Nuclear new build refers to the construction of new nuclear power plants, research reactors, or nuclear fuel cycle facilities. The nuclear new build sector has seen significant activity globally, driven by decarbonization targets, energy security considerations, and the development of new reactor technologies including large Gen III+ designs and small modular reactors (SMRs). New build projects require the full integration of nuclear safety, quality assurance, regulatory licensing, construction management, and commissioning disciplines across a period that typically spans a decade or more.
An Owner’s Engineer (OE) is the technical and strategic advisor who supports the nuclear project owner throughout planning, design, procurement, construction, and commissioning. Nuclear projects are complex, multi-decade undertakings involving thousands of interfaces. The OE strengthens the owner’s capability to make informed decisions, manage risks, and maintain oversight of vendors and contractors.
Key FunctionsWhy It Matters: The OE helps the owner maintain control of the project, avoid costly errors, and ensure that safety, quality, and regulatory expectations are met from day one. The OE typically employs experienced nuclear professionals that can bring knowledge and experience that new Owners may not posses.
In nuclear construction, inspections are conducted before work is concealed — not after. Systematic reviews at defined hold points ensure that quality is verified at the source, with no reliance on post-installation fixes. This proactive approach confirms that safety-critical components meet design and regulatory requirements before they are embedded in concrete, insulation, or structural assemblies.
⚡ Bottom Line: In nuclear construction, quality isn’t inspected in — it’s built in. Early, systematic inspections ensure that every layer of the plant is founded on verified excellence.
The order in which construction activities are performed directly impacts both quality and schedule. Proper sequencing ensures that systems are installed in a logical, accessible manner — preventing rework, delays, and missed inspection opportunities. Strategic planning of construction steps supports efficient workflows and safeguards long-term performance.
⚡ Bottom Line: Construction sequencing isn’t just about order — it’s about foresight. By planning each step with quality and access in mind, teams build smarter, faster, and safer.
Heavy lifts in nuclear facilities involve the movement and installation of large, high-value components such as reactor vessels, steam generators, modules and shielding structures. These operations demand comprehensive planning and disciplined execution to protect personnel, equipment, and plant integrity.
⚡ Bottom Line: Heavy lifts are high-stakes operations. Engineered rigging, qualified personnel, and rigourous testing ensure that each component is installed safely, accurately, and without compromise.
Nuclear-grade concrete demands meticulous control during placement to ensure long-term strength, durability, and safety. Temperature monitoring, vibration techniques, and controlled curing procedures are essential to achieving the structural integrity required for containment structures, foundations, and safety-critical components. Every step is executed with precision to meet nuclear construction standards.
⚡ Bottom Line: In nuclear construction, concrete isn’t just poured — it’s engineered. Through precise placement control and rigorous monitoring, operators ensure that every structure meets the highest standards of safety and performance.
Nuclear construction demands rigourous quality control far beyond conventional industry practices. Through hold points, witness points, and systematic inspection protocols, every stage of construction is verified to meet exacting safety, reliability, and regulatory requirements. This disciplined approach ensures that critical systems are built right — the first time.
⚡ Bottom Line: In nuclear construction, quality isn’t just a goal — it’s a guarantee. Through disciplined control points and rigorous inspection, operators ensure that every component meets the highest standards of safety and performance.
Commissioning is more than a startup milestone — it’s a foundational process that generates verified data for long-term plant operation. The results of commissioning tests establish operating baselines, while comprehensive documentation of as-built conditions guides future operations, maintenance, and safety assessments.
⚡ Bottom Line: Commissioning results are the foundation of safe, efficient nuclear operation. By establishing baselines and capturing as-built conditions, they ensure that future decisions are grounded in verified, traceable data.
Power ascension is a controlled, multi-stage process that verifies reactor performance as power levels increase. Each plateau is carefully planned and tested to confirm system behaviour, safety margins, and operational readiness before proceeding to the next level. This stepwise approach ensures a safe, validated transition to rated power.
⚡ Bottom Line: Power ascension is not a single event — it’s a disciplined, data-driven process. By testing each power level before advancing, nuclear plants ensure safe, reliable operation as they approach rated output.
Initial fuel loading is a pivotal milestone in nuclear plant commissioning. It marks the transition from construction to nuclear operation and demands meticulous planning, procedural rigour, and safety oversight. While all reactor types require systematic loading protocols, the role of criticality safety varies by design.
⚡ Bottom Line: Initial fuel loading is a disciplined, safety-critical operation tailored to reactor design. CANDU reactors rely on inherent geometry for subcritical assurance, while PWRs and BWRs require active criticality controls — but all designs follow rigorous procedures to ensure safe, verified transition to nuclear operation.
Pre-operational testing ensures that nuclear systems perform as designed before any radioactive operation begins. These systematic test programs validate safety functions, confirm equipment readiness, and provide documented assurance that all systems meet licensing and operational requirements.
⚡ Bottom Line: Pre-operational testing is a critical milestone in nuclear commissioning. It transforms design intent into verified performance, ensuring that safety systems are ready before the introduction of nuclear fuel.
New nuclear builds that are first-of-a-kind, first-in-a-while, or first-in-a-country present unique challenges and strategic opportunities. These builds often combine novel technologies, reactivated supply chains, and emerging regulatory interfaces. Success depends on rigorous planning, stakeholder alignment, and proactive risk mitigation.
"First doesn’t mean fragile—it means foundational." Every risk mapped, every lesson learned, and every system commissioned is a step toward national capability and global credibility.
Let’s build with foresight, govern with rigour, and lead with confidence.
Localization refers to the strategic integration of domestic industry, workforce, and supply chain capabilities into the design, construction, and operation of new nuclear facilities. Enhancing localization potential strengthens national resilience, reduces reliance on foreign vendors, and maximises socio-economic benefits. It also supports long-term sustainability, regulatory alignment, and public confidence.
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The IAEA Milestones Approach provides a phased framework for countries embarking on a nuclear power programme. It outlines key actions, decision points, and infrastructure requirements to ensure that nuclear development proceeds safely, securely, and sustainably. The approach supports informed decision-making, stakeholder engagement, and international confidence in programme maturity.
Each phase requires progress across 19 infrastructure areas:
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"Milestones aren’t deadlines—they’re declarations of readiness." Every phase completed, every infrastructure issue addressed, and every stakeholder engaged is a step toward safe, secure nuclear deployment.
Let’s plan with clarity, progress with confidence, and operate with integrity.
Fall hazards are among the most serious risks in industrial and nuclear environments. During new-build projects, the safest fall protection strategy is prevention through design. By minimizing the need for fall arrest systems and embedding permanent safeguards into layouts, vendors help ensure that routine operations, maintenance, and IAEA inspections can be performed safely and efficiently.
"Fall protection starts with design—not with a harness." Every platform installed, every ladder avoided, and every anchor point placed is a proactive step toward zero harm. Fall risks are predictable—and preventable.
Let’s design with elevation in mind, protect with permanence, and lead with foresight.
Machine guarding is a frontline defense against injury in industrial environments. Whether during construction, commissioning, or operations, properly designed guards prevent contact with moving parts, flying debris, pinch points, and energy sources. In nuclear and utility settings, guarding isn’t optional—it’s engineered safety.
"If it moves, guard it." Machine guarding reflects a proactive mindset—engineering out the hazard before it becomes a headline. Every installed guard is a silent promise: that safety is built in, not bolted on.
Let’s guard with intention, inspect with discipline, and operate with confidence.
Confined spaces pose serious risks in industrial environments, including oxygen deficiency, toxic exposure, and restricted rescue access. In nuclear projects, confined space hazards must be addressed early—through design, engineering controls, and strict procedural safeguards. The goal is simple: eliminate the hazard before it becomes a rescue scenario.
"A confined space is not just a location—it’s a decision." Every entry avoided, every hazard engineered out, and every rescue plan validated is a step toward zero harm. Confined space safety begins at the drawing board and ends with disciplined execution.
Let’s design with foresight, control with precision, and protect with purpose.
In nuclear new-build projects, or indeed during and plant construction or modification activity, maintenance doesn’t start after turnover—it starts the moment equipment arrives on site. Systems, Structures and Components (SSCs) must be actively preserved throughout construction and commissioning to prevent degradation, ensure operability, and uphold licensing commitments.
"A neglected component is a future failure." Maintenance during new-build is not optional—it’s foundational. Every preserved pump, protected valve, and inspected panel is a step toward safe startup and long-term reliability.
Let’s maintain with foresight, document with discipline, and hand over with confidence.
Cement is foundational to nuclear new-build projects—literally. From reactor foundations to containment structures, high-performance concrete ensures structural integrity, radiation shielding, and long-term durability. But cement production is also carbon-intensive, contributing nearly 8% of global CO₂ emissions. That’s why modern nuclear builds must pair infrastructure ambition with environmental responsibility.
Many cement suppliers supporting nuclear builds align with ISO 14001 for environmental management and ISO 19650 for digital construction workflows. These standards ensure traceability, sustainability, and quality across the supply chain.
Let’s build nuclear infrastructure with strength, precision, and a lighter footprint.
Concrete doesn’t have to be carbon-heavy—if we design, source, and cure with purpose.
As the nuclear industry embraces the potential of Small Modular Reactors (SMRs), a strategic approach to deployment is crucial for success. SMRs offer unique advantages, from enhanced safety features to scalable power generation, making them a promising solution for the next generation of nuclear energy.
"With strategic planning and collaboration, the nuclear industry can harness the full potential of SMRs to shape a sustainable energy future." By addressing deployment challenges and leveraging the unique advantages of SMRs, nuclear professionals can lead the way in building the next generation of nuclear power.
Safety must be embedded from the first drawing to the final pour. New builds aren’t just construction projects—they’re cultural blueprints. The decisions made during design, procurement, and early staffing shape the safety posture of a facility for decades. Safety culture must be foundational, not an afterthought.
In nuclear environments, this means orienting all personnel—not just licensed operators or safety specialists—to the principles of nuclear safety. Civil engineers, project managers, contractors, and corporate leaders must understand the stakes: defense-in-depth, conservative decision-making, and the consequences of latent design flaws. Safety isn’t just technical—it’s behavioral, procedural, and cultural.
Safety is a foundation—not a retrofit.
Once concrete is poured and systems are energized, culture becomes harder to shape. Build it right, build it safe, build it to last.
Contractors must meet the same safety standards as full-time staff. In nuclear operations, safety culture must be consistent across all contributors—regardless of employment status. Oversight, onboarding, and engagement ensure that every person on site operates with the same vigilance, discipline, and accountability.
Contractor performance directly affects plant safety, regulatory compliance, and public trust. That means safety expectations must be clear, enforced, and embedded from day one.
Safety culture is not selective—it’s systemic. Every contributor must feel empowered to speak up, follow procedures, and challenge unsafe conditions. Contractors are not guests—they’re guardians of safety alongside staff.
Safety is not outsourced.
Let’s onboard with care, monitor with consistency, and lead with inclusion.
Commissioning is the bridge between construction and operation. It’s the moment when systems are tested, validated, and proven ready to perform safely and reliably under real-world conditions. In nuclear facilities, commissioning is not just a milestone—it’s a critical safety function that confirms readiness and reinforces trust.
Commissioning is not just technical—it’s cultural. It demands transparency, discipline, and a questioning attitude. Every test is an opportunity to learn, improve, and reinforce safety. It’s where assumptions are challenged, systems are proven, and safety is confirmed.
Let’s execute commissioning with rigor, clarity, and care.
In nuclear projects, construction management is more than coordination—it’s control. It ensures that every structure, system, and component is built to exacting standards, with safety embedded from foundation to final turnover. This phase sets the tone for operational integrity, regulatory confidence, and long-term performance.
Construction is not just about building—it’s about building safely. Every action must reflect a commitment to excellence, accountability, and conservative decision-making. Safety culture begins in the field, not the control room.
In nuclear construction, there are no shortcuts.
Let’s build it right, document it fully, and deliver it safely.
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