Nuclear

Heat Exchangers for

Nuclear Power Applications

Engineered for Reliability in the World’s Most Demanding Environments

Thermal Engineering International (TEi) is a trusted provider of high-performance heat exchangers designed specifically for nuclear power plant systems. Backed by decades of engineering expertise and a deep understanding of nuclear industry standards, TEi delivers precision-built solutions that ensure safety, reliability, and long-term thermal efficiency.

From critical cooling systems to auxiliary support applications, TEi heat exchangers are engineered to meet the rigorous demands of nuclear power generation, supporting both PWR and BWR plant designs, as well as advanced and next-generation reactor technologies.

Why TEi for Nuclear Heat Exchangers?

Proven performance across operating nuclear fleets
Deep technical knowledge of ASME Section III, RCC-M, and international nuclear codes
In-house engineering and manufacturing for full design control
Legacy data and experience to support aging fleet replacement and modernization

Designed for safety. Built for longevity. Delivered with precision.
Partner with TEi for nuclear-grade heat exchanger solutions you can trust.

Contact Our Nuclear Solutions Team

Nuclear Plant

Nuclear

Moisture Separator Reheaters – MSR

At TEi, we are recognized worldwide as a premier supplier and technology leader in Moisture Separator Reheaters – MSR. With decades of experience in designing, fabricating, installing, troubleshooting and upgrading MSR, our expert engineering team delivers innovative solutions that enhance plant thermal performance and ensure long term equipment reliability and system operability.

Our team of dedicated specialists manage every aspect of MSR projects—from uprate studies to design and testing to installation and user training. Independent of any turbine original equipment manufacturers ( OEM ), TEi collaborates with our clients to provide optimized MSR design solutions for any architectural configuration, inclusive of horizontal or vertical orientation, single or dual stage reheat, internal or external header and side or bottom inlet vessels. We have custom designed and supplied hardware for all imaginable configurations from internal upgrades of Reheater or Moisture Separator ( MS ) system designed for efficient installation into the existing shells to complete vessels for new and existing plants to meet and exceed thermal performance guarantees and thoroughly address all OEM design deficiencies ensuring lifetime, maintenance free operation.

MSRs are the bridge between the High and Low-Pressure Turbines.
No alternative flow path exists but through the large and unique, dual purpose heat exchangers.
Consequently, an optimally designed MSR sourced from a proven supplier is fundamentally critical to the operability and heat rate efficiency of the Power Generating Function of Nuclear Power Stations.

Minimize vessel weight (important for power uprates) by employing an elegant design void of extraneous flow discontinuities and eliminating complex, inefficient steam distribution systems
Deliver Moisture Separation Efficiency ( MSE ) of virtually 100% to maximize High and Low Pressure Turbine Work Output and reduce Low Pressure Turbine maintenance due to premature onset of wetness.
Minimize pressure drop enabling increased power ( MWe ) output
Achieve highest attainable superheat outlet steam temperatures, improving plant heat rate and cycle efficiency
Optimize excess steam consumption for stable operation and highest thermal efficiency
Enhance durability with correct metallurgy by deploying corrosion and erosion resistant materials to high velocity, wet steam plenums

Performance: Maximum Moisture Separation Efficiency (MSE) , Minimum Pressure Drop (dP), and Maximum Hot Reheat Superheated Steam temperature (TTD)
Reliability: Advanced material selection and modern analytical design methods eliminate susceptibility to flow induced vibration damage mechanisms and proactively prevent thermal distortion induced structural failures
Operability: Stable, consistent steam admission and condensate removal system operation with smooth, trouble free transient response
Decades of Industry Leadership from a dedicated team of experts
With over 150 complete MSR vessels supplied worldwide, and hundreds of upgrades completed, TEi’s technology has been operationally proven to improve plant heat rate and extend equipment life beyond the design basis of the plant. Our transcendent engineering expertise and commitment to quality ensure your plant operates at peak efficiency with enhanced reliability.

Choose TEi for proven MSR solutions that deliver everlasting performance and dependable value.

Nuclear

Condensers & Modules

As the innovator in heat transfer technology, TEi provides exceptional modular changeout options for steam surface condensers. Modular changeouts are an efficient alternative to the conventional retube. Existing condensers can be refurbished, redesigned, and even upgraded to meet new performance demands and power requirements. Complete surface condenser retrofits are possible and can offer a multitude of benefits. A surface condenser is critical to the efficient operation of a power plant.

Our condenser designs can incorporate enhanced deareation systems, and/or a variety of turbine exhaust options, which can assist in improving plant layouts. We continually address and refine these and other considerations associated with circular designs where space is at a premium. The surface condenser is a critical component in the operation of a steam power plant. Condenser failures can result in forced outages and loss of generation capacity. TEi condensers represent an evolution of advanced technology, offering improved thermal efficiency and advanced mechanical design to reduce forced outages and increase availability.

Feedwater Heater Header

Nuclear

Feedwater Heater

Each feedwater heater can extract up to 30% of the turbine throttle steam and is designed to specific thermal conditions and manufactured for a singular purpose. The low pressure feedwater heaters play a key role in maintaining efficient, trouble-free operation of your generation facility and the vertical channel down (VCD) designs offer a small footprint, piping economics and simplified bundle access.

TEI’s feedwater heaters are each designed to specific thermal conditions and manufactured for a singular purpose. Whether it be sophisticated designs involving extreme superheat, abnormal flow conditions or dissipation of high energy fluids, TEi has the expertise and experience to offer proven solutions to any design problem. TEi provides innovative and practical concepts to ensure peak heater performance from installation to testing through full or part-load operation. We offer a multitude of design configurations for desuperheater and drains cooler zones as well as the latest in channel closure techniques. The three most common are listed below:

Bolted-Gasketed Closure – This economical, gasketed pill box is easily disassembled for full access.
Seal-Welded Diaphragm Closure – This economical welded closure is leak-proof and easily disassembled for full access. It requires no gaskets.
Breech-Lock Closure – This widely accepted, quick opening closure provides full access to the tubesheet and structural reliability under varying temperature and pressure conditions.

Nuclear

Heat Exchangers

Provides essential cooling for non-safety and safety-related components by transferring heat from process systems to ultimate heat sinks.

Ensures thermal management for reactor and turbine auxiliary systems during both normal and emergency operations.

Passive safety systems used in BWRs to remove heat from the reactor core without the need for external power or pumps.

Maintains safe temperature levels for stored spent nuclear fuel, preventing overheating and ensuring long-term storage integrity.

Critical for safe reactor cooldown during shutdowns, maintenance, and emergency operations.

Manages the lubrication and temperature of RCP systems, supporting continuous and efficient core cooling.

Condense and recover steam or process vapors, minimizing losses and maintaining environmental compliance.

Compact heat exchangers designed to cool vent or flash-steam streams, condensing vapors into liquid for recovery while reducing energy loss and emissions. Typical applications include deaerator vents, flash tanks, and process gas vents.

Used in auxiliary systems for water purification and steam generator support.

Removes impurities and maintains water chemistry for both safety and non-safety related systems.

Specialized heat exchangers for polishing or cleanup duty, operating without regeneration cycles. These units reliably remove residual heat or contaminants, supporting downstream purity or thermal balance requirements.

Facilitates safe plant cooldowns, ensuring compliance with safety procedures and cooldown rate limits.