Name: Khmelnytskyi Nuclear Power Plant: Technical Profile and Operational History
Address: UA

Overview

The Khmelnytskyi Nuclear Power Plant (NPP) is a major thermal energy facility located in western Ukraine. Operated by the state-owned enterprise Energoatom, the plant serves as a critical component of the Ukrainian power grid, providing baseload electricity to the region and contributing significantly to the national energy mix. With a total installed capacity of approximately 3,600 MW, it stands as one of the largest nuclear generating stations in the country. The plant's operational status as of 2026 reflects decades of continuous service, beginning with its initial commissioning in 1982. This long history places it among the older but still vital nuclear assets in Eastern Europe, having weathered geopolitical shifts, economic transitions, and the recent pressures of the war in Ukraine.

Location and Regional Context

The facility is situated near the city of Khmelnytskyi, which functions as the administrative center of Khmelnytskyi Oblast. The city is located on the banks of the Southern Bug River, a strategic geographical feature that provides essential cooling water for the nuclear reactors. Khmelnytskyi is the second-largest city in the historical region of Podolia, following Vinnytsia. Its location in western Ukraine has historically offered a degree of geographical buffer compared to the eastern frontlines, although the proximity to active conflict zones has necessitated ongoing logistical and operational adjustments for the plant. The integration of the Southern Bug into the plant's design underscores the importance of hydrological stability for nuclear operations in the region.

Background: The Khmelnytskyi NPP is not a single reactor but a complex of multiple units. The total capacity of 3,600 MW is the aggregate output of its individual reactor lines, each contributing to the grid's stability.

Role in the National Grid

In the context of Ukraine's energy infrastructure, the Khmelnytskyi NPP plays a pivotal role in maintaining grid frequency and voltage stability. Nuclear power provides a relatively constant output compared to the intermittency of wind and solar resources, which are increasingly integrated into the Ukrainian system. The plant's output is fed into the 400 kV transmission network, which is the backbone of the Ukrainian power system. This connection allows for efficient distribution of electricity to industrial consumers in the west and residential areas further east. The reliability of this supply is crucial for the economic activity in Khmelnytskyi Oblast, which includes significant agricultural and manufacturing sectors.

The operational history of the plant dates back to the early 1980s, with the first unit coming online in 1982. This timing coincides with a period of rapid industrial expansion in the Ukrainian Soviet Socialist Republic. The plant has since undergone various modernization efforts to enhance safety and efficiency, adapting to post-Soviet economic conditions and evolving international nuclear standards. As of 2026, the plant remains fully operational, contributing to Ukraine's energy security amidst ongoing regional challenges. The continued operation of Khmelnytskyi NPP highlights the enduring importance of nuclear energy in the country's strategy to diversify its fuel sources and reduce dependence on imported natural gas.

History and Construction

The Khmelnytskyi Nuclear Power Plant (NPP) stands as a cornerstone of Ukraine’s energy infrastructure, situated in the western region of Podolia. Its development reflects the broader Soviet strategy of decentralizing nuclear generation to balance the load on the national grid, particularly in the western territories closer to European interconnections. The decision to construct the facility emerged during the 1970s, a period of rapid industrial expansion in the Ukrainian SSR. Engineers selected the site near the city of Khmelnytskyi, leveraging its proximity to the Southern Bug River for cooling water and its strategic location within the Khmelnytskyi Oblast. This placement allowed the plant to serve as a primary baseload provider for the western grid, reducing transmission losses from the eastern industrial hubs.

Construction of the first two units began in the mid-1970s, utilizing the proven VVER-440 technology, a pressurized water reactor design widely deployed across the Soviet Union. Unit 1 achieved criticality in 1980, marking the initial phase of commercial operation. Unit 2 followed shortly after, with both units fully commissioned by 1982, aligning with the broader timeline of the Soviet nuclear fleet expansion. These early units featured four-loop reactor designs, each with a net capacity of approximately 440 MW, providing a combined output that significantly stabilized the regional power supply. The construction process involved thousands of workers and required the establishment of extensive support infrastructure, including a dedicated worker’s town and a network of 110 kV and 220 kV transmission lines to integrate the new generation into the Ukrainian grid.

Background: The VVER-440 reactors used in the first two units are distinct from the later VVER-1000 designs. They utilize horizontal steam generators and a four-loop coolant system, which influences maintenance schedules and fuel cycle management.

The success of the first two units prompted plans for expansion to meet growing energy demands. Units 3 and 4 were constructed using the upgraded VVER-1000 technology, offering greater efficiency and higher output per reactor. Construction on these larger units commenced in the late 1980s, but the political and economic turbulence of the late Soviet period introduced delays. Unit 3 was commissioned in 1988, while Unit 4 followed in 1990. The transition from VVER-440 to VVER-1000 represented a significant technological leap, with the latter featuring vertical steam generators and a more robust containment structure, enhancing safety margins and operational flexibility. By the early 1990s, the plant had reached its full four-unit capacity, totaling approximately 3,600 MW, making it one of the largest nuclear facilities in Ukraine.

The operational history of the Khmelnytskyi NPP has been marked by steady performance and strategic importance. Under the operator Energoatom, the plant has undergone several modernization efforts to extend the lifespan of its reactors and improve safety standards, particularly in the wake of the Chernobyl disaster. The plant’s location in western Ukraine has also made it a critical node for energy exports to neighboring European countries, enhancing its geopolitical significance. Despite the challenges posed by the 2022 Russian invasion of Ukraine, the plant has remained largely operational, demonstrating the resilience of its infrastructure and the skill of its workforce. The Khmelnytskyi NPP continues to play a vital role in Ukraine’s energy mix, providing a stable and low-carbon source of electricity to millions of households and industries.

Technical Specifications and Reactor Design

The Khmelnytskyi Nuclear Power Plant utilizes pressurized water reactor (PWR) technology, specifically the Soviet-designed VVER-1000 series. This design is characterized by a vertical pressure vessel containing the reactor core, where uranium fuel assemblies are arranged in a hexagonal lattice. The primary coolant loop circulates pressurized water through the core, transferring heat to secondary loops via steam generators without introducing radioactivity into the turbine system. This separation enhances operational safety and maintenance accessibility compared to boiling water reactors.

Each of the four units at Khmelnytskyi is equipped with a VVER-1000/326 reactor model, which represents an evolution of earlier VVER designs with improved instrumentation and control systems. The reactor pressure vessel is constructed from low-alloy steel with an inner stainless steel cladding to resist neutron embrittlement. The active core height is approximately 3.6 meters, containing around 163 fuel assemblies per unit. Each assembly consists of 57 fuel rods enriched to about 3–4% U-235, providing a typical fuel cycle length of 12 to 18 months depending on operational strategies.

Reactor and Turbine Specifications

The secondary steam drives double-flow, condensing turbine generators manufactured by Leningrad Metal Works. These turbines operate at a steam pressure of approximately 8.8 MPa and a temperature of 295°C. The generator rotor rotates at 3,000 RPM, producing electricity at 20 kV before stepping up to grid voltage via main transformers. The net electrical capacity per unit is roughly 900 MW, contributing to the plant’s total installed capacity of 3,600 MW as reported by Energoatom. Gross capacity is slightly higher, around 950 MW per unit, accounting for auxiliary power consumption such as cooling pumps and feedwater heaters.

Parameter	Unit 1	Unit 2	Unit 3	Unit 4
Reactor Model	VVER-1000/326	VVER-1000/326	VVER-1000/326	VVER-1000/326
Net Capacity (MW)	900	900	900	900
Gross Capacity (MW)	950	950	950	950
Commissioning Year	1982	1984	1986	1990
Fuel Enrichment (%)	3.5	3.5	3.5	3.5

Did you know: The VVER-1000 design includes a biological shield made of heavy concrete, weighing over 35,000 tons per unit, to protect against neutron and gamma radiation during operation and maintenance.

The plant’s thermal efficiency is approximately 35%, typical for PWRs of this generation. This means that for every 1,000 MW of thermal energy produced in the core, about 350 MW is converted into electrical power. The remaining heat is dissipated through a cooling system that draws water from the Southern Bug River, utilizing natural draft cooling towers to minimize thermal pollution. This configuration allows for stable baseload power generation, crucial for Ukraine’s grid stability.

Operational data from Energoatom indicates that the units undergo refueling outages every 12 to 18 months, during which approximately one-third of the fuel assemblies are replaced. This strategy optimizes neutron flux distribution and extends the core’s life. The plant has also implemented digital control systems to enhance monitoring of reactor parameters, including neutron flux, coolant temperature, and pressure levels. These upgrades have improved reliability and reduced unplanned shutdowns over the years.

While the VVER-1000 design is robust, it requires continuous attention to material fatigue in the pressure vessel, particularly due to neutron irradiation. Regular ultrasonic testing and spectral analysis are conducted to assess the vessel’s integrity. Additionally, the plant employs a diverse range of safety systems, including emergency core cooling and containment buildings designed to withstand external impacts and internal pressure surges. These features align with international safety standards, ensuring the plant’s continued operational status as of 2026.

Cooling Systems and Environmental Impact

The Khmelnytskyi Nuclear Power Plant relies on a combination of cooling infrastructure to manage the thermal load generated by its four VVER reactors. As of 2026, the facility operates with a total net capacity of approximately 3,600 MW, a scale that demands substantial heat rejection to maintain thermodynamic efficiency. The primary cooling source is the Southern Bug River, which flows in close proximity to the site. This geographical advantage allows the plant to utilize a mixed cooling strategy, leveraging both natural water bodies and mechanical evaporation to regulate reactor temperatures.

Cooling Infrastructure

The plant utilizes the Southern Bug River as a primary heat sink. Water is drawn from the river, passed through condensers in the turbine halls, and returned to the water body at an elevated temperature. This method, known as once-through cooling, is highly efficient in terms of energy consumption but places significant thermal stress on the river ecosystem. To supplement this and provide redundancy, the facility also employs large natural-draft cooling towers. These hyperbolic structures are visible landmarks of the plant and serve to evaporate a portion of the cooling water, thereby reducing the volume of water returned to the river and moderating the thermal load during peak summer months.

Background: The choice of the Southern Bug as a cooling source was a critical design decision in the late 1970s. The river's flow rate and temperature profile were selected to ensure stable operation for the VVER-1000 reactors, which are sensitive to inlet water temperature variations.

Environmental Footprint

The environmental impact of the cooling systems is primarily thermal. The discharge of heated water into the Southern Bug creates a thermal plume that can raise local water temperatures by several degrees Celsius. This thermal pollution affects aquatic life, particularly fish species that are sensitive to temperature changes. Warmer water holds less dissolved oxygen, which can lead to stratification and reduced oxygen levels in the lower layers of the river. Additionally, the cooling towers contribute to local humidity and can create microclimatic effects, including the formation of fog or low clouds during cold, dry weather. These visual and meteorological impacts are often noted by local residents and environmental monitors.

Water consumption is another significant factor. The evaporative cooling process in the towers results in a continuous loss of water, which must be replenished from the Southern Bug. During drought periods, the water level in the river can drop, potentially affecting the plant's cooling efficiency and requiring adjustments in operation. The plant's operator, Energoatom, monitors water quality and quantity to ensure that the thermal and hydraulic loads remain within acceptable limits. This includes regular testing for dissolved oxygen, temperature, and biological indicators in the river downstream of the discharge point.

Environmental regulations in Ukraine require nuclear plants to manage their thermal discharge to minimize ecological disruption. The Khmelnytskyi NPP complies with these standards by adjusting the mix of once-through and evaporative cooling based on seasonal conditions. In summer, when the river is warmer and the biological sensitivity is higher, the plant may increase the use of cooling towers to reduce the thermal load on the river. In winter, the once-through system is often more efficient, and the river can absorb more heat without significant ecological impact. This adaptive management approach helps balance operational efficiency with environmental stewardship.

Long-term monitoring data indicates that the thermal impact is localized and generally reversible. The river's flow helps to disperse the heated water, and the ecosystem has adapted to the periodic temperature fluctuations. However, climate change poses new challenges, with potential variations in river flow and temperature that could affect the plant's cooling strategy. Future adaptations may include enhanced monitoring, improved cooling efficiency, and potential upgrades to the cooling infrastructure to ensure resilience against changing environmental conditions.

How does the Khmelnytskyi NPP integrate with the Ukrainian Grid?

The Khmelnytskyi Nuclear Power Plant (NPP) is a critical node in Ukraine’s national electricity network, providing substantial baseload generation to the western and central regions. As of 2026, the plant operates with a total installed capacity of approximately 3,600 MW, making it one of the largest single-site generators in the country. Its integration into the Ukrainian grid is designed to ensure frequency stability and voltage control, particularly for the Western Power System, which has historically faced challenges due to its distance from major coal and hydro resources.

High-Voltage Transmission Infrastructure

The plant’s electrical output is stepped up through on-site transformer substations and fed into the high-voltage transmission network. The primary interconnection occurs at the 400 kV level, which serves as the backbone for long-distance power transmission across Ukraine. This voltage level allows for efficient delivery of electricity to load centers in Kyiv, Vinnytsia, and further east, minimizing line losses over distances exceeding 150 kilometers. The 400 kV lines are typically double-circuited, providing redundancy that is crucial during peak demand or when adjacent generators are undergoing maintenance.

In addition to the main 400 kV feeders, the Khmelnytskyi NPP is connected to the regional 220 kV network. This secondary voltage level primarily serves local industrial consumers and smaller distribution networks within Khmelnytskyi Oblast. The 220 kV connections provide flexibility for grid operators to balance local load fluctuations without overburdening the main 400 kV trunk lines. This dual-voltage integration enhances the resilience of the regional grid, allowing for more granular control over power flow and voltage profiles during varying operational conditions.

Grid Stability: Nuclear plants like Khmelnytskyi provide significant "inertia" to the grid. Unlike solar PV or wind turbines, which often rely on power electronics, the large rotating masses of nuclear generators help stabilize grid frequency during sudden changes in supply or demand.

Baseload Role and Grid Stability

Khmelnytskyi NPP is primarily dispatched as a baseload generator, meaning it runs at a relatively constant output to meet the minimum level of demand on the grid. This characteristic is vital for the Ukrainian grid, which has a high share of thermal and nuclear power. The plant's consistent output reduces the need for rapid ramping by more flexible, but often more expensive, thermal units. During winter peaks, the combined output of its four VVER-1000 reactors can cover a significant portion of the regional demand, reducing reliance on imported electricity from neighboring countries.

The plant also contributes to grid stability through reactive power compensation. The synchronous generators at Khmelnytskyi can absorb or inject reactive power, helping to maintain voltage levels within acceptable limits across the transmission network. This is particularly important in the Western Power System, which has historically been somewhat isolated from the rest of the Ukrainian grid. By providing both active power (measured in MW) and reactive power (measured in MVAR), the plant helps prevent voltage collapses and ensures a steady supply quality for sensitive industrial and residential consumers.

Operational data from Energoatom indicates that the plant maintains a high capacity factor, often exceeding 85%, which underscores its reliability as a baseload source. This high utilization rate means that the transmission infrastructure connected to Khmelnytskyi is consistently loaded, requiring regular maintenance and occasional upgrades to handle thermal and electrical stresses. The integration strategy continues to evolve as Ukraine incorporates more renewable energy sources, with the nuclear plant serving as a stable anchor amidst the variable output of wind and solar farms.

Operational Challenges and Modernization

Extending the service life of the Khmelnytskyi Nuclear Power Plant has required a sustained program of technical upgrades and operational adjustments, particularly as the facility navigated the transition from Soviet-era planning to a competitive European market. The plant, operated by Energoatom, relies on VVER-1000 pressurized water reactors, a design that demands rigorous maintenance of the primary circuit and steam generators to maintain efficiency and safety margins. In the 2010s and 2020s, the focus shifted significantly toward modernizing auxiliary systems and integrating digital instrumentation to reduce downtime and enhance diagnostic precision.

Fuel cycle management has been a critical component of these efforts. The plant has worked to optimize the burnup of uranium fuel assemblies, allowing for longer cycles between outages. This optimization reduces the frequency of cold shutdowns, thereby increasing the annual capacity factor. According to operator reports, improvements in fuel enrichment and assembly design have helped stabilize output even as the reactor cores age. However, this comes with increased complexity in handling spent fuel, requiring robust interim storage solutions while the national repository project advances.

Caveat: While modernization extends operational life, it does not eliminate the inherent aging of primary components like the reactor pressure vessel, which remains a key focus of surveillance programs.

The impact of the 2022 Russian invasion of Ukraine introduced unprecedented operational challenges. The plant had to implement enhanced security protocols and adjust staffing models to account for personnel mobilization and displacement. Despite these disruptions, the facility maintained a high level of operational readiness, demonstrating the resilience of its infrastructure. Grid integration also required adjustments, as the Southern Bug region experienced fluctuating demand and transmission constraints. Energoatom coordinated with the national grid operator to balance output, often utilizing the plant’s ability to modulate power output to stabilize frequency.

Modernization efforts have also targeted environmental performance. Upgrades to the cooling systems and condenser efficiency have helped reduce thermal discharge into the Southern Bug, mitigating ecological impact. Additionally, the plant has invested in decontamination technologies to manage liquid and solid radioactive waste more effectively. These improvements align with European Union standards, facilitating the plant’s integration into the broader European energy network. The goal is to ensure that the Khmelnytskyi NPP remains a reliable baseload source, contributing approximately 3,600 MW to the Ukrainian grid as of 2026.

Looking ahead, the plant faces the challenge of integrating with a more renewable-heavy grid. This requires greater flexibility in operation, potentially involving more frequent load-following. Energoatom has initiated studies on digital twin technology to simulate reactor behavior under varying conditions, aiming to predict maintenance needs more accurately. These initiatives reflect a broader trend in nuclear energy: leveraging data and advanced materials to extend the economic viability of existing assets. The success of these efforts will determine whether the plant can operate beyond its initial 40-year design life, potentially reaching 60 years with further upgrades.

Safety Features and Post-Chernobyl Upgrades

The Khmelnytskyi Nuclear Power Plant relies on robust passive and active safety systems inherent to its VVER-1000 reactor design, supplemented by extensive retrofits following the 1986 Chernobyl disaster. The plant utilizes four pressurized water reactors (PWRs), each housed within a distinct containment structure designed to withstand internal pressure and external impacts. Unlike the graphite-moderated RBMK reactors at Chernobyl, VVER reactors feature a robust steel-and-concrete containment dome, which serves as the final barrier against radioactive release. This fundamental architectural difference significantly mitigated the immediate risk of a similar core-exposure scenario at Khmelnytskyi.

Containment and Primary Circuit Integrity

Each of the four units at Khmelnytskyi is enclosed in a spherical containment building. These structures are engineered to handle a design basis accident, maintaining integrity under high pressure and temperature conditions. The primary circuit, which carries the heated coolant from the reactor core to the steam generators, is double-walled in critical sections to minimize leakage risks. Safety injection systems provide emergency core cooling by injecting borated water into the reactor vessel, compensating for loss-of-coolant accidents (LOCA). These systems are powered by multiple redundant diesel generators and battery banks, ensuring operation even during prolonged grid outages.

The plant’s safety philosophy emphasizes defense in depth. Multiple independent safety trains ensure that if one system fails, another can take over. This includes separate cooling towers for each unit and distinct electrical feeders. The control rooms are located in shielded buildings, allowing operators to monitor and manage the reactor status during transient events. Regular pressure tests and seismic analysis confirm the structural resilience of the containment domes, which are critical for confining steam and radioactive isotopes during a blowdown event.

Caveat: While VVER reactors are generally considered safer than RBMKs, they are not immune to operational errors. The 2020 incident at Unit 2, where a temporary loss of cooling occurred due to a valve malfunction, highlighted the importance of human-machine interface design and operator training in modern nuclear safety.

Post-Chernobyl Modifications

Following the Chernobyl accident, Ukraine implemented a comprehensive safety upgrade program for its VVER fleet, including Khmelnytskyi. Key modifications included the installation of additional safety injection pumps and the enhancement of the emergency core cooling system. The plant also adopted stricter operational procedures, such as limiting the reactor power level during certain maintenance phases to reduce the risk of positive void coefficient effects, although this is less critical in PWRs than in RBMKs.

Significant investments were made in fire protection systems. The reactor buildings received improved fire detection and suppression networks, including water sprinklers and foam systems. Electrical cable penetrations were sealed with fire-resistant materials to prevent the spread of flames along cable routes, a common vulnerability identified in post-Chernobyl audits. The plant also upgraded its seismic monitoring systems to detect ground motion in real-time, allowing for automatic reactor scram if thresholds are exceeded.

Another critical upgrade involved the modernization of the control rod drive mechanisms. These mechanisms control the insertion speed of control rods, which absorb neutrons to regulate or halt the fission reaction. Enhanced drive systems ensure faster and more reliable rod insertion during an emergency shutdown, reducing the peak power excursion. Additionally, the plant installed new instrumentation and control systems to provide operators with more accurate and timely data on reactor parameters, improving decision-making during transients.

The Khmelnytskyi plant also participated in the European Utility Requirements (EUR) program, which aimed to standardize safety features across European VVERs. This included the addition of a second containment venting system and the improvement of the spent fuel pool cooling systems. These upgrades were funded through a mix of state budgets and international loans, reflecting the strategic importance of nuclear power in Ukraine’s energy mix. The continuous modernization efforts have significantly enhanced the plant’s safety profile, aligning it with international best practices for Generation II+ nuclear facilities.

What distinguishes Khmelnytskyi from other Ukrainian NPPs?

The Khmelnytskyi Nuclear Power Plant occupies a specific niche within Ukraine’s nuclear fleet, defined by its reactor technology and strategic location in western Ukraine. Unlike the massive Zaporizhzhia Nuclear Power Plant, which relies on six VVER-1000 reactors to generate over 6,000 MW, Khmelnytskyi utilizes four VVER-1000 units for a total net capacity of approximately 3,600 MW. This makes it the second-largest nuclear facility in the country by capacity. The choice of the VVER-1000 pressurized water reactor (PWR) aligns Khmelnytskyi with the majority of the Ukrainian fleet, including Rivne and South Ukraine, ensuring commonality in fuel supply, maintenance protocols, and spare parts logistics managed by the state operator, Energoatom.

Geographic positioning is the primary differentiator for Khmelnytskyi. Located in western Ukraine, near the Southern Bug river, it serves as a critical power source for the western grid, which has historically been more interconnected with Central European networks than the eastern plants. This location provided strategic redundancy during the early years of the war in Ukraine. While Zaporizhzhia, the largest plant, is situated in the contested south-east, and Rivne is further west but closer to the border with Poland, Khmelnytskyi sits in a relatively stable zone. This geographic buffer has allowed it to maintain consistent output, reducing the risk of simultaneous loss of multiple large baseload generators in a single theater of conflict.

The operational profile of Khmelnytskyi also reflects its age and design. Commissioned in 1982, the plant’s first unit entered service during the peak of Soviet nuclear expansion. The VVER-1000 reactors at Khmelnytskyi are of the V-328 series, which features a single-loop design with a natural circulation option for the steam generator, offering inherent safety characteristics. However, like other Soviet-era PWRs, they face challenges related to fuel burnup and turbine efficiency compared to newer Western PWRs or the EPR designs. The plant’s proximity to the Southern Bug provides adequate cooling water, a critical factor for thermal efficiency, though seasonal variations in river levels can impact output, a common issue for river-cooled nuclear sites.

Caveat: While Khmelnytskyi is a major baseload provider, its western location means it does not directly feed the industrial heartland of eastern Ukraine, which relies more heavily on Zaporizhzhia and South Ukraine NPPs. This creates a north-south transmission dependency.

Comparative analysis shows that Khmelnytskyi’s role is less about sheer volume than strategic balance. Zaporizhzhia provides the bulk of the national output, but its exposure to geopolitical risk makes Khmelnytskyi a vital stabilizer. Rivne, also in the west, has a similar capacity but is older in terms of initial commissioning of its first unit, though both plants have undergone extensive modernization. Khmelnytskyi’s continued operation is crucial for grid stability in western Ukraine, supporting both domestic consumption and potential cross-border exports to Poland and Romania. The plant’s ability to maintain high capacity factors, often exceeding 85% in recent years, underscores the robustness of the VVER-1000 design and the effectiveness of Energoatom’s operational management.

The distinction also lies in the plant’s integration with the regional grid infrastructure. The western grid, including Khmelnytskyi, has seen increased investment in interconnectors to enhance energy security. This includes the synchronization with the Continental European Network (CEN), which allows for greater flexibility in power trading and frequency control. Khmelnytskyi’s consistent output helps balance the intermittent nature of renewable energy sources, particularly wind and solar, which are expanding in the western regions. This synergy between nuclear baseload and renewables is a key feature of Ukraine’s energy transition strategy, positioning Khmelnytskyi not just as a legacy asset but as a dynamic component of a modernizing grid.

Operational challenges remain, particularly regarding the aging infrastructure and the need for continuous modernization. The plant has undergone several upgrades to enhance safety and efficiency, including the installation of new turbine generators and control systems. These investments are critical to extending the operational life of the reactors, which are expected to run well into the 2030s. The geopolitical situation continues to influence operational strategies, with Khmelnytskyi serving as a model for resilience in nuclear energy management under stress. Its performance provides valuable data for other VVER operators globally, particularly in terms of maintaining high availability in a dynamic external environment.

Khmelnytskyi Nuclear Power Plant: Technical Profile and Operational History