Nuclear Power Plant Cable

Nuclear power plants are the most demanding application for cables in industry. Cables inside the nuclear island must withstand long-term gamma radiation exposure. They must also survive LOCA (loss of coolant accident) conditions with high-temperature, high-pressure steam and boric acid solution impact. They must remain intact during earthquakes. These cables ensure core safety functions like reactor shutdown and residual heat removal. Anhui Tiankang's nuclear power plant cables strictly follow GB/T22577-2025 and NB/T20018 standards. They cover Class 1E (K1/K2/K3) and non-Class 1E series. Design life is 40 to 60 years.

Safety classification is the core of nuclear power plant cables. K1 class is the highest level. These cables are installed inside the reactor containment. They must pass long-term gamma radiation exposure (250kGy normal + 300kGy accident), LOCA accident simulation (high-temperature steam + boric acid spray), and SL2 seismic testing. K1 cables serve the most critical safety circuits including emergency shutdown, safety injection, and residual heat removal.

Nuclear power plant cable products include K2 class installed inside the containment but not requiring LOCA testing. These serve containment monitoring, lighting, and auxiliary control circuits. K3 class is installed outside the containment (nuclear auxiliary buildings, conventional island). They require low-dose radiation testing and SL2 seismic testing. They serve peripheral power distribution, ventilation, and instrument circuits. Each class has strict differences in insulation, sheath materials, and structural design.

We offer five functional categories. Power cables (medium voltage 6/10kV, low voltage 0.6/1kV) transmit power to main and auxiliary equipment. They use radiation-crosslinked XLPE insulation. The material is halogen-free and low-smoke flame-retardant. Control cables have multi-core shielded structures. They transmit switch, valve, and pump control signals. They resist electromagnetic interference.

Instrument measurement cables (compensation/shielded) carry thermocouple and transmitter signals. Low-noise shielding ensures stable micro-signal transmission. Communication/coaxial RF cables transmit reactor detector signals. For high-temperature, high-radiation environments, silicon dioxide (SiO₂) insulation withstands up to 1000°C. Mineral insulated fire-resistant cables (MI) use magnesium oxide inorganic insulation and metal sheaths. These continue working even in extreme fires. They serve emergency power and fire-fighting critical circuits.

All nuclear power plant cables use halogen-free low-smoke LSZH sheaths. PVC is strictly prohibited. Smoke density Dm ≤150. Halogen acid release ≤5mg/g. Oxygen index ≥30. This ensures no toxic smoke is produced during fires. Insulation uses nuclear-grade radiation-crosslinked XLPE or EPR formulations. All products strictly follow IEEE 383 qualification standards. Complete type test reports are provided. Export shipments meet IEC 60502, IEC 60794, and CE certification requirements.