Precision Parts Archives

Precision-Etched Components in Small Modular Reactor (SMR) Manufacturing

brizzle on April 28, 2026

Small modular reactors (SMRs) are rapidly emerging as a practical, scalable solution for modern nuclear energy needs. Designed to deliver reliable, low-carbon power with enhanced safety and flexibility, SMRs are reshaping how engineers approach reactor design, deployment, and long-term operation. As interest grows across utilities, governments, and private industry, the success of these systems depends on one critical factor: component precision.

Unlike traditional large-scale systems found in conventional nuclear power plants, SMRs rely on compact, highly integrated architectures. This places greater emphasis on dimensional accuracy, material performance, and reliability at the component level. Even minor inconsistencies in geometry, surface condition, or material integrity can impact neutron behavior, thermal efficiency, or long-term system stability.

At PEI, we specialize in precision photochemical etching of thin metal components for high-performance applications. As a U.S.-based manufacturer with decades of experience supporting aerospace, medical, and nuclear programs, we deliver scalable, high-quality parts with tight tolerances and rapid turnaround.

This article explores how precision-etched components support SMR design and performance and examines why photochemical etching is uniquely suited to advanced reactor applications.

Why Precision Components Matter in Nuclear Power and Small Modular Reactors (SMRs)

In any reactor system, precision is directly tied to performance, safety, and regulatory compliance. In small modular reactors (SMRs), where systems are more compact and tightly integrated, the margin for error is even smaller.

Neutron Flux Management and Heat Transfer

SMRs must maintain precise control over neutron flux to sustain stable reactions. Components such as absorbers, grids, and shielding elements must be manufactured with consistent geometries to ensure predictable neutron interaction. Any deviation can affect reactor efficiency and safety.

Similarly, heat transfer systems, often involving compact exchangers and microchannel structures, depend on accurate channel geometry and smooth surfaces. These features directly influence cooling performance and overall system efficiency.

Reducing Mechanical Failure Risk

Reactor components are exposed to extreme environments, including high temperatures, radiation, and pressure fluctuations.

Mechanical stress introduced during manufacturing can lead to:

Microcracking
Distortion
Premature material failure

Precision manufacturing methods that minimize stress are critical to long-term reliability.

Meeting Regulatory Standards

SMR components must meet strict nuclear regulatory requirements.

Regulatory requirements include:

Material traceability
Dimensional consistency
Repeatable manufacturing processes

Precision-etched components support these requirements by enabling controlled, repeatable production without introducing variability.

Compatibility with Nuclear-Grade Materials

Materials such as hafnium, zirconium, and beryllium copper are commonly used in reactor environments due to their neutron absorption and mechanical properties. These materials can be difficult to machine, making photochemical etching an ideal alternative.

Precision-Etched Components in SMR Systems

Precision-etched components are used throughout SMR systems to support both structural and functional performance.

Some of the most common components include:

Neutron Absorbers

Hafnium and boron-based materials are widely used as neutron absorbers in nuclear reactors, where precise performance is critical. These components require uniform perforations, consistent thickness, and high dimensional accuracy to ensure predictable neutron behavior.

Photochemical etching provides precise control over these features, enabling consistent geometry and reliable neutron interaction across the entire component.

Fuel Support Grids and Spacers

Fuel assemblies rely on grids and spacers to maintain precise alignment and spacing throughout the reactor. These components must withstand high temperatures, maintain structural integrity, and avoid introducing stress points that could impact long-term performance.

Photochemical etching produces flat, stress-free geometries that help ensure consistent positioning and support stable reactor operation over time.

Heat Exchangers and Microchannel Components

Advanced SMRs often incorporate compact heat exchangers and microchannel structures to improve thermal efficiency within limited space. These components play a critical role in managing heat and maintaining system performance.

Photochemical etching enables fine channel geometries, smooth flow paths, and consistent feature accuracy, all of which contribute to high heat transfer efficiency.

These capabilities are essential for systems designed to support electricity generation in compact, high-performance environments.

Precision Brackets and Instrumentation Components

Instrumentation systems require highly accurate mounting and alignment components. These parts must maintain dimensional stability over time, even under thermal and radiation exposure.

Etched components provide the precision needed for consistent performance.

Design Considerations for SMR Components

Designing components for SMRs involves balancing performance, manufacturability, and regulatory compliance.

To ensure precision and performance, the following considerations must be taken into account during the design process:

Material Selection

Material selection plays a critical role in SMR component performance, influencing everything from neutron behavior and thermal stability to corrosion resistance and long-term reliability.

Common materials include:

Hafnium for neutron absorption
Zirconium for corrosion resistance and structural stability
Beryllium copper for mechanical performance

Each material presents unique challenges in machining, particularly in thin sections.

Geometry and Feature Complexity

Geometry plays a critical role in SMR component performance, particularly in systems where space is limited and precision is essential.

SMR components often include:

Thin walls
Perforations
Complex internal features

Traditional manufacturing methods struggle to produce these features without distortion.

Tolerances and Alignment

Maintaining tight tolerances is essential to ensure proper alignment and consistent performance within SMR systems.

Maintaining tight tolerances is critical to avoid:

Reactor misalignment
Uneven heat distribution
Inconsistent neutron behavior

Photochemical etching enables precise dimensional control across complex geometries.

Stress Management

Managing stress during manufacturing is vital to preserving material integrity and long-term component reliability.

Mechanical and thermal stresses introduced during manufacturing can compromise material integrity. Photochemical etching eliminates:

Heat-affected zones
Mechanical deformation

This results in components that maintain their original properties.

Prototyping and Iteration

SMR designs are evolving rapidly, particularly as part of initiatives like the advanced reactor demonstration program.

Low tooling costs associated with etching allow engineers to prototype and iterate designs quickly, accelerating development timelines.

Why Photo Etching is the Ideal Process for SMR Parts

Photochemical etching offers several advantages that make it particularly well-suited for nuclear applications.

Stress-Free Manufacturing

The process removes material chemically rather than mechanically, eliminating stress that can cause cracking in brittle alloys.

High Precision for Complex Geometries

Unlike traditional machining methods, photo etching enables:

Fine features
Tight tolerances
Intricate patterns

These capabilities are essential for advanced reactor components.

Consistent Perforations and Edge Quality

Uniform perforations are critical in neutron absorber applications. Etching produces consistent, burr-free features that support predictable performance.

Scalability

Photochemical etching supports both low-volume prototyping and high-volume production, making it suitable for evolving SMR programs.

Traceability and Marking

Etched components can include markings for traceability, supporting compliance with the standards required in the highly-regulated nuclear industry.

How PEI Supports SMR Component Design

PEI has developed a proven track record of providing comprehensive support for engineers working on SMR systems and advanced nuclear reactors. Our in-house engineering team collaborates closely with customers to evaluate material selection, optimize designs, and improve manufacturability from the earliest stages of development. This hands-on approach ensures components are designed for both performance and production efficiency.

We also bring deep material expertise and maintain stock and sourcing for nuclear-grade materials to ensure consistency, availability, and compliance with strict industry requirements. This allows us to support projects with confidence, even when working with specialized or hard-to-source alloys.

Our team supports fast development cycles through rapid prototyping and scalable production, enabling engineers to move efficiently from concept to production. Combined with our proven experience supporting OEMs across aerospace, medical, and nuclear sectors, we deliver high-reliability components that meet the demands of critical applications.

The Role of Precision in Power Generation and Advanced Reactors

The evolution of power generation is closely tied to advancements in reactor design. SMRs and other advanced reactors are enabling new approaches to energy production, including:

Distributed energy systems
Hybrid energy systems integrating renewables
Applications in remote or mobile environments, such as a floating nuclear power plant

These systems often rely on passive safety features, reducing dependence on external power and improving resilience.

Emerging reactor concepts, such as the integral molten salt reactor and stable salt reactor, further emphasize the importance of precision manufacturing. These designs require components capable of withstanding extreme temperatures and corrosive environments while maintaining tight tolerances.

SMRs are also playing a growing role in nuclear waste management, enabling more efficient use of fuel and improved long-term sustainability.

The Evolving Landscape of SMRs and Advanced Reactors

The development of SMRs and advanced reactors is closely tied to the evolution of existing nuclear technologies and global regulatory frameworks. While SMRs introduce new design flexibility, they still build on principles established in conventional reactors, including the management of the nuclear chain reaction and the use of proven materials and fuel systems.

Many SMR designs draw from the operational experience of light water reactors, which remain the most widely deployed reactor type for electrical power generation. These systems typically use low-enriched uranium as their primary fuel source, and similar fuel strategies are being adapted for newer SMR platforms to ensure safety, efficiency, and regulatory alignment.

Global oversight from organizations such as the International Atomic Energy Agency, the Nuclear Regulatory Commission, and the Nuclear Energy Agency continues to shape how SMRs are designed, tested, and deployed. These bodies establish guidelines that influence everything from material selection to manufacturing precision, ensuring that components meet strict safety and performance standards.

Emerging designs, including fast neutron reactors and other next-generation systems, are expanding the possibilities of nuclear energy. Many of these concepts are being validated through prototype reactor programs, where precision components play a critical role in proving performance and reliability under real-world conditions.

Within these systems, components such as the steam generator remain essential for transferring heat into usable energy, while advanced fuel and cooling strategies improve efficiency and reduce waste. SMRs also open new opportunities for deployment in municipal power systems, providing scalable and reliable power solutions for smaller grids and remote locations.

As reactor designs continue to evolve, the need for precision manufacturing only increases. From managing uranium fuel behavior to supporting advanced cooling systems, every component must perform consistently within tightly controlled parameters, reinforcing the importance of high-precision fabrication methods like photochemical etching.

Precision Manufacturing in Nuclear Energy Research

Ongoing nuclear energy research continues to push the boundaries of reactor design. Engineers are exploring new materials, geometries, and cooling methods to improve performance and safety.

Precision-etched components support this innovation by enabling:

Rapid prototyping
Complex geometries
Reliable performance

These capabilities are essential for advancing SMR technology and expanding its role in global energy systems.

Partner with the Leaders in SMR Reactor Design and Precision SMR Components

Precision-etched components are not just supporting elements; they’re critical to the success of modern SMR systems. From neutron absorbers to heat exchanger components, these parts directly influence performance, safety, and reliability.

By leveraging the precision of the photochemical etching process, engineers can achieve the accuracy and material integrity required for next-generation reactor designs.

At PEI, we stand ready to support your SMR project with expertise, advanced manufacturing capabilities, and a commitment to quality.

We design and manufacture SMR components with the precision, consistency, and reliability required to meet the challenges of this rapidly evolving sector.

Partner with PEI to develop high-performance components for your next SMR application.

If you’re ready to get started, talk with our team or request a quote.

What Engineers Should Know About EMI Shielding Design

brennan on January 27, 2026

Learn why engineers combine laser cutting and chemical etching for high-precision parts, and how hybrid manufacturing improves accuracy, speed, and design freedom.

Why Engineers Combine Laser Cutting and Chemical Etching in High-Precision Applications

brennan on January 27, 2026

Modern engineering challenges are rarely solved with a single manufacturing method. As components shrink, tolerances tighten, and performance demands rise, traditional manufacturing methods often fall short. To meet these evolving requirements, engineers are increasingly turning to hybrid manufacturing— a strategy that combines multiple processes to achieve results no single method can deliver alone.

One of the most powerful hybrid approaches in precision metal manufacturing is laser cutting and etching. When used together, these two processes allow engineers to balance speed, precision, geometry, and material integrity in ways that fundamentally change what’s possible in thin‑metal part design.

At Photofabrication Engineering, Inc. (PEI), laser cutting and photochemical etching are not competing technologies but complementary tools. By offering both processes in‑house and designing workflows that intentionally combine them, PEI helps engineers push boundaries in key industries like aerospace, electronics, defense, photonics, and medical manufacturing.

In this article, we explore why engineers combine laser cutting and chemical etching, how hybrid manufacturing delivers superior results, and why PEI’s integrated approach gives customers a measurable advantage from prototype through production.

Why Hybrid Manufacturing Matters Today

Hybrid manufacturing reflects a broader shift in engineering priorities. Modern parts must be lighter, thinner, more precise, and more reliable, often all at once. Traditional manufacturing methods, while proven, struggle to meet these requirements alone.

Laser cutting excels at producing fast, accurate outer profiles. Chemical etching excels at producing fine internal features with zero mechanical stress. Used independently, each method has limits. Used together, they unlock new levels of performance, consistency, and design freedom.

Engineers no longer ask, “Which process should I use?”
They ask, “How do I combine processes to get the best result?”

That question is at the heart of PEI’s hybrid manufacturing philosophy.

Why Combine Laser Cutting and Etching?

Laser Cutting: Precision and Speed Where It Counts

Laser cutting is ideal for defining external geometries, trimming outlines, and producing rapid prototypes. A focused laser beam can quickly and repeatably cut complex outer shapes without tooling.

Because the laser cutting process is digitally driven, engineers can move from CAD to part in days rather than weeks. This makes laser cutting especially valuable during early design iterations or when turnaround time is critical.

However, laser cutting alone is not ideal for everything. Extremely fine internal features, tight spacing between apertures, and thin foils can introduce heat‑affected zones, micro‑burrs, or edge irregularities when cut solely with a high-powered laser beam.

Chemical Etching: Precision Without Stress

Chemical etching removes material through controlled chemistry rather than force or heat. The etching process produces perfectly burr‑free edges, uniform internal features, and consistent thickness, regardless of complexity.

Etching is especially effective for:

Dense internal patterns
Fine slots and apertures
Thin metals and foils
Stress‑sensitive components

Because material is removed evenly from both sides, etched features remain flat and dimensionally stable, even in ultra‑thin sections.

Together: Maximum Precision Without Compromise

When combined, laser cutting and etching give engineers the best of both worlds:

Laser cutting defines fast, precise outer profiles
Etching refines internal geometry and fine details
Material properties remain intact
Secondary deburring or finishing is often eliminated

At PEI, engineers routinely design parts that leverage two processes intentionally, using each exactly where it performs best.

The Advantages of Hybrid Manufacturing

Hybrid manufacturing is not about redundancy; it’s about optimization. Here is why more and more engineers are choosing the hybrid model:

Complex Geometry Without Tradeoffs

By combining processes, engineers can create parts with:

Sharp external profiles
Dense internal patterns
Tight spacing between features
Consistent dimensional accuracy

This is especially important for intricate designs that would be distorted, warped, or prohibitively expensive using a single method.

Superior Results in Thin and Difficult Metals

Many precision applications involve various materials that are difficult to machine mechanically, including ultra‑thin foils and specialty alloys. Hybrid workflows allow PEI to adapt processing strategies based on material behavior rather than forcing one method to do everything.

This flexibility is critical when working across different materials with varying thermal and mechanical properties.

Reduced Secondary Operations

Mechanical cutting often requires deburring, polishing, or stress relief. Chemical etching does not. When etching is used for internal features and laser cutting for outlines, many secondary steps disappear, reducing cost, risk, and lead time.

Optimized Cost and Lead Time

Laser cutting is fast and flexible. Etching is precise and repeatable. Together, they create an affordable option for complex parts that would otherwise require expensive tooling or multi‑step machining.

This is why hybrid manufacturing is rapidly becoming the preferred model across high‑precision industrial applications.

Key Applications of Laser Cutting and Etching

Hybrid manufacturing supports a wide range of advanced technologies where precision, reliability, and performance are non‑negotiable.

Medical Devices

Medical components often combine thin metals, fine features, and strict cleanliness requirements. Hybrid manufacturing enables:

Catheter components with laser‑cut outlines and etched internal features
Stents and filters with burr‑free apertures
Precision medical screens with consistent geometry

Laser cutting defines form. Etching refines function.

Aerospace Systems

Aerospace applications demand lightweight, high‑performance components with absolute dimensional consistency. Hybrid manufacturing is ideal for:

Light shielding
Fuel injector screens
Microfluidic flow control parts

By combining processes, PEI delivers aerospace parts that maintain strength without distortion.

Photonics and Optical Systems

Photonics components require extreme precision to control light paths and beam alignment. Hybrid manufacturing enables:

Optical apertures
Light‑control grids
Precision alignment shims

The ability to control both external and internal geometry is critical in these systems.

Electronics and RF Systems

Electronics benefit from hybrid manufacturing, where electrical performance depends on geometry. Typical applications include:

RF shields
Connector plates
Precision shims and spacers

Etched features ensure uniform signal behavior, while laser cutting maintains clean external profiles.

In‑House Efficiency: The PEI Difference

Hybrid manufacturing only works when processes are tightly integrated. At PEI, laser cutting and etching are performed under one roof, eliminating delays, misalignment, and cross‑vendor risk.

By keeping everything in‑house, customers gain access to a single supplier and a single quality system. For customers, this means:

Turnaround times are faster
Quality control is consistent
Registration between processes is precise
Accountability is clear

There is no handoff risk and no guesswork between suppliers.

PEI’s in-house efficiency also offers customers unmatched prototype-to-production flexibility. It allows engineers to prototype quickly using laser cutting, refine details through etching, and then scale directly into production without redesign.

This flexibility is supported by our collaborative design optimization process. Our engineers work closely with customers to evaluate which features are best suited for laser cutting and which benefit from chemical etching. We also help determine the optimal sequencing of each step to maximize precision, efficiency, and material integrity.

By integrating design support early in the development cycle, we ensure the combined laser cutting and etching workflow performs as intended from first article to full-scale production.

PEI’s Precision Laser Cutting Machines and Process

PEI’s laser cutting capabilities are engineered for precision, flexibility, and repeatability.

Our state‑of‑the‑art laser systems support both cutting and marking, offering a cleaner, more precise alternative to traditional plasma or mechanical methods.

Our advanced laser cutting equipment includes:

IPG 4kW Fiber Laser
This system supports high‑speed cutting across a wide range of metal thicknesses and alloys using a modern fiber laser architecture.
Keyence Fiber Laser Marking System
Used for permanent identification, traceability, and compliance through advanced laser marking methods. This includes serial numbers, barcodes, and QR codes.
Optical Alignment System
Enables precise registration between etched and laser‑cut features, ensuring perfect alignment across processes.

Unlike older systems, our modern laser machine technology delivers tighter tolerances, finer edge quality, and greater design flexibility than legacy equipment such as YAG systems or mechanical cutters.

What About Laser Engraving?

While laser cutting and etching define part geometry, laser engraving plays a critical role in traceability and identification. Using focused laser processes, PEI can apply high-contrast, permanent markings, such as serial numbers, barcodes, and logos, directly to the material surface without altering part dimensions.

When the beam hits the surface, controlled laser power vaporizes just enough material to create a crisp, durable mark suitable for regulatory compliance and part tracking. This technique supports a wide range of metals and alloys and integrates seamlessly into PEI’s hybrid manufacturing workflow, ensuring consistent results across both simple and complex components.

Hybrid Laser Etching: The Future

As component requirements continue to tighten, hybrid manufacturing will only become more essential.

Emerging technologies demand:

Smaller features
Higher precision
Greater material integrity
Faster development cycles

No single process can meet all of these demands alone.

Hybrid manufacturing, especially the combination of laser cutting and chemical etching, represents the future of precision metal fabrication. It allows engineers to design without compromise and manufacture with confidence.

At PEI, this future is already in production.

Precision Without Compromise

Combining laser cutting and chemical etching allows engineers to achieve maximum precision, geometric complexity, and material integrity in parts that would be difficult or impossible to manufacture using a single method.

From medical devices to aerospace systems, photonics to electronics, hybrid manufacturing enables smarter designs, faster timelines, and more reliable results.

By offering both capabilities in‑house, PEI empowers engineers to push boundaries, reduce risk, and bring high‑precision components to life.

By leveraging both processes, we can deliver parts with complex geometries, minimal distortion, and precise overlays, all without the need for multiple vendors. Our optical registration ensures perfect alignment, reducing turnaround time and ensuring consistent quality.

The result? A complete metal fabrication solution with greater design freedom, faster prototyping, and reduced costs.

Ready to Push Precision Further?

Talk to our engineers about combining laser cutting and etching for your next high‑precision project.

Contact us today or Request a Quote.

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brennan on May 9, 2025

Discover how precision chemical machining enhances microelectronic design by delivering unmatched accuracy, material integrity, and cost efficiency. Learn how PEI’s expertise drives innovation in semiconductors, EMI shielding, and MEMS components.