Drawing on 20 years of stable, high-quality intelligent manufacturing expertise in the ventilation industry, Jindun Fans has integrated research and innovation into every stage of design and production.We are committed to advancing smart, low-carbon ventilation solutions, driving innovation in productivity, and empowering key industries such as rail transit, nuclear power, marine vessels, civil and industrial construction, and air transportation.
Nuclear-grade axial fans are essential environmental control devices in nuclear power plants, ensuring ventilation, cooling, negative pressure maintenance, and leakage prevention. They work in conjunction with air filtration systems to purify and filter air during ventilation processes, thereby creating a clean and comfortable working environment for both personnel and equipment.
These fans are primarily used in reactor cooling systems, containment ventilation systems, auxiliary building ventilation systems, and radioactive waste treatment systems.
Nuclear-Grade Centrifugal Fans
The primary function of nuclear-grade centrifugal fans is to facilitate ventilation and air exchange within nuclear power plants, maintain negative pressure environments, and dissipate heat. Additionally, they contribute to the integrity of containment structures and assist in filtering radioactive aerosols. Designed to meet Anti-Seismic Category I standards, these fans are engineered to withstand and remain operational during and after a Safe Shutdown Earthquake (SSE). With a design lifespan exceeding 60 years, they offer high efficiency, low vibration and noise, compact structure, radiation resistance, smooth operation, and exceptional reliability.
Widely used in various nuclear power projects.
CAM Containment Atmospheric Monitoring Fans
The CAM containment atmospheric monitoring fans are designed according to Anti-Seismic Category 1A standards. Their primary function is to reduce the radioactive levels of fission inert gases inside the containment structure and ensure they remain below the specified limits, thereby allowing personnel to safely enter the containment. These fans are responsible for transporting air containing radioactive particles, operating 24 hours a day with a continuous runtime of at least 6 months. The fans are characterized by their compact size, high efficiency, radiation resistance, low leakage, explosion-proof capabilities, smooth operation, and overall safety and reliability.
Widely used in various nuclear power projects.
Nuclear-Grade Process Fans
Nuclear-grade process fans are designed according to Anti-Seismic Category 1A standards and are equipped with variable frequency control. These fans are used for exhaust in process systems, ensuring long-term and effective operation under both normal and accident conditions. The fans have a design lifespan exceeding 40 years and are characterized by small airflow volumes, high pressure, radiation resistance, low leakage, smooth operation, and reliable safety.
Widely used in various nuclear power projects.
Nuclear-Grade/Non-Nuclear Grade Air Handling Units
Nuclear-grade and non-nuclear-grade air handling units are composed of various air treatment functional segments, designed to provide suitable temperature, humidity, and cleanliness in the air environment for critical areas such as the main control room and equipment room of nuclear power plants. This ensures the normal operation of equipment and the working conditions for personnel, while also filtering, purifying, and treating potentially contaminated air under both normal and accident operating conditions, thereby limiting the release of radioactive materials and protecting the surrounding environment and personnel safety of the nuclear power plant.
The unit is classified as seismic category Class 1 or Class 1A, effectively removing particles larger than 0.3μm, with a filtration efficiency exceeding 99.99%. It is characterized by high seismic resistance, low leakage rate, low noise, high cleanliness, stable operation, and high safety and efficiency.
These units are widely used in Hualong One, passive nuclear power units, air-cooled reactors, fast reactors, and VVER nuclear islands as part of the HVAC systems.
Containment Circulating Cooling Units
Containment circulating cooling units are essential environmental control equipment that ensures the operational functionality of nuclear power plants. They provide cooling or heating for the air inside the containment structure, offering a clean and comfortable environment for both plant operations and personnel. The key technical specifications of these units meet or exceed international advanced level, filling a gap in domestic technology, and the key technologies have been granted national invention patents.
These units are primarily used in the ventilation systems of AP1000/CAP1400 passive nuclear power units.
Nuclear-Grade Air Filtration Systems
Nuclear-grade air filtration systems consist of filter housings and filter frames and are used to filter air entering the nuclear power plant buildings or control rooms. They remove dust, radioactive aerosols, and other contaminants from the air, preventing the spread of radioactive materials inside the plant and ensuring that clean, safe air is provided for personnel to breathe. The structural strength of nuclear-grade filtration systems meets the requirements for normal operational loads (such as the 6000 Pa negative pressure caused by a sudden valve closure), equipment pressure differentials (150 Pa for low-efficiency filters and 650 Pa for high-efficiency air particle filters), and seismic loads (maintaining structural integrity under the response spectrum conditions for each equipment floor). The maximum working temperature is capable of continuous operation at 328°C for up to 4 hours. These filtration systems are characterized by high efficiency, low vibration and noise, compact structure, radiation resistance, smooth operation, and high reliability.
They are primarily used in the ventilation systems of nuclear power projects.
Nuclear Power Plant Silencers
Nuclear power plant silencers are designed to reduce noise levels from exhaust air entering the main control room during extreme accident scenarios. The design features a multi-stage expansion-type impedance composite silencing structure, effectively reducing exhaust noise to below 65 dBA. These silencers offer high insertion loss, low pressure loss, compact structure, strong seismic performance, and require no maintenance.
They are primarily used in noise control for the ventilation systems of nuclear power plants.
Nuclear Power Plant Silencers
Nuclear power plant silencers are designed to reduce noise levels from exhaust air entering the main control room during extreme accident scenarios. The design features a multi-stage expansion-type impedance composite silencing structure, effectively reducing exhaust noise to below 65 dBA. These silencers offer high insertion loss, low pressure loss, compact structure, strong seismic performance, and require no maintenance.
They are primarily used in noise control for the ventilation systems of nuclear power plants.
Nuclear-Grade Air Dampers
Nuclear-grade air dampers are primarily used in the ventilation systems of nuclear islands, atmospheric monitoring systems inside containment structures, and at fan outlets. Their primary functions include blocking airflow, shutting off ventilation systems, preventing the backflow of radioactive gases, and enabling automatic system isolation. These dampers come in various structural forms, including shut-off isolation dampers, opposed-blade isolation dampers, electromagnetic quick-closing dampers, pneumatic quick-closing dampers, regulating dampers, and check valves.
Design Pressure: ≤0.05 MPa; Design Temperature: ≤250°C; Working Medium: Air, including air containing radioactive particles.
These air dampers play a critical role in ensuring the safe and controlled operation of nuclear island ventilation systems, atmospheric monitoring within containment structures, and air regulation at fan outlets.
