The ACP1000 nuclear-grade canned pump, as the third-stage canned pump for the world's first "Hualong One" reactor, can be summarized by its structural features: based on the mature Imperial canned pump technology, it has been enhanced with improved vibration resistance, low noise, and high reliability to meet nuclear safety requirements and the special operating conditions of "Hualong One".

🔧 Core Structural Features
According to the exclusive supplier information for the first "Hualong One" reactor (Fuqing Units 5 and 6), the structural features of the ACP1000 nuclear-grade canned pump are mainly reflected in the following aspects:

Structural Dimension | Feature Description | Design Purpose/Technical Highlights

Basic Configuration | Single-suction, single-stage, horizontal structure | Suitable for medium-low pressure and medium-low head conditions in auxiliary loops within the nuclear island (such as equipment cooling water, boric acid transportation, etc.), with a mature and reliable structure.

Sealing Design | Completely leak-free static seal | Inheriting the core advantages of the Imperial canned pump, it adopts a fully enclosed canned motor, completely eliminating the risk of radioactive media leakage and meeting the highest safety requirements for nuclear-grade equipment.

Seismic Performance: Meeting the sealing requirements during extreme safety earthquakes (SL-2), this is one of the most critical reinforced design features of nuclear-grade pumps. Strength calculations of pressure-bearing components, overall seismic analysis, and experimental verification ensure the pump's boundary integrity and operability under extreme earthquake conditions.

Noise Control: Noise ≤70dB. Compared to ordinary industrial pumps, extremely high requirements are placed on vibration and noise. Through precise hydraulic design, high-precision dynamic balancing, and optimized bearing fit, low-noise operation is achieved, improving the working environment within the nuclear island.

Motor and Insulation: Explosion-proof motor, nuclear-grade insulation system. Explosion-proof design adapts to the potential risk of hydrogen accumulation within the nuclear island; the motor insulation system must meet the long-term reliability requirements of nuclear-grade equipment, withstanding radiation and aging.

Materials and Manufacturing: Nuclear-grade materials, strict quality control. All flow-through and pressure-bearing components are made of nuclear-grade stainless steel and other materials, possessing excellent corrosion resistance and mechanical properties; the manufacturing process must adhere to the nuclear quality assurance system, achieving full traceability.

💡 Comparison with AP1000 Main Pump

It's important to note that the ACP1000 nuclear-grade canned pump differs from the AP1000's reactor coolant main pump (also known as the "main pump") in structure and application:

Comparison Dimensions: ACP1000 Nuclear-Grade Canned Pump (Empire) AP1000 Canned Main Pump (EMD/Harbin Electric Machinery)

Application Loop: Nuclear Island Auxiliary Loop (Nuclear Level 3) Reactor Primary Loop (Nuclear Level 1)

Structural Form: Single-stage, Horizontal Single-stage, Vertical, High Moment of Inertia

Key Components: Standard canned motor + pump hydraulic components Including special components such as heat shield and flywheel

Design Life: Conventional nuclear-grade life 60 years

The AP1000 canned main pump has a vertical structure, including a heat shield (isolieving the high temperature on the pump side and the motor side) and a high moment of inertia flywheel (increasing coasting time to ensure core cooling after a power outage). The ACP1000 nuclear-grade canned pump is mainly used in auxiliary systems, with a relatively simplified structure, but it still adheres to the stringent standards of nuclear-grade equipment. 🏭 Application Achievements

This type of pump has been successfully applied to Units 5 and 6 of the Fuqing Nuclear Power Plant, the world's first "Hualong One" reactor, supplied exclusively by Dalian Imperial. This application achievement fully validates its design, manufacturing, and quality control levels, and also signifies the comprehensive domestic production capability of China's independent third-generation nuclear power technology equipment.

Are you also interested in the technical characteristics of other pump types within the "Hualong One" nuclear island (such as equipment cooling water pumps and boric acid transfer pumps)? We can discuss this further.