for minimal main control room staffing?
Because of this high degree of automation—including automated control and safety actuation—the role of MCR operators during abnormal events is focused on monitoring plant conditions and verifying the correct response of the HSI.
For a two-unit SMR-300 plant, the full on-shift crew also includes a Shift Manager (licensed SRO), a Field Support Supervisor (licensed SRO), and several non-licensed field operators (NLOs).
This staffing concept will be validated through the Human Factors Engineering (HFE) Staffing and Qualification process per NUREG-0800, Chapter 18, and Holtec plans to pursue an exemption to 10 CFR 50.54(m) based on the SMR-300’s automation capabilities and control design.
Did you know the SMR-300’s major structures, systems, and components (SSCs) will be manufactured by Holtec’s U.S.-based production fleet?
These ASME-certified plants are fully equipped to manufacture the SMR-300’s principal mechanical and structural components, including the Reactor Pressure Vessel (RPV), the Once-Through Steam Generator (OTSG) with integral Pressurizer, and the modular steel-concrete structural assemblies that comprise the nuclear island.
Holtec’s current manufacturing strategy supports a baseline production capacity of two SMR-300 units per year, with future expansion envisioned through the planned Holtec Heavy Industries (HHI) facility to meet expected fleet deployment demand.
Did you know Holtec has partnered with Hyundai Engineering & Construction (HDEC) for the construction and delivery of the SMR-300?
Under this partnership, HDEC is responsible for detailed Balance of Plant (BOP) design and full-scope plant construction of the SMR-300, supporting Holtec’s deployment model both in the U.S. and globally. HDEC brings proven capabilities in modular construction, cost control, and delivery of large-scale energy infrastructure projects.
In 2023, HDEC was ranked 11th globally in Engineering News-Record’s Top 250 International Contractors list, reinforcing their position as a premier EPC provider and a key partner in the successful realization of Holtec’s SMR-300 program.




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